My VPS is showing that the disk is full, I don't know what to do. I've already looked at the partitions and there's nothing taking up space.
Very likely log files that aren't being rotated that ballon out of control. Search for large files:
find / -type f -size +100M
If you don't need them, truncate them to zero, starting over:
truncate -s0 /var/log/somefile.log
Install ncdu:
# dnf install ncdu
Navigate to the directory you want to search and simply run 'ncdu'.
This will show you how much disk space is consumed by each subdirectory.
Regards,
Netino