InternetServicesBook/README.md

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<p align="center">"<i>Knowledge is powerful, be careful how you use it!</i>"</p>

<h4 align="center">A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more.</h4>

<br>

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  <sub>Created by
  <a href="https://twitter.com/trimstray">trimstray</a> and
  <a href="https://github.com/trimstray/the-book-of-secret-knowledge/graphs/contributors">contributors</a>
</div>

<br>

***

## :notebook_with_decorative_cover: &nbsp;What is it?

This list is a collection of various materials and tools that I use every day in my work. It contains a lot of useful information gathered in one piece.

## :restroom: &nbsp;For whom?

This collection is suitable for everyone. It is aimed towards System and Network administrators, DevOps, Pentesters and Security Researchers.

## :information_source: &nbsp;Contributing

If you find something which doesn't make sense, or something doesn't seem right, please make a pull request and please add valid and well-reasoned explanations about your changes or comments.

A few simple rules for this project:

- inviting and clear
- not tiring
- useful

These below rules may be better:

- easy to contribute to (Markdown + HTML ...)
- easy to find (simple TOC, maybe it's worth extending them?)

Url marked **\*** is temporary unavailable. Please don't delete it without confirming that it has permanently expired.

Before adding a pull request, please see the **[contributing guidelines](CONTRIBUTING.md)**. All **suggestions/PR** are welcome!

## :gift_heart: &nbsp;Support

If this project is useful and important for you or if you really like _the-book-of-secret-knowledge_, you can bring **positive energy** by giving some **good words** or **supporting this project**. Thank you!

## :ballot_box_with_check: &nbsp;ToDo

- [ ] Add new stuff...
- [ ] Add useful shell functions
- [ ] Add one-liners for collection tools (eg. CLI Tools)
- [ ] Sort order in lists

## :anger: &nbsp;Table of Contents

Only main chapters:

- **[CLI Tools](#cli-tools-toc)**
- **[GUI Tools](#gui-tools-toc)**
- **[Web Tools](#web-tools-toc)**
- **[Systems/Services](#systemsservices-toc)**
- **[Networks](#networks-toc)**
- **[Containers/Orchestration](#containersorchestration-toc)**
- **[Manuals/Howtos/Tutorials](#manualshowtostutorials-toc)**
- **[Inspiring Lists](#inspiring-lists-toc)**
- **[Blogs/Podcasts/Videos](#blogspodcastsvideos-toc)**
- **[Hacking/Penetration Testing](#hackingpenetration-testing-toc)**
- **[Your daily knowledge and news](#your-daily-knowledge-and-news-toc)**
- **[Other Cheat Sheets](#other-cheat-sheets-toc)**
- **[One-liners](#one-liners-toc)**
- **[Shell functions](#shell-functions-toc)**

## :trident: &nbsp;The Book of Secret Knowledge (Chapters)

#### CLI Tools &nbsp;[<sup>[TOC]</sup>](#anger-table-of-contents)

##### :black_small_square: Shells

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.gnu.org/software/bash/"><b>GNU Bash</b></a> - is an sh-compatible shell that incorporates useful features from the Korn shell and C shell.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.zsh.org/"><b>Zsh</b></a> - is a shell designed for interactive use, although it is also a powerful scripting language.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://tcl-lang.org/"><b>tclsh</b></a> - is a very powerful cross-platform shell, suitable for a huge range of uses.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/Bash-it/bash-it"><b>bash-it</b></a> - is a framework for using, developing and maintaining shell scripts and custom commands.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://ohmyz.sh/"><b>Oh My ZSH!</b></a> - is the best framework for managing your Zsh configuration.<br>
&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>
</p>

##### :black_small_square: Managers

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://midnight-commander.org/"><b>Midnight Commander</b></a> - is a visual file manager, licensed under GNU General Public License.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/ranger/ranger"><b>ranger</b></a> - is a VIM-inspired filemanager for the console.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/jarun/nnn"><b>nnn</b></a> - is a tiny, lightning fast, feature-packed file manager.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.gnu.org/software/screen/"><b>screen</b></a> - is a full-screen window manager that multiplexes a physical terminal.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/tmux/tmux/wiki"><b>tmux</b></a> - is a terminal multiplexer, lets you switch easily between several programs in one terminal.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/peikk0/tmux-cssh"><b>tmux-cssh</b></a> - is a tool to set comfortable and easy to use functionality, clustering and synchronizing tmux-sessions.<br>
</p>

