Glossary

The command line is a powerful text-based interface that allows users to interact with a computer’s operating system through typed commands rather than a graphical user interface (GUI). It provides a direct way to execute programs, navigate files, configure system settings, and automate tasks using scripts.

Unlike a GUI, where users click icons and menus, the command line requires specific syntax and commands, typically executed in a terminal emulator. This approach offers greater flexibility and efficiency, especially for developers, system administrators, and power users who need to perform batch operations or work on remote servers.

Command-line interfaces (CLIs) vary by operating system. Windows users interact with Command Prompt or PowerShell, while macOS and Linux users rely on the Bash, Zsh, or other Unix-based shells. Each shell has its own command set and scripting capabilities, but they all provide access to essential system functions such as file manipulation (ls, cd, mkdir, rm), process management (ps, kill, top), and networking tools (ping, curl, ssh).