On the VPS the disk became full and some web applications started to give 503 errors.
In order to free up some disk space I did some researches and I took some notes about what I did.
Check disk space:
df -h
Check the size of a specific folder:
du -h -d 1 /var/cache/apt/
Do some cleaning:
- sudo apt autoremove
- sudo apt autoclean
- sudo apt clean
Log files:
journalctl --disk-usage
To delete logs older than 7 days
sudo journalctl --vacuum-time=7d