##### :black_small_square: Text editors

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://ex-vi.sourceforge.net/"><b>vi</b></a> - is one of the most common text editors on Unix.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.vim.org/"><b>vim</b></a> - is a highly configurable text editor.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.gnu.org/software/emacs/"><b>emacs</b></a> - is an extensible, customizable, free/libre text editor - and more.<br>
</p>

##### :black_small_square: Files and directories

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/sharkdp/fd"><b>fd</b></a> - is a simple, fast and user-friendly alternative to find.<br>
</p>

##### :black_small_square: Network

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.putty.org/"><b>PuTTY</b></a> - is an SSH and telnet client, developed originally by Simon Tatham.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://nmap.org/"><b>nmap</b></a> - is a free and open source (license) utility for network discovery and security auditing.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/robertdavidgraham/masscan"><b>masscan</b></a> - is the fastest Internet port scanner, spews SYN packets asynchronously.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/gvb84/pbscan"><b>pbscan</b></a> - is a faster and more efficient stateless SYN scanner and banner grabber.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://www.hping.org/"><b>hping</b></a> - is a command-line oriented TCP/IP packet assembler/analyzer.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/traviscross/mtr"><b>mtr</b></a> - is a tool that combines the functionality of the 'traceroute' and 'ping' programs in a single network diagnostic tool.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/mehrdadrad/mylg"><b>mylg</b></a> - is an open source utility which combines the functions of the different network probes in one diagnostic tool.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://netcat.sourceforge.net/"><b>netcat</b></a> - is a networking utility which reads and writes data across network connections, using the TCP/IP protocol.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.tcpdump.org/"><b>tcpdump</b></a> - is a powerful command-line packet analyzer.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.wireshark.org/docs/man-pages/tshark.html"><b>tshark</b></a> - is a tool that allows us to dump and analyze network traffic (wireshark cli).<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://termshark.io/"><b>Termshark</b></a> - is a simple terminal user-interface for tshark.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/jpr5/ngrep"><b>ngrep</b></a> - is like GNU grep applied to the network layer.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/mechpen/sockdump"><b>sockdump</b></a> - dump unix domain socket traffic.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/google/stenographer"><b>stenographer</b></a> - is a packet capture solution which aims to quickly spool all packets to disk.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/sachaos/tcpterm"><b>tcpterm</b></a> - visualize packets in TUI.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/tgraf/bmon"><b>bmon</b></a> - is a monitoring and debugging tool to capture networking related statistics and prepare them visually.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://iptraf.seul.org/2.6/manual.html#installation"><b>iptraf-ng</b></a> - is a console-based network monitoring program for Linux that displays information about IP traffic.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://iperf.fr/"><b>iPerf3</b></a> - is a tool for active measurements of the maximum achievable bandwidth on IP networks.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/Microsoft/Ethr"><b>ethr</b></a> - is a Network Performance Measurement Tool for TCP, UDP & HTTP.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/jwbensley/Etherate"><b>Etherate</b></a> - is a Linux CLI based Ethernet and MPLS traffic testing tool.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/mpolden/echoip"><b>echoip</b></a> - is a IP address lookup service.<br>
&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>
&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>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/SecureAuthCorp/impacket"><b>impacket</b></a> - is a collection of Python classes for working with network protocols.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/arthepsy/ssh-audit"><b>ssh-audit</b></a> - is a tool for SSH server auditing.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://aria2.github.io/"><b>aria2</b></a> - is a lightweight multi-protocol & multi-source command-line download utility.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/x-way/iptables-tracer"><b>iptables-tracer</b></a> - observe the path of packets through the iptables chains.<br>
</p>

