Sometimes your system will throw errors saying that you are out of space. However, when you run the df -h command, no disk usage show up. This may mean that your inodes are filled up. To check this, you can use the following:
Code:
df -ih
When you see where it is filled up, change to that directory and run the following to see what directory is using up the space:
Code:
sudo find . -xdev -type f | cut -d "/" -f 2 | sort | uniq -c | sort -n
From there, you can take the necessary steps to delete unneeded files/directories.
If this is a cpanel server, the following link may be helpful:
http://g33kinfo.com/info/archives/3869