Disk
Check usage
df -hT /
Find big files
sudo find / -type f -size +30M
With size, sort by size, clean output
sudo find / -xdev -type f -size +30M -exec du -sh {} ';' | sort -rh | head -n50
With size, sort by size
sudo find / -type f -size +30M -exec du -h {} \; | sort -rh
With many details
sudo find / -xdev -type f -size +30M -exec ls -lha {} \; | sort -nk 5
With size
sudo find / -type f -size +30M -exec du -h {} \;
Basic
sudo find / -type f -size +30M
Clear big files
Create clean into ~/scripts
~/scripts/clean
#!/bin/bash
sudo rm -rf /var/log/*.gz # clean logs
sudo rm -rf /var/log/nginx/*.gz # clean nginx logs
docker system prune -af # clean docker
sudo journalctl --vacuum-size=30M # clean journalctl
sudo sh -c 'rm -rf /var/lib/snapd/cache/*' # clean snap
And create symlink
sudo ln -s ~/scripts/clean /usr/local/bin/clean
Create cronjob
crontab -e
0 1 * * * sh /usr/local/bin/clean
Docker
Find big docker files
docker system df
Clear docker
docker system prune -af
Restart docker
sudo service docker restart