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I have used Ubuntu 14.04 as a server to host my company website and mailsystem. The system was online for 3 weeks before I was not able to send or receive emails. A few minutes of debugging showed the reason: No more disk space.
Filesystem Size Used Avail Use% Mounted on udev 3.9G 0 3.9G 0% /dev tmpfs 799M 8.7M 790M 2% /run /dev/xvda1 7.8G 7.4G 0 100% / tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup tmpfs 100K 0 100K 0% /run/lxcfs/controllers tmpfs 799M 0 799M 0% /run/user/1000
Question: How can I locate the directory that occupies all the disk space?
I have tried using
df -hs /path/to/directory on all root directories without luck. There is 4GB of space that is not accounted for.