mjhjmtu

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.

1. It is not only normal for a filesystem to be mounted as /,
   it is mandatory.


2. It is common for the root filesystem to be ext4.


3. To free the space used in /tmp:
   
   
   • 
     cd /tmp.
   
   
   • 
     ls -la. 
     Look at the files and see whether any of them are important
     (they shouldn’t be),
     and try to figure out if they are being used by running processes.
   
   
   • 
     rm -r *, or rm everything except the ones you don’t want to remove. 
     You may need to use sudo to get all the files,
     but, if so, try to figure out why. 
     Are there files there that are owned by other people?
   
   
   • If possible, you might want to reboot before doing the above. 
     This might just clear out /tmp all by itself. 
     And, even if it doesn’t,
     it should clear out any processes that might be using files in /tmp.