##### :black_small_square: Network (DNS)

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/mschwager/fierce"><b>fierce</b></a> - is a DNS reconnaissance tool for locating non-contiguous IP space.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/subfinder/subfinder"><b>subfinder</b></a> - is a subdomain discovery tool that discovers valid subdomains for websites.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/aboul3la/Sublist3r"><b>sublist3r</b></a> - is a fast subdomains enumeration tool for penetration testers.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/OWASP/Amass"><b>amass</b></a> - is tool that obtains subdomain names by scraping data sources, crawling web archives and more.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/google/namebench"><b>namebench</b></a> - provides personalized DNS server recommendations based on your browsing history.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/guelfoweb/knock"><b>knock</b></a> - is a tool to enumerate subdomains on a target domain through a wordlist.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/jedisct1/dnscrypt-proxy"><b>dnscrypt-proxy 2</b></a> - a flexible DNS proxy, with support for encrypted DNS protocols.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/dnsdb/dnsdbq"><b>dnsdbq</b></a> - API client providing access to passive DNS database systems (pDNS at Farsight Security, CIRCL pDNS).<br>
</p>

##### :black_small_square: Network (HTTP)

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://curl.haxx.se/"><b>Curl</b></a> - is a command line tool and library for transferring data with URLs.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://gitlab.com/davidjpeacock/kurly"><b>kurly</b></a> - is an alternative to the widely popular curl program, written in Golang.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/jakubroztocil/httpie"><b>HTTPie</b></a> - is an user-friendly HTTP client.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/asciimoo/wuzz"><b>wuzz</b></a> - is an interactive cli tool for HTTP inspection.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/trimstray/htrace.sh"><b>htrace.sh</b></a> - is a simple Swiss Army knife for http/https troubleshooting and profiling.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/reorx/httpstat"><b>httpstat</b></a> - is a tool that visualizes curl statistics in a way of beauty and clarity.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/gchaincl/httplab"><b>httplab</b></a> - is an interactive web server.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://lynx.browser.org/"><b>Lynx</b></a> - is a text browser for the World Wide Web.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/dhamaniasad/HeadlessBrowsers"><b>HeadlessBrowsers</b></a> - a list of (almost) all headless web browsers in existence.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://httpd.apache.org/docs/2.4/programs/ab.html"><b>ab</b></a> - is a single-threaded command line tool for measuring the performance of HTTP web servers.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.joedog.org/siege-home/"><b>siege</b></a> - is an http load testing and benchmarking utility.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/wg/wrk"><b>wrk</b></a> - is a modern HTTP benchmarking tool capable of generating significant load.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/giltene/wrk2"><b>wrk2</b></a> - is a constant throughput, correct latency recording variant of wrk.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/codesenberg/bombardier"><b>bombardier</b></a> - is a fast cross-platform HTTP benchmarking tool written in Go.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/cmpxchg16/gobench"><b>gobench</b></a> - http/https load testing and benchmarking tool.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/rakyll/hey"><b>hey</b></a> - HTTP load generator, ApacheBench (ab) replacement, formerly known as rakyll/boom.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/tarekziade/boom"><b>boom</b></a> - is a script you can use to quickly smoke-test your web app deployment.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/shekyan/slowhttptest"><b>SlowHTTPTest</b></a> - is a tool that simulates some Application Layer Denial of Service attacks by prolonging HTTP.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/OJ/gobuster"><b>gobuster</b></a> - is a free and open source directory/file & DNS busting tool written in Go.<br>
</p>

##### :black_small_square: SSL

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.openssl.org/"><b>openssl</b></a> - is a robust, commercial-grade, and full-featured toolkit for the TLS and SSL protocols.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/nabla-c0d3/sslyze"><b>sslyze
</b></a> - fast and powerful SSL/TLS server scanning library.<br>
&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>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/mozilla/cipherscan"><b>cipherscan</b></a> - a very simple way to find out which SSL ciphersuites are supported by a target.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://www.tarsnap.com/spiped.html"><b>spiped</b></a> - is a utility for creating symmetrically encrypted and authenticated pipes between socket addresses.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/certbot/certbot"><b>Certbot</b></a> - is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/FiloSottile/mkcert"><b>mkcert</b></a> - simple zero-config tool to make locally trusted development certificates with any names you'd like.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/yassineaboukir/sublert"><b>Sublert</b></a> - is a security and reconnaissance tool to automatically monitor new subdomains.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/trimstray/mkchain"><b>mkchain</b></a> - open source tool to help you build a valid SSL certificate chain.<br>
</p>

