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  1. <p align="center">
  2. <img src="https://github.com/trimstray/awesome-ninja-admins/blob/master/doc/img/awesome_ninja_admins.png"
  3. alt="Master">
  4. </p>
  5. <br>
  6. <h4 align="center">A collection of awesome lists, manuals, blogs, hacks, one-liners and tools for <b>Awesome Ninja Admins</b>.</h4>
  7. <br>
  8. <p align="center">
  9. <a href="https://github.com/trimstray/awesome-ninja-admins/tree/master">
  10. <img src="https://img.shields.io/badge/Branch-master-green.svg?longCache=true"
  11. alt="Branch">
  12. </a>
  13. <a href="https://awesome.re">
  14. <img src="https://awesome.re/badge.svg"
  15. alt="Awesome">
  16. </a>
  17. <a href="http://www.gnu.org/licenses/">
  18. <img src="https://img.shields.io/badge/License-GNU-blue.svg?longCache=true"
  19. alt="License">
  20. </a>
  21. </p>
  22. <div align="center">
  23. <sub>Created by
  24. <a href="https://twitter.com/trimstray">trimstray</a> and
  25. <a href="https://github.com/trimstray/awesome-ninja-admins/graphs/contributors">
  26. contributors
  27. </a>
  28. </div>
  29. <br>
  30. ***
  31. ## Who is Ninja Admins?
  32. - race of pure evil who rule the network through a monarchist feudal system
  33. - they never opened the door for strangers (or anyone at all)
  34. - they know very nasty piece of code like a **[fork bombs](https://en.wikipedia.org/wiki/Fork_bomb)**
  35. - they can make dd is not a **[destroyer of disks](http://www.noah.org/wiki/Dd_-_Destroyer_of_Disks)**
  36. - they know that `#!/usr/bin/env bash` superior to `#!/bin/bash`
  37. - they know that `su -` logs in completely as root
  38. - they miss and cry for **[Slackware](http://www.slackware.com/)** on production
  39. - they love the old admin nix-world
  40. ## What is this list?
  41. This list is a collection of various materials that I use every day in my work. It contain a lot of useful information gathered in one piece. It is intended for everyone and anyone who is or wants to become a Ninja Admin (and not only).
  42. This is not a final and full version - I update it on an ongoing basis.
  43. ## :ballot_box_with_check: Todo
  44. - [ ] Add useful shell functions
  45. - [ ] Add one-liners for collection tools (eg. CLI Tools)
  46. - [ ] Add Ninja Admins T-Shirt stickers
  47. - [ ] Generate Awesome Ninja Admins book (eg. pdf format)
  48. ## Ninja Admins Collection
  49. #### CLI Tools
  50. ##### :black_small_square: Shells
  51. <p>
  52. &nbsp;&nbsp;:small_orange_diamond: <a href="https://ohmyz.sh/"><b>Oh My ZSH!</b></a> - the best framework for managing your Zsh configuration.<br>
  53. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/Bash-it/bash-it"><b>bash-it</b></a> - framework for using, developing and maintaining shell scripts and custom commands for your daily work.<br>
  54. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/oh-my-fish/oh-my-fish"><b>Oh My Fish</b></a> - the Fishshell framework.<br>
  55. </p>
  56. ##### :black_small_square: Managers
  57. <p>
  58. &nbsp;&nbsp;:small_orange_diamond: <a href="https://midnight-commander.org/"><b>Midnight Commander</b></a> - visual file manager, licensed under GNU General Public License.<br>
  59. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.gnu.org/software/screen/"><b>screen</b></a> - full-screen window manager that multiplexes a physical terminal.<br>
  60. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/tmux/tmux/wiki"><b>tmux</b></a> - terminal multiplexer, lets you switch easily between several programs in one terminal.<br>
  61. </p>
  62. ##### :black_small_square: Network
  63. <p>
  64. &nbsp;&nbsp;:small_orange_diamond: <a href="https://curl.haxx.se/"><b>Curl</b></a> - command line tool and library
  65. for transferring data with URLs.<br>
  66. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/jkbrzt/httpie"><b>HTTPie</b></a> - a user-friendly HTTP client.<br>
  67. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/asciimoo/wuzz"><b>wuzz</b></a> - interactive cli tool for HTTP inspection.<br>
  68. &nbsp;&nbsp;:small_orange_diamond: <a href="https://gnutls.org/manual/html_node/gnutls_002dcli-Invocation.html"><b>gnutls-cli</b></a> - client program to set up a TLS connection to some other computer.<br>
  69. &nbsp;&nbsp;:small_orange_diamond: <a href="https://nmap.org/"><b>nmap</b></a> - free and open source (license) utility for network discovery and security auditing.<br>
  70. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.hping.org/"><b>hping</b></a> - command-line oriented TCP/IP packet assembler/analyzer.<br>
  71. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/traviscross/mtr"><b>mtr</b></a> - functionality of the 'traceroute' and 'ping' programs in a single network diagnostic tool.<br>
  72. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/robertdavidgraham/masscan"><b>masscan</b></a> - the fastest Internet port scanner, spews SYN packets asynchronously.<br>
  73. &nbsp;&nbsp;:small_orange_diamond: <a href="http://netcat.sourceforge.net/"><b>netcat</b></a> - networking utility which reads and writes data across network connections, using the TCP/IP protocol.<br>
  74. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.tcpdump.org/"><b>tcpdump</b></a> - powerful command-line packet analyzer.<br>
  75. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.wireshark.org/docs/man-pages/tshark.html"><b>tshark</b></a> - dump and analyze network traffic (wireshark cli).<br>
  76. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/mschwager/fierce"><b>fierce</b></a> - a DNS reconnaissance tool for locating non-contiguous IP space.<br>
  77. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/aboul3la/Sublist3r"><b>sublist3r</b></a> - fast subdomains enumeration tool for penetration testers.<br>
  78. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/OWASP/Amass"><b>amass</b></a> - tool obtains subdomain names by scraping data sources, crawling web archives and more.<br>
  79. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/troglobit/nemesis"><b>Nemesis</b></a> - packet manipulation CLI tool; craft and inject packets of several protocols.<br>
  80. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/packetfu/packetfu"><b>packetfu</b></a> - a mid-level packet manipulation library for Ruby.<br>
  81. &nbsp;&nbsp;:small_orange_diamond: <a href="https://scapy.net/"><b>Scapy</b></a> - packet manipulation library; forge, send, decode, capture packets of a wide number of protocols.<br>
  82. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/GouveaHeitor/nipe"><b>Nipe</b></a> - script to make Tor Network your default gateway.<br>
  83. </p>
  84. ##### :black_small_square: SSL
  85. <p>
  86. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/nabla-c0d3/sslyze"><b>sslyze
  87. </b></a> - fast and powerful SSL/TLS server scanning library.<br>
  88. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/rbsec/sslscan"><b>sslscan</b></a> - tests SSL/TLS enabled services to discover supported cipher suites.<br>
  89. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/drwetter/testssl.sh"><b>testssl.sh</b></a> - testing TLS/SSL encryption anywhere on any port.<br>
  90. </p>
  91. ##### :black_small_square: Auditing Tools
  92. <p>
  93. &nbsp;&nbsp;:small_orange_diamond: <a href="https://cisofy.com/lynis/"><b>lynis</b></a> - battle-tested security tool for systems running Linux, macOS, or Unix-based operating system.<br>
  94. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/rebootuser/LinEnum"><b>LinEnum</b></a> - scripted Local Linux Enumeration & Privilege Escalation Checks.<br>
  95. </p>
  96. ##### :black_small_square: System Diagnostics/Debuggers
  97. <p>
  98. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/strace/strace"><b>strace</b></a> - diagnostic, debugging and instructional userspace utility for Linux.<br>
  99. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/draios/sysdig"><b>sysdig</b></a> - system exploration and troubleshooting tool with first class support for containers.<br>
  100. &nbsp;&nbsp;:small_orange_diamond: <a href="https://nicolargo.github.io/glances/"><b>glances</b></a> - cross-platform system monitoring tool written in Python.<br>
  101. &nbsp;&nbsp;:small_orange_diamond: <a href="https://en.wikipedia.org/wiki/Lsof"><b>lsof</b></a> - displays in its output information about files that are opened by processes.<br>
  102. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.brendangregg.com/flamegraphs.html"><b>FlameGraph</b></a> - stack trace visualizer.<br>
  103. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/zevv/lsofgraph"><b>lsofgraph</b></a> - small utility to convert Unix lsof output to a graph showing FIFO and UNIX interprocess communication.<br>
  104. </p>
  105. ##### :black_small_square: Log Analyzers
  106. <p>
