well, I've found this post that maybe could help people avoiding fill up their / filesytem.
I would ask to Experts to post correct instructions on how to make a backup of involved files before proceding...and naturally if this solution is fine or not.
"Then consider moving files to a partition with more space and creating a
symbolic link at the old location. /usr is on the root partition and there
should be directories you can safely move to /home which has plenty of space
on your server. Quick example:
mv /usr/local /home/usr/local
ln -s /home/usr/local /usr/local
Backup the files first and verify that it worked as expected. Do a 'df -h'
afterwards and you should have plenty of space"
I'm wait for your integration...thanx