##### :black_small_square: Security

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/deployment_guide/ch-selinux"><b>SELinux</b></a> - provides a flexible Mandatory Access Control (MAC) system built into the Linux kernel.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://wiki.ubuntu.com/AppArmor"><b>AppArmor</b></a> - proactively protects the operating system and applications from external or internal threats.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/grapheneX/grapheneX"><b>grapheneX</b></a> - Automated System Hardening Framework.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/dev-sec/"><b>DevSec Hardening Framework</b></a> - Security + DevOps: Automatic Server Hardening.<br>
</p>

##### :black_small_square: Auditing Tools

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.ossec.net/"><b>ossec</b></a> - actively monitoring all aspects of system activity with file integrity monitoring.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/chap-system_auditing"><b>auditd</b></a> - provides a way to track security-relevant information on your system.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.nongnu.org/tiger/"><b>Tiger</b></a> - is a security tool that can be use both as a security audit and intrusion detection system.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/rebootuser/LinEnum"><b>LinEnum</b></a> - scripted Local Linux Enumeration & Privilege Escalation Checks.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/installation/rkhunter"><b>Rkhunter</b></a> - scanner tool for Linux systems that scans backdoors, rootkits and local exploits on your systems.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/hasherezade/pe-sieve"><b>PE-sieve</b></a> - is a light-weight tool that helps to detect malware running on the system.<br>
</p>

##### :black_small_square: System Diagnostics/Debuggers

<p>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://dtrace.org/blogs/about/"><b>DTrace</b></a> - is a performance analysis and troubleshooting tool.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://en.wikipedia.org/wiki/Ltrace"><b>ltrace</b></a> - is a library call tracer, used to trace calls made by programs to library functions.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/brainsmoke/ptrace-burrito"><b>ptrace-burrito</b></a> - is a friendly wrapper around ptrace.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/brendangregg/perf-tools"><b>perf-tools</b></a> - performance analysis tools based on Linux perf_events (aka perf) and ftrace.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/iovisor/bpftrace"><b>bpftrace</b></a> - high-level tracing language for Linux eBPF.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://www.valgrind.org/"><b>Valgrind</b></a> - is an instrumentation framework for building dynamic analysis tools.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/gperftools/gperftools"><b>gperftools</b></a> - high-performance multi-threaded malloc() implementation, plus some performance analysis tools.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/hishamhm/htop"><b>htop</b></a> - interactive text-mode process viewer for Unix systems. It aims to be a better 'top'.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.atoptool.nl/"><b>atop</b></a> - ASCII performance monitor. Includes statistics for CPU, memory, disk, swap, network, and processes.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://www.brendangregg.com/flamegraphs.html"><b>FlameGraph</b></a> - stack trace visualizer.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/mozilla/rr"><b>rr</b></a> - is a lightweight tool for recording, replaying and debugging execution of applications.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://pcp.io/index.html"><b>Performance Co-Pilot</b></a> - a system performance analysis toolkit.</br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/sharkdp/hexyl"><b>hexyl</b></a> - a command-line hex viewer.<br>
</p>

##### :black_small_square: Log Analyzers

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/rcoh/angle-grinder"><b>angle-grinder</b></a> - slice and dice log files on the command line.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://lnav.org"><b>lnav</b></a> - log file navigator with search and automatic refresh.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/lebinh/ngxtop"><b>ngxtop</b></a> - real-time metrics for nginx server.<br>
</p>

##### :black_small_square: Databases

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/xo/usql"><b>usql</b></a> - universal command-line interface for SQL databases.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/dbcli/pgcli"><b>pgcli</b></a> - postgres CLI with autocompletion and syntax highlighting.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/osquery/osquery"><b>OSQuery</b></a> - is a SQL powered operating system instrumentation, monitoring, and analytics framework.<br>
</p>

##### :black_small_square: TOR

<p>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/trimstray/multitor"><b>multitor</b></a> - a tool that lets you create multiple TOR instances with a load-balancing.<br>
</p>