  107. &nbsp;&nbsp;:small_orange_diamond: <a href="https://goaccess.io/"><b>GoAccess</b></a> - real-time web log analyzer and interactive viewer that runs in a terminal.<br>
  108. </p>
  109. ##### :black_small_square: Databases
  110. <p>
  111. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/xo/usql"><b>usql</b></a> - universal command-line interface for SQL databases.<br>
  112. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/dbcli/pgcli"><b>pgcli</b></a> - postgres CLI with autocompletion and syntax highlighting.<br>
  113. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/dbcli/mycli"><b>mycli</b></a> - terminal client for MySQL with autocompletion and syntax highlighting.<br>
  114. </p>
  115. ##### :black_small_square: Pentesting
  116. <p>
  117. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.metasploit.com/"><b>Metasploit</b></a> - tool and framework for pentesting system, web and many more, contains a lot a ready to use exploit.<br>
  118. &nbsp;&nbsp;:small_orange_diamond: <a href="https://portswigger.net/burp"><b>Burp Suite</b></a> - tool for testing Web application security, intercepting proxy to replay, inject, scan and fuzz HTTP requests.<br>
  119. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.owasp.org/index.php/OWASP_Zed_Attack_Proxy_Project"><b>OWASP Zed Attack Proxy</b></a> - intercepting proxy to replay, inject, scan and fuzz HTTP requests.<br>
  120. &nbsp;&nbsp;:small_orange_diamond: <a href="https://cirt.net/Nikto2"><b>Nikto2</b></a> - web server scanner which performs comprehensive tests against web servers for multiple items.<br>
  121. &nbsp;&nbsp;:small_orange_diamond: <a href="http://sqlmap.org/"><b>sqlmap</b></a> - tool that automates the process of detecting and exploiting SQL injection flaws.<br>
  122. </p>
  123. #### Web Tools
  124. ##### :black_small_square: SSL
  125. <p>
  126. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.ssllabs.com/ssltest/"><b>SSL Server Test</b></a> - free online service performs a deep analysis of the configuration of any SSL web server.<br>
  127. &nbsp;&nbsp;:small_orange_diamond: <a href="https://dev.ssllabs.com/ssltest/"><b>SSL Server Test (DEV)</b></a> - free online service performs a deep analysis of the configuration of any SSL web server.<br>
  128. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.htbridge.com/ssl/"><b>ImmuniWeb® SSLScan</b></a> - test SSL/TLS (PCI DSS, HIPAA and NIST).<br>
  129. &nbsp;&nbsp;:small_orange_diamond: <a href="https://urlscan.io/"><b>urlscan.io</b></a> - service to scan and analyse websites.<br>
  130. &nbsp;&nbsp;:small_orange_diamond: <a href="https://report-uri.com/home/tools"><b>Report URI</b></a> - monitoring security policies like CSP and HPKP.<br>
  131. &nbsp;&nbsp;:small_orange_diamond: <a href="https://csp-evaluator.withgoogle.com/"><b>CSP Evaluator</b></a> - allows developers and security experts to check if a Content Security Policy.<br>
  132. &nbsp;&nbsp;:small_orange_diamond: <a href="https://whynohttps.com/"><b>Why No HTTPS?</b></a> - list of the world's top 100 websites by Alexa rank not automatically redirecting insecure requests.<br>
  133. &nbsp;&nbsp;:small_orange_diamond: <a href="https://cipherli.st/"><b>cipherli.st</b></a> - strong ciphers for Apache, Nginx, Lighttpd and more.<br>
  134. &nbsp;&nbsp;:small_orange_diamond: <a href="https://badssl.com/"><b>badssl.com</b></a> - memorable site for testing clients against bad SSL configs.<br>
  135. &nbsp;&nbsp;:small_orange_diamond: <a href="https://tlsfun.de/"><b>tlsfun.de</b></a> - registered for various tests regarding the TLS/SSL protocol.<br>
  136. &nbsp;&nbsp;:small_orange_diamond: <a href="https://ccadb.org/resources"><b>Common CA Database</b></a> - repository of information about CAs, and their root and intermediate certificates.<br>
  137. &nbsp;&nbsp;:small_orange_diamond: <a href="https://certstream.calidog.io/"><b>CERTSTREAM</b></a> - real-time certificate transparency log update stream.<br>
  138. </p>
  139. ##### :black_small_square: HTTP Headers
  140. <p>
  141. &nbsp;&nbsp;:small_orange_diamond: <a href="https://securityheaders.com/"><b>Security Headers</b></a> - analyse the HTTP response headers (with rating system to the results).<br>
  142. &nbsp;&nbsp;:small_orange_diamond: <a href="https://observatory.mozilla.org/"><b>Observatory by Mozilla</b></a> - set of tools to analyze your website.<br>
  143. &nbsp;&nbsp;:small_orange_diamond: <a href="https://enable-cors.org/index.html"><b>Enable CORS</b></a> - enable cross-origin resource sharing.<br>
  144. </p>
  145. ##### :black_small_square: DNS
  146. <p>
  147. &nbsp;&nbsp;:small_orange_diamond: <a href="http://viewdns.info/"><b>ViewDNS</b></a> - one source for free DNS related tools and information.<br>
  148. &nbsp;&nbsp;:small_orange_diamond: <a href="https://dnslytics.com/"><b>DNSlytics</b></a> - online investigation tool.<br>
  149. &nbsp;&nbsp;:small_orange_diamond: <a href="https://dnsspy.io/"><b>DNS Spy</b></a> - monitor, validate and verify your DNS configurations.<br>
  150. </p>
  151. ##### :black_small_square: Mail
  152. <p>
  153. &nbsp;&nbsp;:small_orange_diamond: <a href="https://mxtoolbox.com/SuperTool.aspx"><b>MX Toolbox</b></a> - all of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.<br>
  154. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.blacklistalert.org/"><b>blacklistalert</b></a> - checks to see if your domain is on a Real Time Spam Blacklist.<br>
  155. &nbsp;&nbsp;:small_orange_diamond: <a href="http://multirbl.valli.org/"><b>MultiRBL</b></a> - complete IP check for sending Mailservers.<br>
  156. </p>
  157. ##### :black_small_square: Mass scanners (search engines)
  158. <p>
  159. &nbsp;&nbsp;:small_orange_diamond: <a href="https://censys.io/"><b>Censys</b></a> - platform that helps information security practitioners discover, monitor, and analyze devices.<br>
  160. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.shodan.io/"><b>Shodan</b></a> - the world's first search engine for Internet-connected devices.<br>
  161. &nbsp;&nbsp;:small_orange_diamond: <a href="https://2000.shodan.io/#/"><b>Shodan 2000</b></a> - if you use Shodan for everyday work, be sure to see it - looks for randomly generated data from Shodan.<br>
  162. &nbsp;&nbsp;:small_orange_diamond: <a href="https://viz.greynoise.io/table"><b>GreyNoise</b></a> - mass scanner (such as Shodan and Censys).<br>
  163. &nbsp;&nbsp;:small_orange_diamond: <a href="https://buckets.grayhatwarfare.com/"><b>Buckets by Grayhatwarfar</b></a> - database with public search for Open Amazon S3 Buckets and their contents.<br>
  164. </p>
  165. ##### :black_small_square: Net-tools
  166. <p>
  167. &nbsp;&nbsp;:small_orange_diamond: <a href="https://toolbar.netcraft.com/site_report"><b>Netcraft</b></a> - detailed report about the site, helping you to make informed choices about their integrity.<br>
  168. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.ripe.net/"><b>RIPE NCC</b></a> - not-for-profit membership association, a Regional Internet Registry and the secretariat for the RIPE.<br>
  169. &nbsp;&nbsp;:small_orange_diamond: <a href="https://securitytrails.com/"><b>Security Trails</b></a> - APIs for Security Companies, Researchers and Teams.<br>
  170. &nbsp;&nbsp;:small_orange_diamond: <a href="https://tools.keycdn.com/curl"><b>Online Curl</b></a> - curl test, analyze HTTP Response Headers.<br>
  171. &nbsp;&nbsp;:small_orange_diamond: <a href="http://ping.eu/"><b>Ping.eu</b></a> - online Ping, Traceroute, DNS lookup, WHOIS and others.<br>
  172. &nbsp;&nbsp;:small_orange_diamond: <a href="https://network-tools.com/"><b>Network-Tools</b></a> - network tools for webmasters, IT technicians & geeks.<br>
  173. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.url-encode-decode.com/"><b>URL Encode/Decode</b></a> - tool from above to either encode or decode a string of text.<br>
  174. &nbsp;&nbsp;:small_orange_diamond: <a href="https://regexr.com/"><b>RegExr</b></a> - online tool to learn, build, & test Regular Expressions (RegEx / RegExp).<br>
  175. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.hardenize.com/"><b>Hardenize</b></a> - deploy the security standards.<br>
  176. </p>
  177. ##### :black_small_square: Code parsers/playgrounds
  178. <p>
  179. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.shellcheck.net/"><b>ShellCheck</b></a> - finds bugs in your shell scripts.<br>
  180. &nbsp;&nbsp;:small_orange_diamond: <a href="https://jsbin.com/?html,output"><b>jsbin</b></a> - live pastebin for HTML, CSS & JavaScript and more.<br>
  181. </p>
  182. ##### :black_small_square: Performance
  183. <p>
  184. &nbsp;&nbsp;:small_orange_diamond: <a href="https://gtmetrix.com/"><b>GTmetrix</b></a> - analyze your site’s speed and make it faster.<br>
  185. &nbsp;&nbsp;:small_orange_diamond: <a href="https://performance.sucuri.net/"><b>Sucuri loadtimetester</b></a> - test here the
