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README.md

Master


A collection of awesome lists, manuals, blogs, hacks, one-liners and tools for Awesome Ninja Admins.


Branch Awesome Status License

Created by trimstray and contributors


Who is Ninja Admins?

  • race of pure evil who rule the network through a monarchistic feudelic system
  • they never opened the door for strangers (or anyone at all)
  • they know very nasty piece of code like a fork bombs
  • they can make dd is not a disk destroyer
  • they know that #!/usr/bin/env bash superior to #!/bin/bash
  • they know that su - logs in completely as root
  • they love the old admin nix-world

Ninja Admins Collection

CLI Tools

▪️ Shells

  🔸 Oh My ZSH! - the best framework for managing your Zsh configuration.
  🔸 bash-it - a community Bash framework.

▪️ Managers

  🔸 Midnight Commander - visual file manager, licensed under GNU General Public License.
  🔸 screen - full-screen window manager that multiplexes a physical terminal.
  🔸 tmux - terminal multiplexer, lets you switch easily between several programs in one terminal.

▪️ Network

  🔸 Curl - command line tool and library for transferring data with URLs.
  🔸 HTTPie - a user-friendly HTTP client.
  🔸 gnutls-cli - client program to set up a TLS connection to some other computer.
  🔸 netcat - networking utility which reads and writes data across network connections, using the TCP/IP protocol.
  🔸 tcpdump - powerful command-line packet analyzer.

▪️ Databases

  🔸 pgcli - postgres CLI with autocompletion and syntax highlighting.

Web Tools

▪️ SSL

  🔸 SSL Server Test - free online service performs a deep analysis of the configuration of any SSL web server.
  🔸 SSL Server Test (DEV) - free online service performs a deep analysis of the configuration of any SSL web server.
  🔸 ImmuniWeb® SSLScan - test SSL/TLS (PCI DSS, HIPAA and NIST).
  🔸 Report URI - monitoring security policies like CSP and HPKP.
  🔸 CSP Evaluator - allows developers and security experts to check if a Content Security Policy.
  🔸 Common CA Database - repository of information about CAs, and their root and intermediate certificates.
  🔸 CERTSTREAM - real-time certificate transparency log update stream.

▪️ HTTP Headers

  🔸 Security Headers - analyse the HTTP response headers (with rating system to the results).
  🔸 Observatory by Mozilla - set of tools to analyze your website.

▪️ DNS

  🔸 ViewDNS - one source for free DNS related tools and information.
  🔸 DNS Spy - monitor, validate and verify your DNS configurations.
  🔸 DNSlytics - online investigation tool.

▪️ Mail

  🔸 MX Toolbox - all of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.

▪️ Mass scanners (search engines)

  🔸 Censys - platform that helps information security practitioners discover, monitor, and analyze devices.
  🔸 Shodan - the world's first search engine for Internet-connected devices.
  🔸 GreyNoise - mass scanner (such as Shodan and Censys).
  🔸 Hardenize - deploy the security standards.

▪️ Net-tools

  🔸 Netcraft - detailed report about the site, helping you to make informed choices about their integrity.
  🔸 Security Trails - APIs for Security Companies, Researchers and Teams.
  🔸 Online Curl - curl test, analyze HTTP Response Headers.
  🔸 Ping.eu - online Ping, Traceroute, DNS lookup, WHOIS and others.
  🔸 Network-Tools - network tools for webmasters, IT technicians & geeks.
  🔸 URL Encode/Decode - tool from above to either encode or decode a string of text.

▪️ Performance

  🔸 GTmetrix - analyze your site’s speed and make it faster.
  🔸 Sucuri loadtimetester - test here the performance of any of your sites from across the globe.

▪️ Passwords

  🔸 Random.org - generate random passwords.
  🔸 Gotcha? - list of 1.4 billion accounts circulates around the Internet.
  🔸 have i been pwned? - check if you have an account that has been compromised in a data breach.

Manuals/Howtos/Tutorials

▪️ Bash

  🔸 pure-bash-bible - a collection of pure bash alternatives to external processes.
  🔸 The Bash Hackers Wiki - hold documentation of any kind about GNU Bash.

▪️ Unix tutorials

  🔸 nixCraft - linux and unix tutorials for new and seasoned sysadmin.
  🔸 TecMint - the ideal Linux blog for Sysadmins & Geeks.