##### :black_small_square: Messengers/IRC Clients

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://irssi.org"><b>Irssi</b></a> - is a free open source terminal based IRC client.<br>
</p>

##### :black_small_square: Other

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://inotify.aiken.cz/"><b>incron</b></a> - is an inode-based filesystem notification technology.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/rgburke/grv"><b>GRV</b></a> - is a terminal based interface for viewing Git repositories.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://jonas.github.io/tig/"><b>Tig</b></a> - text-mode interface for Git.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/tldr-pages/tldr"><b>tldr</b></a> - simplified and community-driven man pages.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/mholt/archiver"><b>archiver</b></a> - easily create and extract .zip, .tar, .tar.gz, .tar.bz2, .tar.xz, .tar.lz4, .tar.sz, and .rar.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/tj/commander.js"><b>commander.js</b></a> - minimal CLI creator in JavaScript.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/tomnomnom/gron"><b>gron</b></a> - make JSON greppable!<br>
</p>

#### GUI Tools &nbsp;[<sup>[TOC]</sup>](#anger-table-of-contents)

##### :black_small_square: Terminal emulators

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/Guake/guake"><b>Guake</b></a> - is a dropdown terminal made for the GNOME desktop environment.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://gnometerminator.blogspot.com/p/introduction.html"><b>Terminator</b></a> - is based on GNOME Terminal, useful features for sysadmins and other users.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://sw.kovidgoyal.net/kitty/"><b>Kitty</b></a> - is a GPU based terminal emulator that supports smooth scrolling and images.<br>
</p>

##### :black_small_square: Network

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.wireshark.org/"><b>Wireshark</b></a> - is the world’s foremost and widely-used network protocol analyzer.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.ettercap-project.org/"><b>Ettercap</b></a> - is a comprehensive network monitor tool.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://etherape.sourceforge.io/"><b>EtherApe</b></a> - is a graphical network monitoring solution.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://jmeter.apache.org/"><b>JMeter™</b></a> - open source software to load test functional behavior and measure performance.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/locustio/locust"><b>locust</b></a> - scalable user load testing tool written in Python.<br>
</p>

##### :black_small_square: Browsers

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.torproject.org/"><b>TOR Browser</b></a> - protect your privacy and defend yourself against network surveillance and traffic analysis.<br>
</p>

##### :black_small_square: Password Managers

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://keepassxc.org/"><b>KeePassXC</b></a> - store your passwords safely and auto-type them into your everyday websites and apps.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.enpass.io/"><b>Enpass</b></a> - password manager and secure wallet.<br>
</p>

##### :black_small_square: Messengers/IRC Clients

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://hexchat.github.io/index.html"><b>HexChat</b></a> - is an IRC client based on XChat.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://pidgin.im/"><b>Pidgin</b></a> - is an easy to use and free chat client used by millions.<br>
</p>

##### :black_small_square: Messengers (end-to-end encryption)

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.signal.org/"><b>Signal</b></a> - is an encrypted communications app.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://wire.com/en/"><b>Wire</b></a> - secure messaging, file sharing, voice calls and video conferences. All protected with end-to-end encryption.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/prof7bit/TorChat"><b>TorChat</b></a> - decentralized anonymous instant messenger on top of Tor Hidden Services.<br>
</p>

##### :black_small_square: Text editors

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.sublimetext.com/3"><b>Sublime Text</b></a> - is a lightweight, cross-platform code editor known for its speed, ease of use.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://code.visualstudio.com/"><b>Visual Studio Code</b></a> - an open-source and free source code editor developed by Microsoft.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://atom.io/"><b>Atom</b></a> - a hackable text editor for the 21st Century.<br>
</p>