  186. performance of any of your sites from across the globe.<br>
  187. </p>
  188. ##### :black_small_square: Passwords
  189. <p>
  190. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.random.org/passwords/"><b>Random.org</b></a> - generate random passwords.<br>
  191. &nbsp;&nbsp;:small_orange_diamond: <a href="https://gotcha.pw/"><b>Gotcha?</b></a> - list of 1.4 billion accounts circulates around the Internet.<br>
  192. &nbsp;&nbsp;:small_orange_diamond: <a href="https://haveibeenpwned.com/"><b>have i been pwned?</b></a> - check if you have an account that has been compromised in a data breach.<br>
  193. </p>
  194. ##### :black_small_square: CVE
  195. <p>
  196. &nbsp;&nbsp;:small_orange_diamond: <a href="https://cve.mitre.org/"><b>CVE Mitre</b></a> - list of publicly known cybersecurity vulnerabilities.<br>
  197. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.cvedetails.com/"><b>CVE Details</b></a> - CVE security vulnerability advanced database.<br>
  198. </p>
  199. #### Manuals/Howtos/Tutorials
  200. ##### :black_small_square: Bash
  201. <p>
  202. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/dylanaraps/pure-bash-bible"><b>pure-bash-bible</b></a> - a collection of pure bash alternatives to external processes.<br>
  203. &nbsp;&nbsp;:small_orange_diamond: <a href="http://wiki.bash-hackers.org/start"><b>The Bash Hackers Wiki</b></a> - hold documentation of any kind about GNU Bash.<br>
  204. </p>
  205. ##### :black_small_square: Programming
  206. <p>
  207. &nbsp;&nbsp;:small_orange_diamond: <a href="https://posts.specterops.io/fawk-yeah-advanced-sed-and-awk-usage-parsing-for-pentesters-3-e5727e11a8ad?gi=c8f9506b26b6"><b>F’Awk Yeah!</b></a> - advanced sed and awk usage (Parsing for Pentesters 3).<br>
  208. </p>
  209. ##### :black_small_square: Unix & Network
  210. <p>
  211. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.cyberciti.biz/"><b>nixCraft</b></a> - linux and unix tutorials for new and seasoned sysadmin.<br>
  212. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.tecmint.com/"><b>TecMint</b></a> - the ideal Linux blog for Sysadmins & Geeks.<br>
  213. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.omnisecu.com/"><b>Omnisecu</b></a> - Free Networking, System Administration and Security Tutorials.<br>
  214. </p>
  215. ##### :black_small_square: Security
  216. <p>
  217. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.owasp.org/index.php/Main_Page"><b>OWASP</b></a> - worldwide not-for-profit charitable organization focused on improving the security of software.<br>
  218. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.owasp.org/index.php/Category:OWASP_Application_Security_Verification_Standard_Project"><b>OWASP ASVS 3.0.1</b></a> - OWASP Application Security Verification Standard Project.<br>
  219. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/Santandersecurityresearch/asvs"><b>OWASP ASVS 3.0.1 Web App</b></a> - simple web app that helps developers understand the ASVS requirements.<br>
  220. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.offensive-security.com/"><b>Offensive Security</b></a> - true performance-based penetration testing training for over a decade.<br>
  221. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.hackingarticles.in/"><b>Hacking Articles</b></a> - LRaj Chandel's Security & Hacking Blog.<br>
  222. &nbsp;&nbsp;:small_orange_diamond: <a href="https://gtfobins.github.io/"><b>GTFOBins</b></a> - list of Unix binaries that can be exploited by an attacker to bypass local security restrictions.<br>
  223. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/toniblyx/my-arsenal-of-aws-security-tools"><b>AWS security tools</b></a> - make your AWS cloud environment more secure.<br>
  224. &nbsp;&nbsp;:small_orange_diamond: <a href="http://html5sec.org/"><b>HTML5 Security Cheatsheet</b></a> - a collection of HTML5 related XSS attack vectors.<br>
  225. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.pentest-standard.org/index.php/Main_Page"><b>PTES</b></a> - the penetration testing execution standard.<br>
  226. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/zardus/ctf-tools"><b>ctf-tools</b></a> - some setup scripts for security research tools.<br>
  227. &nbsp;&nbsp;:small_orange_diamond: <a href="https://guif.re/"><b>Guifre Ruiz Notes</b></a> - collection of secuirty, system, network and pentest cheatsheets.<br>
  228. &nbsp;&nbsp;:small_orange_diamond: <a href="https://inventory.rawsec.ml/index.html"><b>Rawsec's CyberSecurity Inventory</b></a> - an inventory of tools and resources about CyberSecurity.<br>
  229. </p>
  230. ##### :black_small_square: Pentesting
  231. <p>
  232. &nbsp;&nbsp;:small_orange_diamond: <a href="https://brutelogic.com.br/blog/"><b>Brute XSS</b></a> - master the art of Cross Site Scripting.<br>
  233. </p>
  234. ##### :black_small_square: Web Apps
  235. <p>
  236. &nbsp;&nbsp;:small_orange_diamond: <a href="https://infosec.mozilla.org/guidelines/web_security.html"><b>Mozilla Web Security</b></a> - help operational teams with creating secure web applications.<br>
  237. </p>
  238. ##### :black_small_square: Secret Knowledge
  239. <p>
  240. &nbsp;&nbsp;:small_orange_diamond: <a href="https://bitvijays.github.io/LFC-VulnerableMachines.html"><b>CTF Series : Vulnerable Machines</b></a> - the steps below could be followed to find vulnerabilities and exploits.<br>
  241. &nbsp;&nbsp;:small_orange_diamond: <a href="https://hshrzd.wordpress.com/how-to-start/"><b>How to start RE/malware analysis?</b></a> - collection of some hints and useful links for the beginners.<br>
  242. &nbsp;&nbsp;:small_orange_diamond: <a href="https://lzone.de/cheat-sheet/"><b>LZone Cheat Sheets</b></a> - all cheat sheets.<br>
  243. &nbsp;&nbsp;:small_orange_diamond: <a href="https://cheat.readthedocs.io/en/latest/"><b>Dan’s Cheat Sheets’s</b></a> - massive cheat sheets documentation.<br>
  244. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.kegel.com/c10k.html"><b>The C10K problem</b></a> - it's time for web servers to handle ten thousand clients simultaneously, don't you think?<br>
  245. &nbsp;&nbsp;:small_orange_diamond: <a href="https://bankgradesecurity.com/"><b>Bank Grade Security</b></a> - when companies say they have "Bank Grade Security" they imply that it is a good thing.<br>
  246. &nbsp;&nbsp;:small_orange_diamond: <a href="https://drawings.jvns.ca/"><b>Julia's Drawings</b></a> - some drawings about programming and unix world, zines about systems & debugging tools.<br>
  247. &nbsp;&nbsp;:small_orange_diamond: <a href="https://media.defcon.org/DEF%20CON%2026/"><b>DEF CON Media Server</b></a> - great stuff from DEFCON 26.<br>
  248. </p>
  249. #### Blogs
  250. <p>
  251. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.brendangregg.com/"><b>Brendan Gregg's Blog</b></a> - Brendan Gregg is an industry expert in computing performance and cloud computing.<br>
  252. &nbsp;&nbsp;:small_orange_diamond: <a href="http://gynvael.coldwind.pl/"><b>Gynvael "GynDream" Coldwind</b></a> - Gynvael is a IT security engineer at Google.<br>
  253. &nbsp;&nbsp;:small_orange_diamond: <a href="http://lcamtuf.coredump.cx/"><b>Michał "lcamtuf" Zalewski</b></a> - "white hat" hacker, computer security expert.<br>
  254. &nbsp;&nbsp;:small_orange_diamond: <a href="https://ma.ttias.be/"><b>Mattias Geniar</b></a> - developer, Sysadmin, Blogger, Podcaster and Public Speaker.<br>
  255. &nbsp;&nbsp;:small_orange_diamond: <a href="https://nickcraver.com/"><b>Nick Craver</b></a> - Software Developer and Systems Administrator for Stack Exchange.<br>
  256. &nbsp;&nbsp;:small_orange_diamond: <a href="https://robert.penz.name/"><b>Robert Penz</b></a> - IT security Expert.<br>
  257. &nbsp;&nbsp;:small_orange_diamond: <a href="https://scotthelme.co.uk/"><b>Scott Helme</b></a> - Security Researcher, international speaker and founder of securityheaders.com and report-uri.com.<br>
  258. &nbsp;&nbsp;:small_orange_diamond: <a href="https://security.szurek.pl/"><b>Kacper Szurek</b></a> - Detection Engineer at ESET.<br>
  259. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.troyhunt.com/"><b>Troy Hunt</b></a> - Microsoft Regional Director and Microsoft Most Valuable Professional for Developer Security.<br>
  260. &nbsp;&nbsp;:small_orange_diamond: <a href="https://linux-audit.com/"><b>Linux Audit</b></a> - the Linux security blog about Auditing, Hardening and Compliance by Michael Boelen.<br>
  261. &nbsp;&nbsp;:small_orange_diamond: <a href="https://linuxsecurity.expert/"><b>
  262. Linux Security Expert</b></a> - trainings, howtos, checklists, security tools and more.<br>
  263. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.grymoire.com/"><b>The Grymoire</b></a> - collection of useful incantations for wizards, be you computer wizards, magicians, or whatever.<br>
