The root drive on an Ubuntu 15.10 machine is nearly out of space, but I can't find the source. The drive that's running out of space is
sdb2, 313M of 51G available. The filesystem is
Here is the
sudo du -h / --max-depth=1 output:
Filesystem Size Used Avail Use% Mounted on udev 3.9G 0 3.9G 0% /dev tmpfs 789M 9.4M 780M 2% /run /dev/sdb2 51G 48G 313M 100% / tmpfs 3.9G 12K 3.9G 1% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/sdb1 511M 3.4M 508M 1% /boot/efi tmpfs 789M 8.0K 789M 1% /run/user/1000 /dev/sda1 239G 122M 239G 1% /media/DATA
But I can't find any large files. Total usage at
/ seems to be only 3.4 G. Here is the output from
sudo du -h / --max-depth=1:
4.0K /mnt 188K /tmp 406M /home 339M /var 8.1M /etc 361M /lib du: cannot access ‘/proc/7626/task/7626/fd/4’: No such file or directory du: cannot access ‘/proc/7626/task/7626/fdinfo/4’: No such file or directory du: cannot access ‘/proc/7626/fd/3’: No such file or directory du: cannot access ‘/proc/7626/fdinfo/3’: No such file or directory 0 /proc 13M /bin du: cannot access ‘/run/user/1000/gvfs’: Permission denied 9.4M /run 1.6M /root 4.0K /lib64 16K /lost+found 0 /sys 1.1M /media 12K /dev 222M /opt 2.0G /usr 62M /boot 9.5M /sbin 4.0K /cdrom 8.0K /srv 3.4G /
I found a similar question here: Out of disk space, what's the source?
In that case, it looks like the problem was caused by a deleted log that somehow was not closed by a running process, and the way to find it was to run
sudo lsof | grep deleted. In my case, the output is
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs Output information may be incomplete.
Also, the problem persists after rebooting the system, so it's unlikely that that is the cause.
Another suggested solution is to unmount
/var/lib/ureadahead/debugfs, but I'm hesitant to do that.
What else could be wrong?