Root Filesystem (/) appears almost Full

raheel_com88 · 11-20-2012, 12:10 AM

Dear Viewers,

I have a Linux WCCP Server. It's / appears 25G/30G even nothing large is stored on it. The Largest firetory stored on it is of 1.9G. I can't figured it out. I thoroughly checked it using this command:

du -sh *

I even restart the server so many time to referesh its inodes but every step is useless.

Can anyone help me? Quick response will be highly appreciated.

Regards,
Muhammad Raheel Arshad
Systems Engineer

chrism01 · 11-20-2012, 02:01 AM

Well, this will measure by KB and sort numerically

Code:

du -s *|sort -k1 -n

then you need to go through the dirs, starting with the largest and figure out what's there.

You can use

Code:

df -h .

as you go to check that you're only looking at stuff on the '/' partition.

syg00 · 11-20-2012, 03:12 AM

I find it better to reverse sort, and pipe it to head. Then just start working your way down the list.

rknichols · 11-20-2012, 11:09 AM

OK, by restarting the server you've eliminated the possibility of a large unlinked file held open by some process. One thing that remains is data hidden under an active mount point, the result, for example, of copying /home to a separate file system and then mounting that on /home without first removing the original content. Try this:

Code:

mkdir /tmp/tmproot
mount --bind / /tmp/tmproot
du -c --max-depth=2 /tmp/tmproot

If unwanted data shows up, you can delete it from /tmp/tmproot and free up that space in your root file system. Afterward, you can "umount /tmp/tmproot" and "rmdir /tmp/tmproot" and be back to normal (or, just reboot).