  264. &nbsp;&nbsp;:small_orange_diamond: <a href="https://raymii.org/s/index.html"><b>raymii.org</b></a> - linux/unix sysadmin specializing in building high availability cloud environments.<br>
  265. </p>
  266. #### Systems/Services
  267. ##### :black_small_square: Systems
  268. <p>
  269. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.slackware.com/"><b>Slackware</b></a> - the most "Unix-like" Linux distribution.<br>
  270. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.openbsd.org/"><b>OpenBSD</b></a> - multi-platform 4.4BSD-based UNIX-like operating system.<br>
  271. &nbsp;&nbsp;:small_orange_diamond: <a href="https://hardenedbsd.org/"><b>HardenedBSD</b></a> - HardenedBSD aims to implement innovative exploit mitigation and security solutions.<br>
  272. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.kali.org/"><b>Kali Linux</b></a> - Linux distribution used for Penetration Testing, Ethical Hacking and network security assessments.<br>
  273. &nbsp;&nbsp;:small_orange_diamond: <a href="https://backbox.org/"><b>Backbox Linux</b></a> - penetration test and security assessment oriented Ubuntu-based Linux distribution.<br>
  274. </p>
  275. ##### :black_small_square: Network
  276. <p>
  277. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.capanalysis.net/ca/"><b>CapAnalysis</b></a> - web visual tool to analyze large amounts of captured network traffic (PCAP analyzer).<br>
  278. </p>
  279. ##### :black_small_square: HTTP(s) Services
  280. <p>
  281. &nbsp;&nbsp;:small_orange_diamond: <a href="https://varnish-cache.org/"><b>Varnish HTTP Cache</b></a> - HTTP accelerator designed for content-heavy dynamic web sites.<br>
  282. &nbsp;&nbsp;:small_orange_diamond: <a href="https://varnish-cache.org/"><b>Nginx</b></a> - open source web and reverse proxy server that is similar to Apache, but very light weight.<br>
  283. </p>
  284. ##### :black_small_square: Security/hardening
  285. <p>
  286. &nbsp;&nbsp;:small_orange_diamond: <a href="https://emeraldonion.org/"><b>Emerald Onion</b></a> - seattle-based encrypted-transit internet service provider.<br>
  287. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.unbound.net/"><b>Unbound</b></a> - validating, recursive, and caching DNS resolver (with TLS).<br>
  288. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.knot-resolver.cz/"><b>Knot Resolver</b></a> - caching full resolver implementation, including both a resolver library and a daemon.<br>
  289. &nbsp;&nbsp;:small_orange_diamond: <a href="http://vulnreport.io/"><b>Vulnreport</b></a> - open-source pentesting management and automation platform by Salesforce Product Security.<br>
  290. </p>
  291. #### Awesome Lists
  292. <p>
  293. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/kahun/awesome-sysadmin"><b>Awesome Sysadmin</b></a> - amazingly awesome open source sysadmin resources.<br>
  294. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/alebcay/awesome-shell"><b>Awesome Shell</b></a> - awesome command-line frameworks, toolkits, guides and gizmos.<br>
  295. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/Hack-with-Github/Awesome-Hacking"><b>Awesome Hacking</b></a> - awesome lists for hackers, pentesters and security researchers.<br>
  296. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/vitalysim/Awesome-Hacking-Resources"><b>Awesome Hacking Resources</b></a> - collection of hacking/penetration testing resources to make you better.<br>
  297. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/k4m4/movies-for-hackers"><b>Movies for Hackers</b></a> - list of movies every hacker & cyberpunk must watch.<br>
  298. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/enaqx/awesome-pentest"><b>Awesome Pentest</b></a> - collection of awesome penetration testing resources, tools and other shiny things.<br>
  299. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/caesar0301/awesome-pcaptools"><b>Awesome Pcaptools</b></a> - collection of tools developed by other researchers to process network traces.<br>
  300. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/danielmiessler/SecLists"><b>SecLists</b></a> - collection of multiple types of lists used during security assessments, collected in one place.<br>
  301. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/learnbyexample/Command-line-text-processing"><b>Command-line-text-processing</b></a> - from finding text to search and replace, from sorting to beautifying text and more.<br>
  302. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/binhnguyennus/awesome-scalability"><b>Awesome Scalability</b></a> - best practices in building High Scalability, High Availability, High Stability and more.<br>
  303. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/dhamaniasad/awesome-postgres"><b>Awesome Postgres</b></a> - list of awesome PostgreSQL software, libraries, tools and resources.<br>
  304. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/Hack-with-Github/Free-Security-eBooks"><b>Free Security eBooks</b></a> - list of a Free Security and Hacking eBooks.<br>
  305. </p>
  306. #### Hacking/Penetration testing
  307. ##### :black_small_square: Bounty programs
  308. <p>
  309. &nbsp;&nbsp;:small_orange_diamond: <a href="https://bountyfactory.io/"><b>Bounty Factory</b></a> - European bug bounty platform based on the legislation and rules in force in European countries.<br>
  310. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.openbugbounty.org/"><b>Openbugbounty</b></a> - allows any security researcher reporting a vulnerability on any website.<br>
  311. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.hackerone.com/"><b>hackerone</b></a> - global hacker community to surface the most relevant security issues.<br>
  312. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.bugcrowd.com/"><b>bugcrowd</b></a> - crowdsourced cybersecurity for the enterprise.<br>
  313. &nbsp;&nbsp;:small_orange_diamond: <a href="https://crowdshield.com/"><b>Crowdshield</b></a> - crowdsourced Security & Bug Bounty Management.<br>
  314. </p>
  315. ##### :black_small_square: Web Training Apps (local installation)
  316. <p>
  317. &nbsp;&nbsp;:small_orange_diamond: <a href="https://metasploit.help.rapid7.com/docs/metasploitable-2"><b>Metasploitable 2</b></a> - vulnerable web application amongst security researchers.<br>
  318. &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.dvwa.co.uk/"><b>DVWA</b></a> - PHP/MySQL web application that is damn vulnerable.<br>
  319. &nbsp;&nbsp;:small_orange_diamond: <a href="https://sourceforge.net/projects/mutillidae/"><b>OWASP Mutillidae II</b></a> - free, open source, deliberately vulnerable web-application.<br>
  320. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.owasp.org/index.php/OWASP_Juice_Shop_Project"><b>OWASP Juice Shop Project</b></a> - the most bug-free vulnerable application in existence.<br>
  321. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.owasp.org/index.php/Category:OWASP_WebGoat_Project"><b>OWASP WebGoat Project</b></a> - insecure web application maintained by OWASP designed to teach web app security.<br>
  322. &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/opendns/Security_Ninjas_AppSec_Training"><b>Security Ninjas</b></a> - open source application security training program.<br>
  323. </p>
  324. ##### :black_small_square: Labs
  325. <p>
  326. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.hackthebox.eu/"><b>Hack The Box</b></a> - online platform allowing you to test your penetration testing skills.<br>
  327. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.hacking-lab.com/index.html"><b>Hacking-Lab</b></a> - online ethical hacking, computer network and security challenge platform.<br>
  328. &nbsp;&nbsp;:small_orange_diamond: <a href="http://pwnable.kr/index.php"><b>pwnable.kr</b></a> - non-commercial wargame site which provides various pwn challenges regarding system exploitation.<br>
  329. &nbsp;&nbsp;:small_orange_diamond: <a href="https://silesiasecuritylab.com/"><b>Silesia Security Lab</b></a> - high quality security testing services.<br>
  330. &nbsp;&nbsp;:small_orange_diamond: <a href="https://practicalpentestlabs.com/"><b>Practical Pentest Labs</b></a> - pentest lab, take your Hacking skills to the next level.<br>
  331. &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.root-me.org/?lang=en"><b>Root Me</b></a> - the fast, easy, and affordable way to train your hacking skills.<br>
  332. </p>
  333. #### One-liners
  334. ##### Table of Contents
  335. - **[System](#system)**
  336. * [terminal](#tool-terminal)
  337. * [mount](#tool-mount)
  338. * [fuser](#tool-fuser)
  339. * [ps](#tool-ps)
  340. * [top](#tool-top)
  341. * [strace](#tool-strace)
  342. * [kill](#tool-kill)
  343. * [find](#tool-find)
  344. * [diff](#tool-diff)
  345. * [tail](#tool-tail)
  346. * [cpulimit](#tool-cpulimit)
  347. * [pwdx](#tool-pwdx)
  348. * [tr](#tool-tr)
