linux terminal commands for beginner level

Navigating the File System

• ls — List files and directories in the current working directory.
• pwd — Output the absolute path of the working directory.
• cd — Change the current directory to a specified path.
• pushd/popd — Save and restore directories using a stack for quick navigation.
• file — Identify the type of a file based on its content.
• locate — Quickly find files by name using a pre‑built database.
• updatedb — Refresh the file name database used by locate.
• which — Show the full path of a command’s executable.
• history — Display a numbered list of recently executed commands.

Getting Help

• whatis — Display a one‑line description of a command from the manual.
• apropos — Search manual page names and descriptions for a keyword.
• man — Open the detailed manual for a command.

Working with Files

• mkdir — Create one or more new directories.
• touch — Update file timestamps or create an empty file if it doesn’t exist.
• cp — Copy files and directories from one location to another.
• mv — Move or rename files and directories.
• rm — Permanently delete files or directories.
• rmdir — Remove empty directories only.

Working with Text Files

• cat — Concatenate and display file content on the terminal.
• more/less — View file contents one screen at a time, with navigation.
• nano — A simple, beginner‑friendly terminal text editor.

Managing Users

• sudo — Run a command with elevated privileges as another user (default root).
• su — Switch to another user account in the terminal session.
• users — List the usernames of currently logged‑in users.
• id — Display your user ID, group ID, and supplementary group memberships.

Changing File Permissions

• chmod — Modify read, write, and execute permissions for a file or directory.

Killing Programs and Logging Out

• Ctrl+C — Interrupt and terminate the foreground process.
• killall — Terminate all processes matching a given name.
• exit — Close the current shell session or log out.