▪️ Hacking

  🔸 Hacking Articles - LRaj Chandel's Security & Hacking Blog.

Blogs

  🔸 Brendan Gregg's Blog - Brendan Gregg is an industry expert in computing performance and cloud computing.
  🔸 Gynvael "GynDream" Coldwind - Gynvael is a IT security engineer at Google.
  🔸 Michał "lcamtuf" Zalewski - "white hat" hacker, computer security expert.
  🔸 Mattias Geniar - developer, Sysadmin, Blogger, Podcaster and Public Speaker.
  🔸 Nick Craver - Software Developer and Systems Administrator for Stack Exchange.
  🔸 Robert Penz - IT security Expert.
  🔸 Scott Helme - Security Researcher, international speaker and founder of securityheaders.com and report-uri.com.
  🔸 Kacper Szurek - Detection Engineer at ESET.
  🔸 Troy Hunt - Microsoft Regional Director and Microsoft Most Valuable Professional for Developer Security.

Systems/Services

▪️ Systems

  🔸 OpenBSD - multi-platform 4.4BSD-based UNIX-like operating system.
  🔸 HardenedBSD - HardenedBSD aims to implement innovative exploit mitigation and security solutions.

▪️ HTTP(s) Services

  🔸 Varnish HTTP Cache - HTTP accelerator designed for content-heavy dynamic web sites.

▪️ Security/hardening

  🔸 Emerald Onion - Seattle-based encrypted-transit internet service provider.

Lists

  🔸 Awesome Sysadmin - amazingly awesome open source sysadmin resources.
  🔸 Awesome Shell - awesome command-line frameworks, toolkits, guides and gizmos.
  🔸 Awesome-Hacking - awesome lists for hackers, pentesters and security researchers.

Hacking/Penetration testing

▪️ Bounty programs

  🔸 Openbugbounty - allows any security researcher reporting a vulnerability on any website.
  🔸 hackerone - global hacker community to surface the most relevant security issues.
  🔸 bugcrowd - crowdsourced cybersecurity for the enterprise.
  🔸 Crowdshield - crowdsourced Security & Bug Bounty Management.

▪️ Web Training Apps

  🔸 DVWA - PHP/MySQL web application that is damn vulnerable.
  🔸 OWASP Mutillidae II - free, open source, deliberately vulnerable web-application.
  🔸 OWASP Juice Shop Project - the most bug-free vulnerable application in existence.
  🔸 OWASP WebGoat Project - insecure web application maintained by OWASP designed to teach web app security.
  🔸 Security Ninjas - open source application security training program.

One-liners

Table of Contents

System

Tool: terminal
Close shell keeping all subprocess running
disown -a && exit
Exit without saving shell history
kill -9 $$
Pipe stdout and stderr to separate commands
some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)
List of commands you use most often
history | awk '{ a[$2]++ } END { for(i in a) { print a[i] " " i } }' | sort -rn | head
Quickly backup a file
cp filename{,.orig}
Delete all files in a folder that don’t match a certain file extension
rm !(*.foo|*.bar|*.baz)
Edit a file on a remote host using vim
vim scp://user@host//etc/fstab

Create a directory and change into it at the same time
mkd () { mkdir -p "$@" && cd "$@"; }
Tool: mount
Mount a temporary ram partition
mount -t tmpfs tmpfs /mnt -o size=64M
  • -t - filesystem type
  • -o - mount options

Tool: fuser
Kills a process that is locking a file
fuser -k filename

Tool: ps
Show a 4-way scrollable process tree with full details
ps awwfux | less -S

Tool: find
Find files that have been modified on your system in the past 60 minutes
find / -mmin 60 -type f
Find all files larger than 20M
find / -type f -size +20M

Tool: diff
Compare two directory trees
diff <(cd directory1 && find | sort) <(cd directory2 && find | sort)

HTTP/HTTPS

Tool: curl
curl -Iks https://www.google.com
  • -I - show response headers only
  • -k - insecure connection when using ssl
  • -s - silent mode (not display body)
curl -Iks --location -X GET -A "x-agent" https://www.google.com
  • --location - follow redirects
  • -X - set method
  • -A - set user-agent
curl -Iks --location -X GET -A "x-agent" --proxy http://127.0.0.1:16379 https://www.google.com
  • --proxy [socks5://|http://] - set proxy server