  349. * [chmod](#tool-chmod)
  350. * [who](#tool-who)
  351. * [screen](#tool-screen)
  352. * [du](#tool-du)
  353. * [inotifywait](#tool-inotifywait)
  354. * [openssl](#tool-openssl)
  355. * [gnutls-cli](#tool-gnutls-cli)
  356. * [secure-delete](#tool-secure-delete)
  357. * [dd](#tool-dd)
  358. - **[HTTP/HTTPS](#http-https)**
  359. * [curl](#tool-curl)
  360. * [httpie](#tool-httpie)
  361. - **[Network](#network)**
  362. * [ssh](#tool-ssh)
  363. * [linux-dev](#tool-linux-dev)
  364. * [tcpdump](#tool-tcpdump)
  365. * [tcpick](#tool-tcpick)
  366. * [ngrep](#tool-ngrep)
  367. * [hping3](#tool-hping3)
  368. * [netcat](#tool-netcat)
  369. * [socat](#tool-socat)
  370. * [lsof](#tool-lsof)
  371. * [netstat](#tool-netstat)
  372. * [rsync](#tool-rsync)
  373. * [host](#tool-host)
  374. * [dig](#tool-dig)
  375. * [network-other](#tool-network-other)
  376. - **[Programming](#programming)**
  377. * [awk](#tool-awk)
  378. * [sed](#tool-sed)
  379. * [grep](#tool-grep)
  380. <a name="system"><b>System</b></a>
  381. ##### Tool: [terminal](https://en.wikipedia.org/wiki/Linux_console)
  382. ###### Reload shell without exit
  383. ```bash
  384. exec $SHELL -l
  385. ```
  386. ###### Close shell keeping all subprocess running
  387. ```bash
  388. disown -a && exit
  389. ```
  390. ###### Exit without saving shell history
  391. ```bash
  392. kill -9 $$
  393. unset HISTFILE && exit
  394. ```
  395. ###### Perform a branching conditional
  396. ```bash
  397. true && { echo success;} || { echo failed; }
  398. ```
  399. ###### Pipe stdout and stderr to separate commands
  400. ```bash
  401. some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)
  402. ```
  403. ###### Redirect stdout and stderr each to separate files and print both to the screen
  404. ```bash
  405. (some_command 2>&1 1>&3 | tee errorlog ) 3>&1 1>&2 | tee stdoutlog
  406. ```
  407. ###### List of commands you use most often
  408. ```bash
  409. history | \
  410. awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | \
  411. grep -v "./" | \
  412. column -c3 -s " " -t | \
  413. sort -nr | nl | head -n 20
  414. ```
  415. ###### Quickly backup a file
  416. ```bash
  417. cp filename{,.orig}
  418. ```
  419. ###### Empty a file (truncate to 0 size)
  420. ```bash
  421. >filename
  422. ```
  423. ###### Delete all files in a folder that don't match a certain file extension
  424. ```bash
  425. rm !(*.foo|*.bar|*.baz)
  426. ```
  427. ###### Pass multi-line string to a file
  428. ```bash
  429. # cat >filename ... - overwrite file
  430. # cat >>filename ... - append to file
  431. cat > filename << __EOF__
  432. data data data
  433. __EOF__
  434. ```
  435. ###### Edit a file on a remote host using vim
  436. ```bash
  437. vim scp://user@host//etc/fstab
  438. ```
  439. ###### Create a directory and change into it at the same time
  440. ```bash
  441. mkd () { mkdir -p "$@" && cd "$@"; }
  442. ```
  443. ###### Convert uppercase files to lowercase files
  444. ```bash
  445. rename 'y/A-Z/a-z/' *
  446. ```
  447. ###### Print a row of characters across the terminal
  448. ```bash
  449. printf "%`tput cols`s" | tr ' ' '#'
  450. ```
  451. ###### Show shell history without line numbers
  452. ```bash
  453. history | cut -c 8-
  454. fc -l -n 1 | sed 's/^\s*//'
  455. ```
  456. ###### Run command(s) after exit session
  457. ```bash
  458. cat > /etc/profile << __EOF__
  459. _after_logout() {
  460. username=$(whoami)
  461. for _pid in $(ps afx | grep sshd | grep "$username" | awk '{print $1}') ; do
  462. kill -9 $_pid
  463. done
  464. }
  465. trap _after_logout EXIT
  466. __EOF__
  467. ```
  468. ###### Generate a sequence of numbers
  469. ```bash
  470. for ((i=1; i<=10; i+=2)) ; do echo $i ; done
  471. # alternative: seq 1 2 10
  472. for ((i=5; i<=10; ++i)) ; do printf '%02d\n' $i ; done
  473. # alternative: seq -w 5 10
  474. ```
  475. ___
  476. ##### Tool: [mount](https://en.wikipedia.org/wiki/Mount_(Unix))
  477. ###### Mount a temporary ram partition
  478. ```bash
  479. mount -t tmpfs tmpfs /mnt -o size=64M
  480. ```
  481. * `-t` - filesystem type
  482. * `-o` - mount options
  483. ###### Remount a filesystem as read/write
  484. ```bash
  485. mount -o remount,rw /
  486. ```
  487. ___
  488. ##### Tool: [fuser](https://en.wikipedia.org/wiki/Fuser_(Unix))
  489. ###### Kills a process that is locking a file
  490. ```bash
  491. fuser -k filename
  492. ```
  493. ###### Show what PID is listening on specific port
  494. ```bash
  495. fuser -v 53/udp
  496. ```
  497. ___
  498. ##### Tool: [ps](https://en.wikipedia.org/wiki/Ps_(Unix))
  499. ###### Show a 4-way scrollable process tree with full details
  500. ```bash
  501. ps awwfux | less -S
  502. ```
  503. ###### Processes per user counter
  504. ```bash
  505. ps hax -o user | sort | uniq -c | sort -r
  506. ```
  507. ___
  508. ##### Tool: [find](https://en.wikipedia.org/wiki/Find_(Unix))
  509. ###### Find files that have been modified on your system in the past 60 minutes
  510. ```bash
  511. find / -mmin 60 -type f
  512. ```
  513. ###### Find all files larger than 20M
  514. ```bash
  515. find / -type f -size +20M
  516. ```
  517. ###### Find duplicate files (based on MD5 hash)
  518. ```bash
  519. find -type f -exec md5sum '{}' ';' | sort | uniq --all-repeated=separate -w 33
  520. ```
  521. ###### Change permission only for files
  522. ```bash
  523. cd /var/www/site && find . -type f -exec chmod 766 {} \;
  524. cd /var/www/site && find . -type f -exec chmod 664 {} +
  525. ```
  526. ###### Change permission only for directories
  527. ```bash
  528. cd /var/www/site && find . -type d -exec chmod g+x {} \;
  529. cd /var/www/site && find . -type d -exec chmod g+rwx {} +
  530. ```
  531. ###### Find files and directories for specific user
  532. ```bash
  533. find . -user <username> -print
  534. ```
  535. ###### Find files and directories for all without specific user
  536. ```bash
  537. find . \!-user <username> -print
  538. ```
  539. ###### Delete older files than 60 days
  540. ```bash
  541. find . -type f -mtime +60 -delete
  542. ```
  543. ###### Recursively remove all empty sub-directories from a directory
  544. ```bash
  545. find . -depth -type d -empty -exec rmdir {} \;
  546. ```
  547. ###### How to find all hard links to a file
  548. ```bash
  549. find </path/to/dir> -xdev -samefile filename
  550. ```
  551. ###### Recursively find the latest modified files
  552. ```bash
  553. find . -type f -exec stat --format '%Y :%y %n' "{}" \; | sort -nr | cut -d: -f2- | head
  554. ```
  555. ___
  556. ##### Tool: [top](https://en.wikipedia.org/wiki/Top_(software))
  557. ###### Use top to monitor only all processes with the specific string
  558. ```bash
  559. top -p $(pgrep -d , <str>)
  560. ```
  561. * `<str>` - process containing str (eg. nginx, worker)
  562. ___
  563. ##### Tool: [strace](https://en.wikipedia.org/wiki/Strace)
  564. ###### Track the open request of a network port
  565. ```bash
  566. strace -f -e trace=bind nc -l 80
  567. ```
  568. ###### Track the open request of a network port (show TCP/UDP)
  569. ```bash
  570. strace -f -e trace=network nc -lu 80
  571. ```
  572. ___
  573. ##### Tool: [kill](https://en.wikipedia.org/wiki/Kill_(command))
  574. ###### Kill a process running on port
  575. ```bash
  576. kill -9 $(lsof -i :<port> | awk '{l=$2} END {print l}')
  577. ```
  578. ___
  579. ##### Tool: [diff](https://en.wikipedia.org/wiki/Diff)
  580. ###### Compare two directory trees
  581. ```bash
  582. diff <(cd directory1 && find | sort) <(cd directory2 && find | sort)
  583. ```
  584. ___
  585. ##### Tool: [tail](https://en.wikipedia.org/wiki/Tail_(Unix))
  586. ###### Annotate tail -f with timestamps
  587. ```bash
  588. tail -f file | while read ; do echo "$(date +%T.%N) $REPLY" ; done
  589. ```
  590. ###### Analyse an Apache access log for the most common IP addresses
  591. ```bash
  592. tail -10000 access_log | awk '{print $1}' | sort | uniq -c | sort -n | tail
  593. ```
  594. ###### Analyse web server log and show only 5xx http codes
  595. ```bash
  596. tail -n 100 -f /path/to/logfile | grep "HTTP/[1-2].[0-1]\" [5]"
  597. ```
  598. ___
  599. ##### Tool: [tar](https://en.wikipedia.org/wiki/Tar_(computing))
  600. ###### System backup with exclude specific directories
  601. ```bash
  602. cd /
  603. tar -czvpf /mnt/system$(date +%d%m%Y%s).tgz --directory=/ \
  604. --exclude=proc/* --exclude=sys/* --exclude=dev/* --exclude=mnt/* .
  605. ```
  606. ###### System backup with exclude specific directories (pigz)
  607. ```bash
  608. cd /
  609. tar cvpf /backup/snapshot-$(date +%d%m%Y%s).tgz --directory=/ \
  610. --exclude=proc/* --exclude=sys/* --exclude=dev/* \
  611. --exclude=mnt/* --exclude=tmp/* --use-compress-program=pigz .
