*Nix

Simple Icons contributors / Simple Icons — CC0 1.0

*nix notes: shells, ssh, packages, filesystem commands, and day-to-day system management.

*nix notes: shells, ssh, packages, filesystem commands, and day-to-day system management.

Topics

• at — at schedules a one-shot command to run later.
• cd — cd changes the current working directory.
• chmod — chmod changes mode bits on one or more paths. The form is a permission set, optional switches, then the path list.
• Common commands — Short notes on common *nix commands.
• Cron
• Custom
• date — date prints the current date and time. An optional format string follows +.
• Delete — Remove directories and files.
• find — find walks a tree recursively.
• FTP
• gpg — Verify a digital signature. Pass the signature file.
• grep — grep searches for a pattern in a file.
• history — history lists commands from the shell history.
• Hit a URL — Hit a URL without wget and curl.
• hostname — hostname displays the current hostname.
• hosts — /etc/hosts maps names to addresses.
• iptables — Packet filter rules with iptables.
• ln — ln -s creates a symbolic link.
• ls — https://en.wikipedia.org/wiki/Ls.
• Management
• Mint
• Network
• nohup — nohup keeps a command running after logout.
• Ports — netstat -lnptu lists active ports, including listening.
• Process — ps -ef lists running processes.
• ps — Rank processes by CPU usage with ps -eo pcpu,pid,user,args, sorted, in less.
• Rescue
• sar — Sample CPU usage with sar -u 2 5 to see users using max CPU.
• scp — su is needed.
• Sh
• SSH
• su — su switches user: run as another user. The user changes.
• sudo — sudo runs with superuser privileges. The user remains the same. The user should be in the sudo-able list.
• tar — http://www.tecmint.com/18-tar-command-examples-in-linux.
• tree — -P filters by pattern.
• Ubuntu
• Utility
• Version — Show the OS version from /etc/*-release and lsb_release -a.
• wc — wc -l is the number of lines.
• xargs — http://offbytwo.com/2011/06/26/things-you-didnt-know-about-xargs.html.
• Yum
• zip — Example.