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Linux is the best-known and most-used open source operating system. As an operating system, Linux is software that sits underneath all of the other software on a computer, receiving requests from those programs and relaying these requests to the computer’s hardware. Learn more on our what is Linux resource page.

Bug tracking magnifying glass on computer screen

Learn how to use some of the lesser-known features of gdb to inspect and fix your code.
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The chgrp and newgrp commands help you manage files that need to maintain group ownership.
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Which Windows version sounds most familiar to you? Take our poll.
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It's been two decades since IBM got onboard with Linux on the mainframe. Here's what happened.
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.
A person programming

Virt-manager provides a full range of options for spinning up virtual machines on Linux.
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Linux's emergence on the mainframe is indebted to the external developer community working with IBM.