  612. ```
  613. ___
  614. ##### Tool: [dump](https://en.wikipedia.org/wiki/Dump_(program))
  615. ###### System backup to file
  616. ```bash
  617. dump -y -u -f /backup/system$(date +%d%m%Y%s).lzo /
  618. ```
  619. ###### Restore system from lzo file
  620. ```bash
  621. cd /
  622. restore -rf /backup/system$(date +%d%m%Y%s).lzo
  623. ```
  624. ___
  625. ##### Tool: [cpulimit](http://cpulimit.sourceforge.net/)
  626. ###### Limit the cpu usage of a process
  627. ```bash
  628. cpulimit -p pid -l 50
  629. ```
  630. ___
  631. ##### Tool: [pwdx](https://www.cyberciti.biz/faq/unix-linux-pwdx-command-examples-usage-syntax/)
  632. ###### Show current working directory of a process
  633. ```bash
  634. pwdx <pid>
  635. ```
  636. ___
  637. ##### Tool: [taskset](https://www.cyberciti.biz/faq/taskset-cpu-affinity-command/)
  638. ###### Start a command on only one CPU core
  639. ```bash
  640. taskset -c 0 <command>
  641. ```
  642. ___
  643. ##### Tool: [tr](https://en.wikipedia.org/wiki/Tr_(Unix))
  644. ###### Show directories in the PATH, one per line
  645. ```bash
  646. tr : '\n' <<<$PATH
  647. ```
  648. ___
  649. ##### Tool: [chmod](https://en.wikipedia.org/wiki/Chmod)
  650. ###### Remove executable bit from all files in the current directory
  651. ```bash
  652. chmod -R -x+X *
  653. ```
  654. ###### Restore permission for /bin/chmod
  655. ```bash
  656. # 1:
  657. cp /bin/ls chmod.01
  658. cp /bin/chmod chmod.01
  659. ./chmod.01 700 file
  660. # 2:
  661. /bin/busybox chmod 0700 /bin/chmod
  662. # 3:
  663. setfacl --set u::rwx,g::---,o::--- /bin/chmod
  664. ```
  665. ___
  666. ##### Tool: [who](https://en.wikipedia.org/wiki/Who_(Unix))
  667. ###### Find last reboot time
  668. ```bash
  669. who -b
  670. ```
  671. ___
  672. ##### Tool: [screen](https://en.wikipedia.org/wiki/GNU_Screen)
  673. ###### Start screen in detached mode
  674. ```bash
  675. screen -d -m [<command>]
  676. ```
  677. ___
  678. ##### Tool: [du](https://en.wikipedia.org/wiki/GNU_Screen)
  679. ###### Show 20 biggest directories with 'K M G'
  680. ```bash
  681. du | \
  682. sort -r -n | \
  683. awk '{split("K M G",v); s=1; while($1>1024){$1/=1024; s++} print int($1)" "v[s]"\t"$2}' | \
  684. head -n 20
  685. ```
  686. ___
  687. ##### Tool: [inotifywait](https://en.wikipedia.org/wiki/GNU_Screen)
  688. ###### Init tool everytime a file in a directory is modified
  689. ```bash
  690. while true ; do inotifywait -r -e MODIFY dir/ && ls dir/ ; done;
  691. ```
  692. ___
  693. ##### Tool: [openssl](https://www.openssl.org/)
  694. ###### Testing connection to remote host
  695. ```bash
  696. echo | openssl s_client -connect google.com:443 -showcerts
  697. ```
  698. ###### Testing connection to remote host (with SNI support)
  699. ```bash
  700. echo | openssl s_client -showcerts -servername google.com -connect google.com:443
  701. ```
  702. ###### Testing connection to remote host with specific ssl version
  703. ```bash
  704. openssl s_client -tls1_2 -connect google.com:443
  705. ```
  706. ###### Testing connection to remote host with specific ssl cipher
  707. ```bash
  708. openssl s_client -cipher 'AES128-SHA' -connect google.com:443
  709. ```
  710. ###### Generate private key
  711. ```bash
  712. # _ciph: des3, aes
  713. ( _ciph="des3" ; _fd="private.key" ; _len="2048" ; \
  714. openssl genrsa -${_ciph} -out ${_fd} ${_len} )
  715. ```
  716. ###### Remove password from private key
  717. ```bash
  718. ( _fd="private.key" ; _fd_unp="private_unp.key" ; \
  719. openssl rsa -in ${_fd} -out ${_fd_unp} )
  720. ```
  721. ###### Get public key from private key
  722. ```bash
  723. ( _fd="private.key" ; _fd_pub="public.key" ; \
  724. openssl rsa -pubout -in ${_fd} -out ${_fd_pub} )
  725. ```
  726. ###### Generate private key + csr
  727. ```bash
  728. ( _fd="private.key" ; _fd_csr="request.csr" ; _len="2048" ; \
  729. openssl req -out ${_fd_csr} -new -newkey rsa:${_len} -nodes -keyout ${_fd} )
  730. ```
  731. ###### Generate csr
  732. ```bash
  733. ( _fd="private.key" ; _fd_csr="request.csr" ; \
  734. openssl req -out ${_fd_csr} -new -key ${_fd} )
  735. ```
  736. ###### Generate csr (metadata from exist certificate)
  737. ```bash
  738. ( _fd="private.key" ; _fd_csr="request.csr" ; _fd_crt="cert.crt" ; \
  739. openssl x509 -x509toreq -in ${_fd_crt} -out ${_fd_csr} -signkey ${_fd} )
  740. ```
  741. ###### Generate csr with -config param
  742. ```bash
  743. ( _fd="private.key" ; _fd_csr="request.csr" ; \
  744. openssl req -new -sha256 -key ${_fd} -out ${_fd_csr} \
  745. -config <(
  746. cat <<-EOF
  747. [req]
  748. default_bits = 2048
  749. prompt = no
  750. default_md = sha256
  751. req_extensions = req_ext
  752. distinguished_name = dn
  753. [ dn ]
  754. C=<two-letter ISO abbreviation for your country>
  755. ST=<state or province where your organization is legally located>
  756. L=<city where your organization is legally located>
  757. O=<legal name of your organization>
  758. OU=<section of the organization>
  759. CN=<fully qualified domain name>
  760. [ req_ext ]
  761. subjectAltName = @alt_names
  762. [ alt_names ]
  763. DNS.1 = <fully qualified domain name>
  764. DNS.2 = <next domain>
  765. DNS.3 = <next domain>
  766. EOF
  767. ))
  768. ```
  769. ###### Convert DER to PEM
  770. ```bash
  771. ( _fd_der="cert.crt" ; _fd_pem="cert.pem" ; \
  772. openssl x509 -in ${_fd_der} -inform der -outform pem -out ${_fd_pem} )
  773. ```
  774. ###### Convert PEM to DER
  775. ```bash
  776. ( _fd_der="cert.crt" ; _fd_pem="cert.pem" ; \
  777. openssl x509 -in ${_fd_pem} -outform der -out ${_fd_der} )
  778. ```
  779. ###### Checking whether the private key and the certificate match
  780. ```bash
  781. (openssl rsa -noout -modulus -in private.key | openssl md5 ; openssl x509 -noout -modulus -in certificate.crt | openssl md5) | uniq
  782. ```
  783. ___
  784. ##### Tool: [gnutls-cli](https://gnutls.org/manual/html_node/gnutls_002dcli-Invocation.html)
  785. ###### Testing connection to remote host (with SNI support)
  786. ```bash
  787. gnutls-cli -p 443 google.com
  788. ```
  789. ###### Testing connection to remote host (without SNI support)
  790. ```bash
  791. gnutls-cli --disable-sni -p 443 google.com
  792. ```
  793. ___
  794. ##### Tool: [secure-delete](https://wiki.archlinux.org/index.php/Securely_wipe_disk)
  795. ###### Secure delete with shred
  796. ```bash
  797. shred -vfuz -n 10 file
  798. shred --verbose --random-source=/dev/urandom -n 1 /dev/sda
  799. ```
  800. ###### Secure delete with scrub
  801. ```bash
  802. scrub -p dod /dev/sda
  803. scrub -p dod -r file
  804. ```
  805. ###### Secure delete with badblocks
  806. ```bash
  807. badblocks -s -w -t random -v /dev/sda
  808. badblocks -c 10240 -s -w -t random -v /dev/sda
  809. ```
  810. ###### Secure delete with secure-delete
  811. ```bash
  812. srm -vz /tmp/file
  813. sfill -vz /local
  814. sdmem -v
  815. swapoff /dev/sda5 && sswap -vz /dev/sda5
  816. ```
  817. ___
  818. ##### Tool: [dd](https://en.wikipedia.org/wiki/Dd_(Unix))
  819. ###### Show dd status every so often
  820. ```bash
  821. dd <dd_params> status=progress
  822. watch --interval 5 killall -USR1 dd
  823. ```
  824. ###### Redirect output to a file with dd
  825. ```bash
  826. echo "string" | dd of=filename
  827. ```
  828. <a name="http-https"><b>HTTP/HTTPS</b></a>
  829. ##### Tool: [curl](https://curl.haxx.se)
  830. ```bash
  831. curl -Iks https://www.google.com
  832. ```
  833. * `-I` - show response headers only
  834. * `-k` - insecure connection when using ssl
  835. * `-s` - silent mode (not display body)
  836. ```bash
  837. curl -Iks --location -X GET -A "x-agent" https://www.google.com
  838. ```
  839. * `--location` - follow redirects
  840. * `-X` - set method
  841. * `-A` - set user-agent
  842. ```bash
  843. curl -Iks --location -X GET -A "x-agent" --proxy http://127.0.0.1:16379 https://www.google.com
  844. ```
  845. * `--proxy [socks5://|http://]` - set proxy server
  846. ###### Check DNS and HTTP trace with headers for specific domains
  847. ```bash
  848. ### Set domains and external dns servers.
  849. _domain_list=(google.com) ; _dns_list=("8.8.8.8" "1.1.1.1")
  850. for _domain in "${_domain_list[@]}" ; do
  851. printf '=%.0s' {1..48}
  852. echo
  853. printf "[\\e[1;32m+\\e[m] resolve: %s\\n" "$_domain"
  854. for _dns in "${_dns_list[@]}" ; do
  855. # Resolve domain.
  856. host "${_domain}" "${_dns}"
  857. echo
  858. done
  859. for _proto in http https ; do
  860. printf "[\\e[1;32m+\\e[m] trace + headers: %s://%s\\n" "$_proto" "$_domain"
  861. # Get trace and http headers.
  862. curl -Iks -A "x-agent" --location "${_proto}://${_domain}"
  863. echo
  864. done
  865. done
  866. unset _domain_list _dns_list
  867. ```
  868. ___
  869. ##### Tool: [httpie](https://httpie.org/)
  870. ```bash
  871. http -p Hh https://www.google.com
  872. ```
  873. * `-p` - print request and response headers
  874. * `H` - request headers
  875. * `B` - request body
  876. * `h` - response headers
  877. * `b` - response body
  878. ```bash
  879. http -p Hh --follow --max-redirects 5 --verify no https://www.google.com
  880. ```
  881. * `-F, --follow` - follow redirects
  882. * `--max-redirects N` - maximum for `--follow`
  883. * `--verify no` - skip SSL verification
  884. ```bash
  885. http -p Hh --follow --max-redirects 5 --verify no --proxy http:http://127.0.0.1:16379 https://www.google.com
  886. ```
  887. * `--proxy [http:]` - set proxy server
  888. <a name="network"><b>Network</b></a>
  889. ##### Tool: [ssh](https://www.openssh.com/)
  890. ###### Compare a remote file with a local file
  891. ```bash
  892. ssh user@host cat /path/to/remotefile | diff /path/to/localfile -
  893. ```
  894. ###### SSH connection through host in the middle
  895. ```bash
  896. ssh -t reachable_host ssh unreachable_host
  897. ```
  898. ###### Run command over ssh on remote host
  899. ```bash
  900. cat > cmd.txt << __EOF__
  901. cat /etc/hosts
  902. __EOF__
  903. ssh host -l user $(<cmd.txt)
  904. ```
  905. ###### Get public key from private key
  906. ```bash
  907. ssh-keygen -y -f ~/.ssh/id_rsa
  908. ```
  909. ###### Get all fingerprints
  910. ```bash
  911. ssh-keygen -l -f .ssh/known_hosts
  912. ```
  913. ###### Ssh authentication with user password
  914. ```bash
  915. ssh -o PreferredAuthentications=password -o PubkeyAuthentication=no user@remote_host
  916. ```
  917. ###### Ssh authentication with publickey
  918. ```bash
  919. ssh -o PreferredAuthentications=publickey -o PubkeyAuthentication=yes -i id_rsa user@remote_host
  920. ```
  921. ###### Simple recording SSH session
  922. ```bash
  923. function _ssh_sesslog() {
  924. _sesdir="<path/to/session/logs>"
  925. mkdir -p "${_sesdir}" && \
  926. ssh $@ 2>&1 | tee -a "${_sesdir}/$(date +%Y%m%d).log"
  927. }
  928. # Alias:
  929. alias ssh='_ssh_sesslog'
  930. ```
  931. ###### Using Keychain for SSH logins
  932. ```bash
  933. ### Delete all of ssh-agent's keys.
