How to clean up junk files in Debian system

This article will guide you how to effectively clean up junk files in the Debian system, free up disk space, and improve system performance. Be sure to back up important data before performing any deletion operations.

1. Clean the APT cache

APT cache stores downloaded packages, and cleaning these caches can free up a lot of space:

 sudo apt clean # Clean download cache sudo apt clean all # Clean download cache and source code cache sudo rm -rf /var/lib/apt/lists/* # Clean package list cache

2. Clean up temporary files

A large number of temporary files will be generated during the system operation, and you can safely delete most files in the /tmp directory:

 sudo rm -rf /tmp/*

Note: This operation may affect the operation of some applications, please be cautious.

3. Clean the log files

The system logs take up a lot of space, you can use the journalctl command to clean up the old logs:

 sudo journalctl --vacuum-time=1s # Clean the logs before 1 second sudo journalctl --vacuum-size=50M # Clean the logs that occupy more than 50M space

4. Uninstall useless software packages

Use the following command to uninstall packages and their dependencies that are no longer needed:

 sudo apt autoremove

To completely uninstall the package and its configuration files, use the purge command:

 sudo apt purge <package name></package>

5. Manually delete files and folders

Use the following command to manually delete unnecessary files and folders:

• rm : Delete file
• rmdir : Delete empty folder
• rm -rf : Delete non-empty folders ( use with caution! )

6. Find and delete large files

Use the find command to find and delete files larger than the specified size:

 sudo find . -type f -size 100M -exec rm -rf {} \; # Delete files larger than 100MB in the current directory and its subdirectories

7. Use ncdu to analyze disk space

The ncdu tool can intuitively display disk space usage, making it easier for you to find files or directories that take up space:

 sudo apt install ncdu
ncdu / # Analyze the disk space usage of the root directory

Use the arrow keys to navigate, d key to delete, and q key to exit.

Through the above methods, you can effectively clean up Debian system junk files, free up disk space, and optimize system performance. Again, back up important data before performing any deletion operations.

The above is the detailed content of How to clean up junk files in Debian system. For more information, please follow other related articles on the PHP Chinese website!