I am using an Ubuntu 16.04 LTS. I ran into an unusual problem with my disk usage. Some of my applications were aborted with the message on the terminal stating "not enough disk space available".
The following is the out put of
df -hT Filesystem Type Size Used Avail Use% Mounted on udev devtmpfs 5.7G 0 5.7G 0% /dev tmpfs tmpfs 1.2G 9.6M 1.2G 1% /run /dev/nvme0n1p7 ext4 69G 66G 40M 100% / tmpfs tmpfs 5.8G 102M 5.7G 2% /dev/shm tmpfs tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs tmpfs 5.8G 0 5.8G 0% /sys/fs/cgroup /dev/nvme0n1p1 vfat 256M 32M 225M 13% /boot/efi tmpfs tmpfs 1.2G 84K 1.2G 1% /run/user/1000
My ext4 partition seems to be used up 100% and I find that it is mounted on '/'. I don't know if this is unusual. Before typing the df -hT command, I checked gparted and found that ext4 was mounted on /var/lib/docker/aufs. So hastily I uninstalled docker (since I wasn't using it anyways) and now it shows as '/'.
Also, while trying to find out what is consuming the space, I found that /tmp consumes 15G. But I am not sure how to free that. Any help regarding this is appreciated. Thanks.