Why learn Linux?
-
Runs over 90% of servers on the internet.
-
Powers Android, ChromeOS, most cloud, and even Mac dev workflows.
-
The terminal is faster than any GUI for thousands of tasks.
-
Foundational for DevOps, backend, and security careers.
What you can build with Linux
Server administration Daily development on macOS/WSL/Linux Writing scripts that automate work Operating Docker, Kubernetes, and CI systems
Linux tutorials
37 articles · page 1 of 2Hand-written tutorials, ordered as a recommended learning path.
- 01 What is Linux? An honest, jargon-free introduction to Linux — what it actually is, how it differs from Windows and macOS, the role of distributions, and why developers gravitate toward it.
- 02 Terminal Basics Open a terminal, read the prompt, and learn the handful of conventions that make every command-line tool consistent. The foundation for everything else you will do on Linux.
- 03 Essential Commands Twenty commands that cover the overwhelming majority of day-to-day Linux work — navigation, file management, inspection, search, and processes — with runnable examples for each.
- 04 The File System A practical tour of the Linux file system hierarchy — what /etc, /var, /home, /usr, and friends are actually for, and how paths, mounts, and hidden files work.
- 05 File Permissions Read every rwx string at a glance, change permissions with chmod (symbolic and numeric), change ownership with chown, and understand when to use sudo. With runnable examples.
- 06 Shell Scripting Write your first bash scripts — shebangs, variables, arguments, conditionals, loops, command substitution, exit codes, and the safety line every script should start with.
- 07 awk and sed Master awk and sed for text processing on Linux. Learn pattern matching, field extraction, in-place editing, and real-world one-liners for log analysis.
- 08 systemd Services Learn how to create, configure, and manage custom systemd service units on Linux. Covers unit files, dependencies, timers, and troubleshooting.
- 09 awk Practical Guide Master awk for text processing on Linux with practical examples covering field extraction, pattern matching, and data transformation.
- 10 cgroups Resource Limits Learn how to use Linux cgroups to limit CPU, memory, and I/O for processes, and understand their role in containers.
- 11 iptables/nftables Firewall Learn how to configure Linux firewalls with iptables and nftables, including rules, chains, NAT, and migration strategies.
- 12 Namespaces & Containers Understand Linux namespaces and how they provide process isolation for containers, with hands-on examples using unshare.
- 13 sysctl Performance Tuning Learn how to tune Linux kernel parameters with sysctl for better network, memory, and filesystem performance.
- 14 sed Stream Editing Learn how to use sed for find-and-replace, line editing, and text transformation in Linux with practical examples.
- 15 SSH Tunneling Learn how to use SSH local, remote, and dynamic port forwarding to securely access services across networks.
- 16 strace Debugging Learn how to use strace to trace system calls, debug application issues, and understand what your programs are doing under the hood.
- 17 systemd Service Files Learn how to create, configure, and manage custom systemd service files for running your applications as Linux services.
- 18 tmux Productivity Master tmux for managing multiple terminal sessions, persistent remote work, and an efficient command-line workflow.
- 19 Process Management A comprehensive guide to Linux process management: ps, top, kill, signals, systemd services, cgroups, resource limits, and the tools you need to keep systems running.
- 20 cgroups Explained A practical introduction to Linux control groups. Learn what cgroups do, how v1 and v2 differ, and how Docker and Kubernetes use them to cap CPU and memory.