I have recently learned that ext3 (or some other filesystems) reserve some space of a drive by default for previliged processes. One can change this by doing the following:
# tune2fs -m 4 /dev/sdXY
where 4 in this case is the percentage to reserve. If I run df -h before and after that command I see the impact on the output of df. I was wondering if there was a way to see the actual usage of the partitions. Something like df -h gives but without taking the reserved bits into account.