cd — change directory

💬 "cd command"

• Concept: Short for Change Directory, it moves your current working directory to another location.
• Output structure: On success, nothing is output. If you try to move to a nonexistent path, an error message appears.
• Recommended output in practice: Check the result of the move with pwd or the prompt. You can return to the immediately previous folder with cd -.
• Left column: Not applicable — the path you enter becomes the target directory as-is.
• Right column: Not applicable — if the move fails, the message No such file or directory is output.

3 essential command combinations

• cd /var/log — move to an absolute path
• cd .. — move one level up to the parent folder
• cd - — return to the previous folder

There are also useful options to know.

• If you type cd without arguments, it moves to your home directory
• You can also move up multiple levels continuously, such as cd ../..

💬 "Tell me one situation this command can solve"

Scenario: The process of entering the correct folder before deployment.

Step 1: Start from a parent directory

Move to the parent folder.

cd /var/www

Step 2: Enter the deployment folder

Enter the target folder.

cd app

Step 3: Verify

Check the current location and contents.

pwd && ls -al

Actual execution screen

This is an example of moving with cd and then checking the location with pwd.

!Current path confirmed with pwd after running cd

A production server

Source (HTML): https://games.aidebatehub.com/programs/linux/filesystem/cd.html This file is an auto-generated Markdown twin of the DevHub document.