The Z Shell Basics cheatsheet is a quick reference for common Unix commands in the Zsh shell. Unix commands are core utilities, while a shell (like Zsh) is an interpreter that runs these commands. Zsh is a popular shell with enhancements over the traditional Bourne Shell (sh) and Bash.
com is a TOPS-20ish TALK (aka LINK) for UNIX. It basically links multiple TTYs together, though differently than in ITS or TOPS-20. It supports multiple public/private rooms, chat logging and automated cleanup.
com runs on SDF.org
Still work in progress, comments welcome.inspired by http://blog.hawkhost.com/2010/06/28/tmux-the-terminal-multiplexer/also interesting: https://github.com/aziz/tmuxinator
Lsof lists on its standard output file information about files opened by processes. Lsof command usage will be useful for Linux/Unix system administrators/DevOps.