- ls - list directory contents
- wc - word, line, character, and byte count
- cp - copy files
- mv - move files
- rm - remove directory entries
- chmod - change file modes or Access Control Lists
- chown - change file owner and group
- mkdir - make directories
- touch - change file access and modification times
- grep, egrep, fgrep, pgrep - file pattern searcher
- sed - stream editor
- xargs - construct argument list(s) and execute utility
- netstat - show network status
- vim - Vi IMproved, a programmers text editor
- launchd - System wide and per-user daemon/agent manager
- jp2a: convert jpeg to ascii
- nmap: security scanner used to discover hosts and services on a computer network
- wget: download files from the internet
- ack: tool for finding text inside files
- lynx: text web browser
- p7zip: a linux port of 7zip
- pv: "pipe viewer", displays a progress bar for a series of piped commands
- rename: rename files using either common patterns via flags, or custom patterns via regex
- speedtest_cli: for testing internet bandwidth using speedtest.net
- tree: recursive directory listing with indention and colors
- webkit2png: captures a screenshot of a website and saves locally as png
- chronic: runs a command quietly unless it fails
- combine: combine the lines in two files using boolean operations
- ifdata: get network interface info without parsing ifconfig output
- ifne: run a program if the standard input is not empty
- isutf8: check if a file or standard input is utf-8
- lckdo: execute a program with a lock held
- mispipe: pipe two commands, returning the exit status of the first
- parallel: run multiple jobs at once
- pee: tee standard input to pipes
- sponge: soak up standard input and write to a file
- ts: timestamp standard input
- vidir: edit a directory in your text editor
- vipe: insert a text editor into a pipe
- zrun: automatically uncompress arguments to command
TODO: cheatsheets for these tools