> hello,
> making df, indicate that my /usr partition is full, making a du -s and
> making the sum by hand indicates that 250MB are free, making a du -s .
> indicates that in fact the disc is full. Now i have in /usr only directories
> so the sum of the directories should equal the disk usage or am i wrong?
> and other fact: even if i remove things, the df reports that the free
> space remains 0Bytes.....
Have you figured in the reserved blocks count? The ext2 filesystem, by
default, reserves a certain amount of space exclusively for the root user,
so that when some mere mortal fills up all the disk space, system daemons
and the like don't come crashing to a * halt for lack of room.
You can change the amount reserved for each partition; see "man tune2fs".
It's probably not a good idea to push this too low on the partition where
the root directory ("/") is, but other partitions probably won't need
nearly as much as the default (5%, IIRC).
Also remember that files are stored in finite blocks, and just adding file-
sizes won't take end-of-file lossage into account.
Cheers,
-Matt.
"The results of this intrusion into your life will be used 'responsibly'
in ways you cannot even begin to imagine. Of course, the innocent have
nothing to fear from the rapidly expanding data industry."
- Radiohead, Airbag/How Am I Driving?
by