#### Web Tools &nbsp;[<sup>[TOC]</sup>](#anger-table-of-contents)

##### :black_small_square: Browsers

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.ssllabs.com/ssltest/viewMyClient.html"><b>SSL/TLS Capabilities of Your Browser</b></a> - test your browser's SSL implementation.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://caniuse.com/"><b>Can I use</b></a> - provides up-to-date browser support tables for support of front-end web technologies.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://panopticlick.eff.org/"><b>Panopticlick 3.0</b></a> - is your browser safe against tracking?<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://privacy.net/analyzer/"><b>Privacy Analyzer</b></a> - see what data is exposed from your browser.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://browserleaks.com/"><b>Web Browser Security</b></a> - it's all about Web Browser fingerprinting.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.howsmyssl.com/"><b>How's My SSL?</b></a> - help a web server developer learn what real world TLS clients were capable of.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://suche.org/sslClientInfo"><b>sslClientInfo</b></a> - client test (incl TLSv1.3 information).<br>
</p>

##### :black_small_square: SSL/Security

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.ssllabs.com/ssltest/"><b>SSLLabs Server Test</b></a> - free online service performs a deep analysis of the configuration of any SSL web server.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://dev.ssllabs.com/ssltest/"><b>SSLLabs Server Test (DEV)</b></a> - free online service performs a deep analysis of the configuration of any SSL web server.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.immuniweb.com/ssl/"><b>ImmuniWeb® SSLScan</b></a> - test SSL/TLS (PCI DSS, HIPAA and NIST).<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.jitbit.com/sslcheck/"><b>SSL Check</b></a> - scan your website for non-secure content.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://cryptcheck.fr/"><b>CryptCheck</b></a> - test your TLS server configuration (e.g. ciphers).<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://urlscan.io/"><b>urlscan.io</b></a> - service to scan and analyse websites.<br>
&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>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://uselesscsp.com/"><b>Useless CSP</b></a> - public list about CSP in some big players (might make them care a bit more).<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://cipherli.st/"><b>cipherli.st</b></a> - strong ciphers for Apache, Nginx, Lighttpd and more.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://2ton.com.au/dhtool/"><b>dhtool</b></a> - public Diffie-Hellman parameter service/tool.<br>
&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>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://sslmate.com/caa/"><b>CAA Record Helper</b></a> - generate a CAA policy.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://certstream.calidog.io/"><b>CERTSTREAM</b></a> - real-time certificate transparency log update stream.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://crt.sh/"><b>crt.sh</b></a> - discovers certificates by continually monitoring all of the publicly known CT.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.hardenize.com/"><b>Hardenize</b></a> - deploy the security standards.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://cryptcheck.fr/suite/"><b>Cipher suite compatibility</b></a> - test TLS cipher suite compatibility.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.urlvoid.com/"><b>urlvoid</b></a> - this service helps you detect potentially malicious websites.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://securitytxt.org/"><b>security.txt</b></a> - a proposed standard (generator) which allows websites to define security policies.<br>
</p>

##### :black_small_square: HTTP Headers & Web Linters

<p>
&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>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://webhint.io/"><b>webhint</b></a> - is a linting tool that will help you with your site's accessibility, speed, security and more.<br>
</p>

##### :black_small_square: DNS

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://viewdns.info/"><b>ViewDNS</b></a> - one source for free DNS related tools and information.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://dnslookup.org/"><b>DNSLookup</b></a> - is an advanced DNS lookup tool.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://dnslytics.com/"><b>DNSlytics</b></a> - online DNS investigation tool.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://dnsspy.io/"><b>DNS Spy</b></a> - monitor, validate and verify your DNS configurations.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://zonemaster.iis.se/en/"><b>Zonemaster</b></a> - helps you to control how your DNS works.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://leafdns.com/"><b>Leaf DNS</b></a> - comprehensive DNS tester.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://findsubdomains.com/"><b>Find subdomains online</b></a> - find subdomains for security assessment penetration test.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://dnsdumpster.com/"><b>DNSdumpster</b></a> - dns recon & research, find & lookup dns records.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://dnstable.com/"><b>DNS Table online</b></a> - search for DNS records by domain, IP, CIDR, ISP.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://intodns.com/"><b>intoDNS</b></a> - DNS and mail server health checker.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://www.zonecut.net/dns/"><b>DNS Bajaj</b></a> - check the delegation of your domain.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.buddyns.com/delegation-lab/"><b>BuddyDNS Delegation LAB</b></a> - check, trace and visualize delegation of your domain.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://dnssec-debugger.verisignlabs.com/"><b>dnssec-debugger</b></a> - DS or DNSKEY records validator.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://ptrarchive.com/"><b>PTRarchive.com</b></a> - this site is responsible for the safekeeping of historical reverse DNS records.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://xip.io/"><b>xip.io</b></a> - wildcard DNS for everyone.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://ceipam.eu/en/dnslookup.php"><b>dnslookup (ceipam)</b></a> - one of the best DNS propagation checker (and not only).<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://whatsmydns.com"><b>What's My DNS</b></a> - DNS propagation checking tool.<br>

