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What is Linux?
Linux is a free, open-source operating system, like Windows or macOS, used on servers and many developer computers.
- Category GitHub & code
- Updated 20 Oct 2026
Linux, explained simply
Linux is the system that runs on much of the internet's servers. It is also used on phones, as Android is built on it.
You can install it on a regular computer too, in many different versions.
Many AI tools are built and tested on Linux first.
For example, a cloud service that runs an AI model is often running Linux.
On ITG Now, our free tool guides give separate steps for Mac, Windows, and Linux when a tool supports them.
Related terms
WSLTerminalOpen sourceCloud computingHomebrew
Where you'll see it on ITG Now
- GuideOpenLogi: Free Logitech Options+ Alternative (2026)
- GuideApple Container: Run Linux Containers on Mac for Free
- GuideMeetily: Free AI Meeting Note Taker That Stays Private
- GuideHandy: Free Offline Voice Typing App (2026 Guide)
- GuidePhotoCraft: Free PSD Editor That Works Like Photoshop (2026)
- GuideRecordly: Free Screen Recorder With Auto-Zoom (2026)
Questions people ask about Linux
Is Linux free?
Yes. Most versions of Linux are free to download and use.
Linux vs Windows: what is the difference?
Windows is a paid system from Microsoft. Linux is open source and comes in many versions.
Do I need Linux to use open-source AI tools?
No. Most tools also run on Mac or Windows, sometimes through WSL.