Introduction to Linux Servers

Welcome to Linux servers. You'll learn what they are, why they run most of the internet, and how to drive them from the command line.

A server is a machine that serves requests from clients. Servers run websites, store data, and host apps — the backbone of nearly everything online.

Linux dominates servers for good reason: rock-solid stability, open-source security review, deep customization, and it's free.

You'll mostly work through the Command Line Interface (CLI) — typing text commands instead of clicking. It's fast, scriptable, and built for remote work.

You reach the CLI through a terminal. Connect to a server and you'll see a prompt like user@hostname:~$ waiting for your command.

Your first command: echo. It prints back whatever text you hand it — perfect for quick tests and messages. Try it.

When a command runs, the text it prints back is its standard output. echo sent your message straight to the screen; richer commands return lists or status info.

Most commands follow one shape: command [options] [arguments]. Options tweak behavior (-e), arguments are what it acts on. That pattern repeats everywhere.

Stuck on a command? man opens its manual. Type man echo and you'll get the full documentation, right in the terminal.

You've learned the very first steps of interacting with a Linux server. Let's test your understanding!

Nice start! You now know what servers are, why Linux rules them, how to run echo, the command anatomy, and how to find help with man. Next: navigating the filesystem.