First of all, you might want to check out the subreddit: /r/commandline https://www.reddit.com/r/commandline/ https://www.reddit.com/r/commandline/ general co

First of all, you might want to check out the subreddit: /r/commandline https://www.reddit.com/r/commandline/ https://www.reddit.com/r/commandline/ general commands - awk/grep/sed/wc - text file processing - convert (image magick) - image processing tool - cpulimit - limit the cpu usage of a process - fdupes - check for duplicate files and optionally remove them - pdftk - concatenate pdf files and more - https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/ https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/ - rsync - back up tool - tmux - terminal multiplexer - almost always my first install - tree - view directory contents in a tree format - zcat/zmore - display a file that is compressed (e.g. zmore /var/log/syslog.2.gz) security/reverse engineering: - binwalk - search binary images for embedded files - gdb + peda - debugger with extensions - https://github.com/longld/peda https://github.com/longld/peda - nmap - network scanning tool - radare2 - command line dissassembler - https://github.com/radare/radare2 https://github.com/radare/radare2 - scapy - network packet crafting - https://github.com/secdev/scapy https://github.com/secdev/scapy - tshark - network traffic analyzer - tcpdump - network traffic analyzer - xxd - hexdump tool Bonus: - find - find files - I often use this to find files containing a string: $ cat bin/findstring #!/bin/sh find . -type f -exec grep -i -l "$@" {} \;