cd.md

Linux Tutorial: The cd Command

The cd (change directory) command is used to navigate between directories in the Linux terminal. It's essential for moving around the file system. Below, we'll cover common uses with examples. Assume you're starting in /home/user/Documents for these examples.

1. Change to a Specific Directory

Use cd followed by the absolute or relative path to the directory.

cd /path/to/directory

Example:
If you want to go to /home/user/Pictures:

cd /home/user/Pictures

Before: /home/user/Documents
After: /home/user/Pictures (check with pwd)

2. Change to Parent Directory

Use cd .. to move up one level in the directory tree.

cd ..  # Change to parent directory

Example:
From /home/user/Documents:

cd ..

Before: /home/user/Documents
After: /home/user (check with pwd)

3. Change to Home Directory

Use cd ~ to quickly return to your home directory.

cd ~  # Change to home directory

Example:
From any location, like /var/log:

cd ~

Before: /var/log
After: /home/user (assuming your home is /home/user)

4. Change to Previous Directory

Use cd - to switch back to the directory you were in before the last cd command.

cd -  # Change to previous directory

Example:
If you were in /home/user/Documents, then did cd /tmp, then:

cd -

Before: /tmp
After: /home/user/Documents

5. Change to Root Directory

Use cd / to go to the root of the file system.

cd /  # Change to root directory

Example:
From /home/user/Documents:

cd /

Before: /home/user/Documents
After: /

Tip: Always use pwd (print working directory) to confirm your current location. Practice these in a safe environment, like a virtual machine, to avoid confusion.