</p>

##### :black_small_square: Mail

<p>
&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>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://multirbl.valli.org/"><b>MultiRBL</b></a> - complete IP check for sending Mailservers.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://dkimvalidator.com/"><b>DKIM SPF & Spam Assassin Validator</b></a> - checks mail authentication and scores messages with Spam Assassin.<br>
</p>

##### :black_small_square: Encoders/Decoders and Regex testing

<p>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://uncoder.io/"><b>Uncoder</b></a> - the online translator for search queries on log data.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://regex101.com/"><b>Regex101</b></a> - online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.regextester.com/"><b>RegEx Testing</b></a> - online regex testing tool.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.regexpal.com/"><b>RegEx Pal</b></a> - online regex testing tool + other tools.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://gchq.github.io/CyberChef/"><b>The Cyber Swiss Army Knife</b></a> - a web app for encryption, encoding, compression and data analysis.<br>
</p>

##### :black_small_square: Net-tools

<p>
&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.<b>*</b><br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.robtex.com/"><b>Robtex</b></a> - uses various sources to gather public information about IP numbers, domain names, host names, routes etc.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://securitytrails.com/"><b>Security Trails</b></a> - APIs for Security Companies, Researchers and Teams.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://tools.keycdn.com/curl"><b>Online Curl</b></a> - curl test, analyze HTTP Response Headers.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://extendsclass.com/"><b>Online Tools for Developers</b></a> - HTTP API tools, testers, encoders, converters, formatters, and other tools.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://ping.eu/"><b>Ping.eu</b></a> - online Ping, Traceroute, DNS lookup, WHOIS and others.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://network-tools.com/"><b>Network-Tools</b></a> - network tools for webmasters, IT technicians & geeks.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://riseup.net/"><b>Riseup</b></a> - provides online communication tools for people and groups working on liberatory social change.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.virustotal.com/gui/home/upload"><b>VirusTotal</b></a> - analyze suspicious files and URLs to detect types of malware.<br>
</p>

##### :black_small_square: Privacy

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.privacytools.io/"><b>privacytools.io</b></a> - provides knowledge and tools to protect your privacy against global mass surveillance.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://dnsprivacy.org/wiki/display/DP/DNS+Privacy+Test+Servers"><b>DNS Privacy Test Servers</b></a> - DNS privacy recursive servers list (with a 'no logging' policy).<br>
</p>

##### :black_small_square: Code parsers/playgrounds

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.shellcheck.net/"><b>ShellCheck</b></a> - finds bugs in your shell scripts.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://explainshell.com/"><b>explainshell</b></a> - get interactive help texts for shell commands.<br>
&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>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://codesandbox.io/"><b>CodeSandbox</b></a> - online code editor for web application development. Supports React, Vue, Angular, CxJS, Dojo, etc.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="http://sandbox.onlinephpfunctions.com/"><b>PHP Sandbox</b></a> - test your PHP code with this code tester.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.repl.it/"><b>Repl.it</b></a> - an instant IDE to learn, build, collaborate, and host all in one place.<br>
</p>

##### :black_small_square: Performance

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://gtmetrix.com/"><b>GTmetrix</b></a> - analyze your site’s speed and make it faster.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://performance.sucuri.net/"><b>Sucuri loadtimetester</b></a> - test here the
performance of any of your sites from across the globe.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://tools.pingdom.com/"><b>Pingdom Tools</b></a> - analyze your site’s speed around the world.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://pingme.io/"><b>PingMe.io</b></a> - run website latency tests across multiple geographic regions.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://developers.google.com/speed/pagespeed/insights/"><b>PageSpeed Insights</b>