Command line Command line feed

Learn how to make better use of the command line, the interface preferred by many open source developers and users.

Penguins walking on the beach

The chgrp and newgrp commands help you manage files that need to maintain group ownership.
bash logo on green background

Improve your shell game by upgrading from Bash to Z-shell.
computer screen

Get the details on what's inside your computer from the command line.
upside down cat

Learn when to use the tac command instead of cat, and why you might want to.
Terminal command prompt on orange background

Your terminal has plenty of options that allow you to theme what you see.
Raspberry pie with slice missing

Debug API clients with HTTPie, an easy-to-use command-line tool written in Python.
Shells in a competition

In our miniseries Variables in Shells, learn how to handle local variables in PowerShell.
Hand putting a Linux file folder into a drawer

Learn how to change a file or directory's ownership with chown.