https://www.gnu.org/software/bash/ GNU Bash: - is an sh-compatible shell that incorporates useful features from the Korn shell and C shell.
https://www.zsh.org/ Zsh: - is a shell designed for interactive use, although it is also a powerful scripting language.
https://tcl-lang.org/ tclsh: - is a very powerful cross-platform shell, suitable for a huge range of uses.
https://github.com/Bash-it/bash-it bash-it: - is a framework for using, developing and maintaining shell scripts and custom commands.
https://ohmyz.sh/ Oh My ZSH!: - is the best framework for managing your Zsh configuration.
https://github.com/oh-my-fish/oh-my-fish Oh My Fish: - the Fishshell framework.
https://github.com/starship/starship Starship: - the cross-shell prompt written in Rust.
https://github.com/romkatv/powerlevel10k powerlevel10k: - is a fast reimplementation of Powerlevel9k ZSH theme.
Shell plugins
https://github.com/rupa/z z: - tracks the folder you use the most and allow you to jump, without having to type the whole path.
https://github.com/junegunn/fzf fzf: - is a general-purpose command-line fuzzy finder.
https://github.com/zsh-users/zsh-autosuggestions zsh-autosuggestions: - Fish-like autosuggestions for Zsh.
https://github.com/zsh-users/zsh-syntax-highlighting zsh-syntax-highlighting: - Fish shell like syntax highlighting for Zsh.
https://github.com/unixorn/awesome-zsh-plugins Awesome ZSH Plugins: - A list of frameworks, plugins, themes and tutorials for ZSH.
Managers
https://midnight-commander.org/ Midnight Commander: - is a visual file manager, licensed under GNU General Public License.
https://github.com/ranger/ranger ranger: - is a VIM-inspired filemanager for the console.
https://github.com/jarun/nnn nnn: - is a tiny, lightning fast, feature-packed file manager.
https://www.gnu.org/software/screen/ screen: - is a full-screen window manager that multiplexes a physical terminal.
https://github.com/tmux/tmux/wiki tmux: - is a terminal multiplexer, lets you switch easily between several programs in one terminal.
https://github.com/peikk0/tmux-cssh tmux-cssh: - is a tool to set comfortable and easy to use functionality, clustering and synchronizing tmux-sessions.
Text editors
http://ex-vi.sourceforge.net/ vi: - is one of the most common text editors on Unix.
https://www.vim.org/ vim: - is a highly configurable text editor.
https://www.gnu.org/software/emacs/ emacs: - is an extensible, customizable, free/libre text editor, and more.
https://github.com/zyedidia/micro micro: - is a modern and intuitive terminal-based text editor.
https://neovim.io/ neovim: - is a free open source, powerful, extensible and usable code editor.
https://www.spacemacs.org/ spacemacs: - a community-driven Emacs distribution.
https://spacevim.org/ spacevim: - a community-driven vim distribution.
Files and directories
https://github.com/sharkdp/fd fd: - is a simple, fast and user-friendly alternative to find.
https://dev.yorhel.nl/ncdu ncdu: - is an easy to use, fast disk usage analyzer.
Network
https://www.putty.org/ PuTTY: - is an SSH and telnet client, developed originally by Simon Tatham.
https://mosh.org/ Mosh: - is a SSH wrapper designed to keep a SSH session alive over a volatile connection.
https://eternalterminal.dev/ Eternal Terminal: - enables mouse-scrolling and tmux commands inside the SSH session.
https://nmap.org/ nmap: - is a free and open source (license) utility for network discovery and security auditing.
https://github.com/zmap/zmap zmap: - is a fast single packet network scanner designed for Internet-wide network surveys.
https://github.com/RustScan/RustScan Rust Scan: - to find all open ports faster than Nmap.
https://github.com/robertdavidgraham/masscan masscan: - is the fastest Internet port scanner, spews SYN packets asynchronously.
https://github.com/gvb84/pbscan pbscan: - is a faster and more efficient stateless SYN scanner and banner grabber.
http://www.hping.org/ hping: - is a command-line oriented TCP/IP packet assembler/analyzer.
https://github.com/traviscross/mtr mtr: - is a tool that combines the functionality of the ‘traceroute’ and ‘ping’ programs in a single tool.
https://github.com/mehrdadrad/mylg mylg: - utility which combines the functions of the different network probes in one diagnostic tool.
http://netcat.sourceforge.net/ netcat: - utility which reads and writes data across network connections, using the TCP/IP protocol.
http://www.dest-unreach.org/socat/ socat: - utility which transfers data between two objects.
https://www.tcpdump.org/ tcpdump: - is a powerful command-line packet analyzer.
https://www.wireshark.org/docs/man-pages/tshark.html tshark: - is a tool that allows us to dump and analyze network traffic (wireshark cli).
https://termshark.io/ Termshark: - is a simple terminal user-interface for tshark.
https://github.com/jpr5/ngrep ngrep: - is like GNU grep applied to the network layer.
http://netsniff-ng.org/ netsniff-ng: - is a Swiss army knife for your daily Linux network plumbing if you will.
https://github.com/google/stenographer stenographer: - is a packet capture solution which aims to quickly spool all packets to disk.
https://github.com/sachaos/tcpterm tcpterm: - visualize packets in TUI.
https://github.com/tgraf/bmon bmon: - is a monitoring and debugging tool to capture networking related statistics and prepare them visually.
http://iptraf.seul.org/2.6/manual.html#installation iptraf-ng: - is a console-based network monitoring program for Linux that displays information about IP traffic.
https://github.com/vergoh/vnstat vnstat: - is a network traffic monitor for Linux and BSD.
https://iperf.fr/ iPerf3: - is a tool for active measurements of the maximum achievable bandwidth on IP networks.
