Mastering Linux Basics for DevOps

Linux is the backbone of modern DevOps. Whether you're managing servers, automating deployments, or working with cloud environments, a strong foundation in Linux is crucial.

Why Linux for DevOps?

1. Widely Used in Production – Most cloud and enterprise environments run on Linux.

2. Powerful Command Line Interface (CLI) – Allows automation and efficient server management.

3. Open Source & Customizable – Flexibility in configuring and optimizing systems.

4. Strong Community Support – Extensive documentation and support from the open-source community.

Essential Linux Concepts for DevOps

• Key Commands for file system and navigation : ls, pwd, cd, mkdir, rm, cp, mv, find,locate

• Linux directory structure: /bin, /etc, /var, /home, /usr, /tmp, etc.

• Permissions and Ownership: chmod, chown, chgrp

• Creating and managing users: useradd, usermod, passwd, deluser

• Managing groups: groupadd, groupmod, gpasswd

• Checking running processes: ps, top, htop, pgrep

• Managing processes: kill, pkill, nice, renice, jobs, fg, bg

• Scheduling tasks: cron jobs (crontab -e), at, systemd timers

• Viewing logs: cat /var/log/syslog, journalctl

• Writing basic scripts: #!/bin/bash, echo, read, variables

A solid understanding of the Linux command line, system administration, and automation will help streamline DevOps workflows and enhance efficiency. Start by practicing these commands in a virtual environment, and build your expertise step by step.