150+ Linux Commands You Should Know

Every time I set up a new server, debug a production issue at 2 AM, or automate a deployment pipeline, I reach for the same set of Linux commands. After over a decade of working in terminals daily, I have built up a toolkit of 150+ commands that handle virtually every situation I encounter. This guide is the reference I wish I had when I started. Every command includes a real, runnable example with realistic output. No filler, no theory-only explanations. Just practical commands you can copy, paste, and use immediately. Whether you are a developer who just started using the terminal, a sysadmin managing production servers, or a DevOps engineer building CI/CD pipelines, this list has you covered. Quick reference table Here is every command in this guide, organized by category. Bookmark this section for fast lookups. Category Commands Navigation and File System pwd, cd, ls, tree, find, locate, which, whereis, file, stat, realpath, basename, dirname, readlink, df File Operations cat, less