Tool: httpie
http -p Hh https://www.google.com
  • -p - print request and response headers
    • H - request headers
    • B - request body
    • h - response headers
    • b - response body
http -p Hh --follow --max-redirects 5 --verify no https://www.google.com
  • -F, --follow - follow redirects
  • --max-redirects N - maximum for --follow
  • --verify no - skip SSL verification
http -p Hh --follow --max-redirects 5 --verify no --proxy http:http://127.0.0.1:16379 https://www.google.com
  • --proxy [http:] - set proxy server

Network

Tool: openssh
Compare a remote file with a local file
ssh user@host cat /path/to/remotefile | diff /path/to/localfile -
SSH connection through host in the middle
ssh -t reachable_host ssh unreachable_host
Run command over ssh on remote host
cat > cmd.txt << __EOF__
cat /etc/hosts
__EOF__

ssh host -l user $(<cmd.txt)

Tool: linux-dev
Testing remote connection to port
timeout 1 bash -c "</dev/tcp/<host>/<port>" >/dev/null 2>&1 ; echo $?
  • <host> - set remote host
  • <port> - set destination port

Tool: tcpdump
tcpdump -ne -i eth0 -Q in host 192.168.252.1 and port 443
  • -n - don’t convert addresses
  • -e - print the link-level headers
  • -i [iface] - set interface
  • -Q|-D [in|out|inout] - choose send/receive direction (-D - for old tcpdump versions)
  • host [ip|hostname] - set host, also [host not]
  • [and|or] - set logic
  • port [1-65535] - set port number, also [port not]
tcpdump -ne -i eth0 -Q in host 192.168.252.1 and port 443 -c 5 -w tcpdump.pcap
  • -c [num] - capture only num number of packets
  • -w [filename] - write packets to file, -r [filename] - reading from file

Tool: ngrep
ngrep -d eth0 "www.google.com" port 443
  • -d [iface|any] - set interface
  • [domain] - set hostname
  • port [1-65535] - set port number
ngrep -d eth0 "www.google.com" (host 10.240.20.2) and (port 443)
  • (host [ip|hostname]) - filter by ip or hostname
  • (port [1-65535]) - filter by port number
ngrep -d eth0 -qt -O ngrep.pcap "www.google.com" port 443
  • -q - quiet mode (only payloads)
  • -t - added timestamps
  • -O [filename] - save output to file, -I [filename] - reading from file
ngrep -d eth0 -qt 'HTTP' 'tcp'
  • HTTP - show http headers
  • tcp|udp - set protocol
  • [src|dst] host [ip|hostname] - set direction for specific node

Tool: hping3
hping3 -V -p 80 -s 5050 <scan_type> www.google.com
  • -V|--verbose - verbose mode
  • -p|--destport - set destination port
  • -s|--baseport - set source port
  • <scan_type> - set scan type
    • -F|--fin - set FIN flag, port open if no reply
    • -S|--syn - set SYN flag
    • -P|--push - set PUSH flag
    • -A|--ack - set ACK flag (use when ping is blocked, RST response back if the port is open)
    • -U|--urg - set URG flag
    • -Y|--ymas - set Y unused flag (0x80 - nullscan), port open if no reply
    • -M 0 -UPF - set TCP sequence number and scan type (URG+PUSH+FIN), port open if no reply
hping3 -V -c 1 -1 -C 8 www.google.com
  • -c [num] - packet count
  • -1 - set ICMP mode
  • -C|--icmptype [icmp-num] - set icmp type (default icmp-echo = 8)
hping3 -V -c 1000000 -d 120 -S -w 64 -p 80 --flood --rand-source <remote_host>
  • --flood - sent packets as fast as possible (don’t show replies)
  • --rand-source - random source address mode
  • -d --data - data size
  • -w|--win - winsize (default 64)

Tool: netcat
nc -kl 5000
  • -l - listen for an incoming connection
  • -k - listening after client has disconnected
  • >filename.out - save receive data to file (optional)
nc 192.168.0.1 5051 < filename.in
  • < filename.in - send data to remote host
nc -vz 10.240.30.3 5000
  • -v - verbose output
  • -z - scan for listening daemons
nc -vzu 10.240.30.3 1-65535
  • -u - scan only udp ports
Transfer data file (archive)
server> nc -l 5000 | tar xzvfp -
client> tar czvfp - /path/to/dir | nc 10.240.30.3 5000
Launch remote shell
server> nc -l 5000 -e /bin/bash
client> nc 10.240.30.3 5000
Simple HTTP Server

Restarts web server after each request - remove while condition for only single connection.

cat > index.html << __EOF__
<!doctype html>
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
        <title></title>
        <meta name="description" content="">
        <meta name="viewport" content="width=device-width, initial-scale=1">
    </head>
    <body>

    <p>

      Hello! It's a site.