  934. function _scl() {
  935. /usr/bin/keychain --clear
  936. }
  937. ### Add key to keychain.
  938. function _scg() {
  939. /usr/bin/keychain /path/to/private-key
  940. source "$HOME/.keychain/$HOSTNAME-sh"
  941. }
  942. ```
  943. ___
  944. ##### Tool: [linux-dev](https://www.tldp.org/LDP/abs/html/devref1.html)
  945. ###### Testing remote connection to port
  946. ```bash
  947. timeout 1 bash -c "</dev/<proto>/<host>/<port>" >/dev/null 2>&1 ; echo $?
  948. ```
  949. * `<proto` - set protocol (tcp/udp)
  950. * `<host>` - set remote host
  951. * `<port>` - set destination port
  952. ###### Read and write to TCP or UDP sockets with common bash tools
  953. ```bash
  954. exec 5<>/dev/tcp/<host>/<port>; cat <&5 & cat >&5; exec 5>&-
  955. ```
  956. ___
  957. ##### Tool: [tcpdump](http://www.tcpdump.org/)
  958. ```bash
  959. tcpdump -ne -i eth0 -Q in host 192.168.252.1 and port 443
  960. ```
  961. * `-n` - don't convert addresses
  962. * `-e` - print the link-level headers
  963. * `-i [iface|any]` - set interface
  964. * `-Q|-D [in|out|inout]` - choose send/receive direction (`-D` - for old tcpdump versions)
  965. * `host [ip|hostname]` - set host, also `[host not]`
  966. * `[and|or]` - set logic
  967. * `port [1-65535]` - set port number, also `[port not]`
  968. ```bash
  969. tcpdump -ne -i eth0 -Q in host 192.168.252.1 and port 443 -c 5 -w tcpdump.pcap
  970. ```
  971. * `-c [num]` - capture only num number of packets
  972. * `-w [filename]` - write packets to file, `-r [filename]` - reading from file
  973. ___
  974. ##### Tool: [tcpick](http://tcpick.sourceforge.net/)
  975. ###### Analyse packets in real-time
  976. ```bash
  977. while true ; do tcpick -a -C -r dump.pcap ; sleep 2 ; clear ; done
  978. ```
  979. ___
  980. ##### Tool: [ngrep](http://ngrep.sourceforge.net/usage.html)
  981. ```bash
  982. ngrep -d eth0 "www.google.com" port 443
  983. ```
  984. * `-d [iface|any]` - set interface
  985. * `[domain]` - set hostname
  986. * `port [1-65535]` - set port number
  987. ```bash
  988. ngrep -d eth0 "www.google.com" (host 10.240.20.2) and (port 443)
  989. ```
  990. * `(host [ip|hostname])` - filter by ip or hostname
  991. * `(port [1-65535])` - filter by port number
  992. ```bash
  993. ngrep -d eth0 -qt -O ngrep.pcap "www.google.com" port 443
  994. ```
  995. * `-q` - quiet mode (only payloads)
  996. * `-t` - added timestamps
  997. * `-O [filename]` - save output to file, `-I [filename]` - reading from file
  998. ```bash
  999. ngrep -d eth0 -qt 'HTTP' 'tcp'
  1000. ```
  1001. * `HTTP` - show http headers
  1002. * `tcp|udp` - set protocol
  1003. * `[src|dst] host [ip|hostname]` - set direction for specific node
  1004. ```bash
  1005. ngrep -l -q -d eth0 -i "User-Agent: curl*"
  1006. ```
  1007. * `-l` - stdout line buffered
  1008. * `-i` - case-insensitive search
  1009. ___
  1010. ##### Tool: [hping3](http://www.hping.org/)
  1011. ```bash
  1012. hping3 -V -p 80 -s 5050 <scan_type> www.google.com
  1013. ```
  1014. * `-V|--verbose` - verbose mode
  1015. * `-p|--destport` - set destination port
  1016. * `-s|--baseport` - set source port
  1017. * `<scan_type>` - set scan type
  1018. * `-F|--fin` - set FIN flag, port open if no reply
  1019. * `-S|--syn` - set SYN flag
  1020. * `-P|--push` - set PUSH flag
  1021. * `-A|--ack` - set ACK flag (use when ping is blocked, RST response back if the port is open)
  1022. * `-U|--urg` - set URG flag
  1023. * `-Y|--ymas` - set Y unused flag (0x80 - nullscan), port open if no reply
  1024. * `-M 0 -UPF` - set TCP sequence number and scan type (URG+PUSH+FIN), port open if no reply
  1025. ```bash
  1026. hping3 -V -c 1 -1 -C 8 www.google.com
  1027. ```
  1028. * `-c [num]` - packet count
  1029. * `-1` - set ICMP mode
  1030. * `-C|--icmptype [icmp-num]` - set icmp type (default icmp-echo = 8)
  1031. ```bash
  1032. hping3 -V -c 1000000 -d 120 -S -w 64 -p 80 --flood --rand-source <remote_host>
  1033. ```
  1034. * `--flood` - sent packets as fast as possible (don't show replies)
  1035. * `--rand-source` - random source address mode
  1036. * `-d --data` - data size
  1037. * `-w|--win` - winsize (default 64)
  1038. ___
  1039. ##### Tool: [netcat](http://netcat.sourceforge.net/)
  1040. ```bash
  1041. nc -kl 5000
  1042. ```
  1043. * `-l` - listen for an incoming connection
  1044. * `-k` - listening after client has disconnected
  1045. * `>filename.out` - save receive data to file (optional)
  1046. ```bash
  1047. nc 192.168.0.1 5051 < filename.in
  1048. ```
  1049. * `< filename.in` - send data to remote host
  1050. ```bash
  1051. nc -vz 10.240.30.3 5000
  1052. ```
  1053. * `-v` - verbose output
  1054. * `-z` - scan for listening daemons
  1055. ```bash
  1056. nc -vzu 10.240.30.3 1-65535
  1057. ```
  1058. * `-u` - scan only udp ports
  1059. ###### Transfer data file (archive)
  1060. ```bash
  1061. server> nc -l 5000 | tar xzvfp -
  1062. client> tar czvfp - /path/to/dir | nc 10.240.30.3 5000
  1063. ```
  1064. ###### Launch remote shell
  1065. ```bash
  1066. server> nc -l 5000 -e /bin/bash
  1067. client> nc 10.240.30.3 5000
  1068. ```
  1069. ###### Simple file server
  1070. ```bash
  1071. while true ; do nc -l 5000 | tar -xvf - ; done
  1072. ```
  1073. ###### Simple minimal HTTP Server
  1074. ```bash
  1075. while true ; do nc -l -p 1500 -c 'echo -e "HTTP/1.1 200 OK\n\n $(date)"' ; done
  1076. ```
  1077. ###### Simple HTTP Server
  1078. > Restarts web server after each request - remove `while` condition for only single connection.
  1079. ```bash
  1080. cat > index.html << __EOF__
  1081. <!doctype html>
  1082. <head>
  1083. <meta charset="utf-8">
  1084. <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  1085. <title></title>
