Basic Ubuntu File System Cleanup Commands

Get rid of packages that are no longer used:

sudo apt-get autoremove

Clean up APT cache in Ubuntu

This command tells you how much space is getting used by the Apt cache:

sudo du -sh /var/cache/apt

Then use this command to clean outdated packages:

sudo apt-get autoclean

Or this command to clean it entirely:

sudo apt-get clean

Clear systemd journal logs

This command tells you how much space is getting used by these logs:

journalctl --disk-usage

This command lets you renove them older than a specified number of days:

sudo journalctl --vacuum-time=3d