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Terminal
A text-based interface for interacting with your computer through commands.
The terminal (also called command line, console, or shell) is a text-based interface that lets you interact with your computer by typing commands. While it may seem intimidating at first, the terminal is incredibly powerful and often faster than graphical interfaces for many tasks. It's essential for system administration, development, and automation. The terminal runs a shell program (like Bash or Zsh) that interprets your commands.
Basics
Examples
Open terminal with Ctrl+Alt+T on Ubuntu
ls - list files in current directory
cd Documents - change to Documents folder
pwd - print current working directory