  1086. <meta name="description" content="">
  1087. <meta name="viewport" content="width=device-width, initial-scale=1">
  1088. </head>
  1089. <body>
  1090. <p>
  1091. Hello! It's a site.
  1092. </p>
  1093. </body>
  1094. </html>
  1095. __EOF__
  1096. ```
  1097. ```bash
  1098. server> while : ; do \
  1099. (echo -ne "HTTP/1.1 200 OK\r\nContent-Length: $(wc -c <index.html)\r\n\r\n" ; cat index.html;) | \
  1100. nc -l -p 5000 \
  1101. ; done
  1102. ```
  1103. * `-p` - port number
  1104. ###### Simple HTTP Proxy (single connection)
  1105. ```bash
  1106. #!/usr/bin/env bash
  1107. if [[ $# != 2 ]] ; then
  1108. printf "%s\\n" \
  1109. "usage: ./nc-proxy listen-port bk_host:bk_port"
  1110. fi
  1111. _listen_port="$1"
  1112. _bk_host=$(echo "$2" | cut -d ":" -f1)
  1113. _bk_port=$(echo "$2" | cut -d ":" -f2)
  1114. printf " lport: %s\\nbk_host: %s\\nbk_port: %s\\n\\n" \
  1115. "$_listen_port" "$_bk_host" "$_bk_port"
  1116. _tmp=$(mktemp -d)
  1117. _back="$_tmp/pipe.back"
  1118. _sent="$_tmp/pipe.sent"
  1119. _recv="$_tmp/pipe.recv"
  1120. trap 'rm -rf "$_tmp"' EXIT
  1121. mkfifo -m 0600 "$_back" "$_sent" "$_recv"
  1122. sed "s/^/=> /" <"$_sent" &
  1123. sed "s/^/<= /" <"$_recv" &
  1124. nc -l -p "$_listen_port" <"$_back" | \
  1125. tee "$_sent" | \
  1126. nc "$_bk_host" "$_bk_port" | \
  1127. tee "$_recv" >"$_back"
  1128. ```
  1129. ```bash
  1130. server> chmod +x nc-proxy && ./nc-proxy 8080 192.168.252.10:8000
  1131. lport: 8080
  1132. bk_host: 192.168.252.10
  1133. bk_port: 8000
  1134. client> http -p h 10.240.30.3:8080
  1135. HTTP/1.1 200 OK
  1136. Accept-Ranges: bytes
  1137. Cache-Control: max-age=31536000
  1138. Content-Length: 2748
  1139. Content-Type: text/html; charset=utf-8
  1140. Date: Sun, 01 Jul 2018 20:12:08 GMT
  1141. Last-Modified: Sun, 01 Apr 2018 21:53:37 GMT
  1142. ```
  1143. ###### Create a single-use TCP or UDP proxy
  1144. ```bash
  1145. ### TCP -> TCP
  1146. nc -l -p 2000 -c "nc [ip|hostname] 3000"
  1147. ### TCP -> UDP
  1148. nc -l -p 2000 -c "nc -u [ip|hostname] 3000"
  1149. ### UDP -> UDP
  1150. nc -l -u -p 2000 -c "nc -u [ip|hostname] 3000"
  1151. ### UDP -> TCP
  1152. nc -l -u -p 2000 -c "nc [ip|hostname] 3000"
  1153. ```
  1154. ___
  1155. ##### Tool: [socat](http://www.dest-unreach.org/socat/doc/socat.html/)
  1156. ###### Testing remote connection to port
  1157. ```bash
  1158. socat - TCP4:10.240.30.3:22
  1159. ```
  1160. * `-` - standard input (STDIO)
  1161. * `TCP4:<params>` - set tcp4 connection with specific params
  1162. * `[hostname|ip]` - set hostname/ip
  1163. * `[1-65535]` - set port number
  1164. ###### Redirecting TCP-traffic to a UNIX domain socket under Linux
  1165. ```bash
  1166. socat TCP-LISTEN:1234,bind=127.0.0.1,reuseaddr,fork,su=nobody,range=127.0.0.0/8 UNIX-CLIENT:/tmp/foo
  1167. ```
  1168. * `TCP-LISTEN:<params>` - set tcp listen with specific params
  1169. * `[1-65535]` - set port number
  1170. * `bind=[hostname|ip]` - set bind hostname/ip
  1171. * `reuseaddr` - allows other sockets to bind to an address
  1172. * `fork` - keeps the parent process attempting to produce more connections
  1173. * `su=nobody` - set user
  1174. * `range=[ip-range]` - ip range
  1175. * `UNIX-CLIENT:<params>` - communicates with the specified peer socket
  1176. * `filename` - define socket
  1177. ___
  1178. ##### Tool: [lsof](https://en.wikipedia.org/wiki/Lsof)
  1179. ###### Show process that use internet connection at the moment
  1180. ```bash
  1181. lsof -P -i -n
  1182. ```
  1183. ###### Show process that use specific port number
  1184. ```bash
  1185. lsof -i tcp:443
  1186. ```
  1187. ###### Lists all listening ports together with the PID of the associated process
  1188. ```bash
  1189. lsof -Pan -i tcp -i udp
  1190. ```
  1191. ###### List all open ports and their owning executables
  1192. ```bash
  1193. lsof -i -P | grep -i "listen"
  1194. ```
  1195. ###### Show all open ports
  1196. ```bash
  1197. lsof -Pnl -i
  1198. ```
  1199. ###### Show open ports (LISTEN)
  1200. ```bash
  1201. lsof -Pni4 | grep LISTEN | column -t
  1202. ```
  1203. ###### List all files opened by a particular command
  1204. ```bash
  1205. lsof -c "process"
  1206. ```
  1207. ###### View user activity per directory
  1208. ```bash
  1209. lsof -u username -a +D /etc
  1210. ```
  1211. ###### Show 10 Largest Open Files
  1212. ```bash
  1213. lsof / | \
  1214. awk '{ if($7 > 1048576) print $7/1048576 "MB" " " $9 " " $1 }' | \
  1215. sort -n -u | tail | column -t
  1216. ```
  1217. ___
  1218. ##### Tool: [netstat](https://en.wikipedia.org/wiki/Netstat)
  1219. ###### Graph # of connections for each hosts
  1220. ```bash
  1221. netstat -an | \
  1222. grep ESTABLISHED | \
  1223. awk '{print $5}' | \
  1224. awk -F: '{print $1}' | \
  1225. grep -v -e '^[[:space:]]*$' | \
  1226. sort | uniq -c | \
  1227. awk '{ printf("%s\t%s\t",$2,$1) ; for (i = 0; i < $1; i++) {printf("*")}; print "" }'
  1228. ```
  1229. ###### Monitor open connections for specific port including listen, count and sort it per IP
  1230. ```bash
  1231. watch "netstat -plan | grep :443 | awk {'print \$5'} | cut -d: -f 1 | sort | uniq -c | sort -nk 1"
  1232. ```
  1233. ___
  1234. ##### Tool: [rsync](https://en.wikipedia.org/wiki/Rsync)
  1235. ###### Rsync remote data as root using sudo
  1236. ```bash
  1237. rsync --rsync-path 'sudo rsync' username@hostname:/path/to/dir/ /local/
  1238. ```
  1239. ___
  1240. ##### Tool: [host](https://en.wikipedia.org/wiki/Host_(Unix))
  1241. ###### Resolves the domain name (using external dns server)
  1242. ```bash
  1243. host google.com 9.9.9.9
  1244. ```
  1245. ###### Checks the domain administrator (SOA record)
  1246. ```bash
  1247. host -t soa google.com 9.9.9.9
  1248. ```
  1249. ___
  1250. ##### Tool: [dig](https://en.wikipedia.org/wiki/Dig_(command))
  1251. ###### Resolves the domain name (short output)
  1252. ```bash
  1253. dig google.com +short
  1254. ```
  1255. ###### Lookup NS record for specific domain
  1256. ```bash
  1257. dig @9.9.9.9 google.com NS
  1258. ```
  1259. ###### Query only answer section
  1260. ```bash
  1261. dig google.com +nocomments +noquestion +noauthority +noadditional +nostats
  1262. ```
  1263. ###### Query ALL DNS Records
  1264. ```bash
  1265. dig google.com ANY +noall +answer
  1266. ```
  1267. ###### DNS Reverse Look-up
  1268. ```bash
  1269. dig -x 172.217.16.14 +short
  1270. ```
  1271. ___
  1272. ##### Tool: [network-other](https://github.com/trimstray/awesome-ninja-admins#tool-network-other)
  1273. ###### Get all subnets for specific AS (Autonomous system)
  1274. ```bash
  1275. AS="AS32934"
  1276. whois -h whois.radb.net -- "-i origin ${AS}" | \
  1277. grep "^route:" | \
  1278. cut -d ":" -f2 | \
  1279. sed -e 's/^[ \t]//' | \
  1280. sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4 | \
  1281. cut -d ":" -f2 | \
  1282. sed -e 's/^[ \t]/allow /' | \
  1283. sed 's/$/;/' | \
  1284. sed 's/allow */subnet -> /g'
  1285. ```
  1286. ###### Resolves domain name from dns.google.com with curl and jq
  1287. ```bash
  1288. _dname="google.com" ; curl -s "https://dns.google.com/resolve?name=${_dname}&type=A" | jq .
  1289. ```
  1290. <a name="programming"><b>Programming</b></a>
  1291. ##### Tool: [awk](http://www.grymoire.com/Unix/Awk.html)
  1292. ###### Remove duplicate entries in a file without sorting
  1293. ```bash
  1294. awk '!x[$0]++' filename
  1295. ```
  1296. ###### Exclude multiple columns using AWK
  1297. ```bash
  1298. awk '{$1=$3=""}1' filename
  1299. ```
  1300. ___
  1301. ##### Tool: [sed](http://www.grymoire.com/Unix/Sed.html)
  1302. ###### To print a specific line from a file
  1303. ```bash
  1304. sed -n 10p /path/to/file
  1305. ```
  1306. ###### Remove a specific line from a file
  1307. ```bash
  1308. sed -i 10d /path/to/file
  1309. # alternative (BSD): sed -i'' 10d /path/to/file
  1310. ```
  1311. ###### Remove a range of lines from a file
  1312. ```bash
  1313. sed -i <file> -re '<start>,<end>d'
  1314. ```
  1315. ___
  1316. ##### Tool: [grep](http://www.grymoire.com/Unix/Grep.html)
  1317. ###### Search for a "pattern" inside all files in the current directory
  1318. ```bash
  1319. grep -rn "pattern"
  1320. grep -RnisI "pattern" *
  1321. fgrep "pattern" * -R
  1322. ```
  1323. ###### Remove blank lines from a file and save output to new file
  1324. ```bash
  1325. grep . filename > newfilename
  1326. ```
  1327. ###### Except multiple patterns
  1328. ```bash
  1329. grep -vE '(error|critical|warning)' filename
  1330. ```
  1331. ###### Show data from file without comments
  1332. ```bash
  1333. grep -v ^[[:space:]]*# filename
  1334. ```
  1335. ###### Show data from file without comments and new lines
  1336. ```bash
  1337. egrep -v '#|^$' filename
  1338. ```