    </p>

    </body>
</html>
__EOF__
server> while : ; do \
(echo -ne "HTTP/1.1 200 OK\r\nContent-Length: $(wc -c <index.html)\r\n\r\n" ; cat index.html;) \
| nc -l -p 5000 \
; done
  • -p - port number
Simple HTTP Proxy (single connection)
#!/usr/bin/env bash

if [[ $# != 2 ]] ; then
  printf "%s\\n" \
         "usage: ./nc-proxy listen-port bk_host:bk_port"
fi

_listen_port="$1"
_bk_host=$(echo "$2" | cut -d ":" -f1)
_bk_port=$(echo "$2" | cut -d ":" -f2)

printf "  lport: %s\\nbk_host: %s\\nbk_port: %s\\n\\n" \
       "$_listen_port" "$_bk_host" "$_bk_port"

_tmp=$(mktemp -d)
_back="$_tmp/pipe.back"
_sent="$_tmp/pipe.sent"
_recv="$_tmp/pipe.recv"

trap 'rm -rf "$_tmp"' EXIT

mkfifo -m 0600 "$_back" "$_sent" "$_recv"

sed "s/^/=> /" <"$_sent" &
sed "s/^/<=  /" <"$_recv" &
nc -l -p "$_listen_port" <"$_back" \
  | tee "$_sent" \
  | nc "$_bk_host" "$_bk_port" \
  | tee "$_recv" >"$_back"
server> chmod +x nc-proxy && ./nc-proxy 8080 192.168.252.10:8000
  lport: 8080
bk_host: 192.168.252.10
bk_port: 8000

client> http -p h 10.240.30.3:8080
HTTP/1.1 200 OK
Accept-Ranges: bytes
Cache-Control: max-age=31536000
Content-Length: 2748
Content-Type: text/html; charset=utf-8
Date: Sun, 01 Jul 2018 20:12:08 GMT
Last-Modified: Sun, 01 Apr 2018 21:53:37 GMT

Tool: socat
Testing remote connection to port
socat - TCP4:10.240.30.3:22
  • - - standard input (STDIO)
  • TCP4:<params> - set tcp4 connection with specific params
    • [hostname|ip] - set hostname/ip
    • [1-65535] - set port number
Redirecting TCP-traffic to a UNIX domain socket under Linux
socat TCP-LISTEN:1234,bind=127.0.0.1,reuseaddr,fork,su=nobody,range=127.0.0.0/8 UNIX-CLIENT:/tmp/foo
  • TCP-LISTEN:<params> - set tcp listen with specific params
    • [1-65535] - set port number
    • bind=[hostname|ip] - set bind hostname/ip
    • reuseaddr - allows other sockets to bind to an address
    • fork - keeps the parent process attempting to produce more connections
    • su=nobody - set user
    • range=[ip-range] - ip range
  • UNIX-CLIENT:<params> - communicates with the specified peer socket
    • filename - define socket

Tool: lsof
Show process that use internet connection at the moment
lsof -P -i -n
Show process that use specific port number
lsof -i tcp:443
Lists all listening ports together with the PID of the associated process
lsof -Pan -i tcp -i udp

Tool: netstat

Graph # of connections for each hosts
netstat -an | grep ESTABLISHED | awk '{print $5}' | awk -F: '{print $1}' | grep -v -e '^[[:space:]]*$' | sort | uniq -c | awk '{ printf("%s\t%s\t",$2,$1) ; for (i = 0; i < $1; i++) {printf("*")}; print "" }'

Programming

Tool: awk
Remove duplicate entries in a file without sorting
awk '!x[$0]++' filename
Exclude multiple columns using AWK
awk '{$1=$3=""}1' filename

Tool: sed
To print a specific line from a file
sed -n 10p /path/to/file
Remove a specific line from a file
sed -i 10d /path/to/file

Tool: grep
Search for a “pattern” inside all files in the current directory
grep -RnisI "pattern" *
fgrep "pattern" * -R
Remove blank lines from a file and save output to new file
grep . filename > newfilename