In short
The dominant operating system for servers and cloud infrastructure — understanding its architecture, distributions, and basic philosophy ('everything is a file') is foundational for nearly everything else in DevOps.
How to learn this
- 1Set up a Linux environment (a VM, WSL, or a cloud free-tier instance) to practice hands-on.
- 2Learn the difference between major distributions (Ubuntu, CentOS/RHEL, Debian) at a high level.
- 3Practice basic commands daily until navigating a terminal feels natural, not intimidating.
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