https://github.com/Microsoft/Ethr ethr: - is a Network Performance Measurement Tool for TCP, UDP & HTTP.
https://github.com/jwbensley/Etherate Etherate: - is a Linux CLI based Ethernet and MPLS traffic testing tool.
https://github.com/mpolden/echoip echoip: - is a IP address lookup service.
https://github.com/troglobit/nemesis Nemesis: - packet manipulation CLI tool; craft and inject packets of several protocols.
https://github.com/packetfu/packetfu packetfu: - a mid-level packet manipulation library for Ruby.
https://scapy.net/ Scapy: - packet manipulation library; forge, send, decode, capture packets of a wide number of protocols.
https://github.com/SecureAuthCorp/impacket impacket: - is a collection of Python classes for working with network protocols.
https://github.com/arthepsy/ssh-audit ssh-audit: - is a tool for SSH server auditing.
https://aria2.github.io/ aria2: - is a lightweight multi-protocol & multi-source command-line download utility.
https://github.com/x-way/iptables-tracer iptables-tracer: - observe the path of packets through the iptables chains.
https://github.com/proabiral/inception inception: - a highly configurable tool to check for whatever you like against any number of hosts.
https://mremoteng.org/ mRemoteNG: - a fork of mRemote, multi-tabbed PuTTy on steroids!
Network (DNS)
https://github.com/farrokhi/dnsdiag dnsdiag: - is a DNS diagnostics and performance measurement tools.
https://github.com/mschwager/fierce fierce: - is a DNS reconnaissance tool for locating non-contiguous IP space.
https://github.com/subfinder/subfinder subfinder: - is a subdomain discovery tool that discovers valid subdomains for websites.
https://github.com/aboul3la/Sublist3r sublist3r: - is a fast subdomains enumeration tool for penetration testers.
https://github.com/OWASP/Amass amass: - is tool that obtains subdomain names by scraping data sources, crawling web archives, and more.
https://github.com/google/namebench namebench: - provides personalized DNS server recommendations based on your browsing history.
https://github.com/blechschmidt/massdns massdns: - is a high-performance DNS stub resolver for bulk lookups and reconnaissance.
https://github.com/guelfoweb/knock knock: - is a tool to enumerate subdomains on a target domain through a wordlist.
https://github.com/DNS-OARC/dnsperf dnsperf: - DNS performance testing tools.
https://github.com/jedisct1/dnscrypt-proxy dnscrypt-proxy 2: - a flexible DNS proxy, with support for encrypted DNS protocols.
https://github.com/dnsdb/dnsdbq dnsdbq: - API client providing access to passive DNS database systems.
https://github.com/looterz/grimd grimd: - fast dns proxy, built to black-hole internet advertisements and malware servers.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/deployment_guide/ch-selinux SELinux: - provides a flexible Mandatory Access Control (MAC) system built into the Linux kernel.
https://wiki.ubuntu.com/AppArmor AppArmor: - proactively protects the operating system and applications from external or internal threats.
https://github.com/grapheneX/grapheneX grapheneX: - Automated System Hardening Framework.
https://www.ossec.net/ ossec: - actively monitoring all aspects of system activity with file integrity monitoring.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/chap-system_auditing auditd: - provides a way to track security-relevant information on your system.
https://www.nongnu.org/tiger/ Tiger: - is a security tool that can be use both as a security audit and intrusion detection system.
https://cisofy.com/lynis/ Lynis: - battle-tested security tool for systems running Linux, macOS, or Unix-based operating system.
https://github.com/rebootuser/LinEnum LinEnum: - scripted Local Linux Enumeration & Privilege Escalation Checks.
https://github.com/installation/rkhunter Rkhunter: - scanner tool for Linux systems that scans backdoors, rootkits and local exploits on your systems.
https://github.com/hasherezade/pe-sieve PE-sieve: - is a light-weight tool that helps to detect malware running on the system.
https://github.com/carlospolop/privilege-escalation-awesome-scripts-suite PEASS: - privilege escalation tools for Windows and Linux/Unix and MacOS.
System Diagnostics/Debuggers
https://github.com/strace/strace strace: - diagnostic, debugging and instructional userspace utility for Linux.
http://dtrace.org/blogs/about/ DTrace: - is a performance analysis and troubleshooting tool.
https://en.wikipedia.org/wiki/Ltrace ltrace: - is a library call tracer, used to trace calls made by programs to library functions.
https://github.com/brainsmoke/ptrace-burrito ptrace-burrito: - is a friendly wrapper around ptrace.
https://github.com/brendangregg/perf-tools perf-tools: - performance analysis tools based on Linux perf_events (aka perf) and ftrace.
https://github.com/iovisor/bpftrace bpftrace: - high-level tracing language for Linux eBPF.
https://github.com/draios/sysdig sysdig: - system exploration and troubleshooting tool with first class support for containers.
http://www.valgrind.org/ Valgrind: - is an instrumentation framework for building dynamic analysis tools.
https://github.com/gperftools/gperftools gperftools: - high-performance multi-threaded malloc() implementation, plus some performance analysis tools.
https://nicolargo.github.io/glances/ glances: - cross-platform system monitoring tool written in Python.
https://github.com/hishamhm/htop htop: - interactive text-mode process viewer for Unix systems. It aims to be a better ‘top’.
https://github.com/aristocratos/bashtop bashtop: - Linux resource monitor written in pure Bash.
http://nmon.sourceforge.net/pmwiki.php nmon: - a single executable for performance monitoring and data analysis.
https://www.atoptool.nl/ atop: - ASCII performance monitor. Includes statistics for CPU, memory, disk, swap, network, and processes.
https://en.wikipedia.org/wiki/Lsof lsof: - displays in its output information about files that are opened by processes.