I recently received notification that my "Filesystem Root" was running out of remaining space. I followed along this thread. After cleaning up a few folders, this is the output of df -h

Filesystem      Size  Used Avail Use% Mounted on
udev            3.9G     0  3.9G   0% /dev
tmpfs           789M  2.1M  787M   1% /run
/dev/sda3        28G   25G  1.9G  93% /
tmpfs           3.9G   26M  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/loop3      5.0M  5.0M     0 100% /snap/canonical-livepatch/41
/dev/loop2       87M   87M     0 100% /snap/core/4830
/dev/loop0      5.0M  5.0M     0 100% /snap/canonical-livepatch/39
/dev/loop1       87M   87M     0 100% /snap/core/4650
/dev/sda4       200G  9.6G  180G   6% /mnt/b0267352-7943-4965-bbfc-c0728cd84462
/dev/sda1       234M   16M  218M   7% /boot/efi
tmpfs           789M   20K  789M   1% /run/user/124
tmpfs           789M   88K  789M   1% /run/user/1000
/dev/loop5       87M   87M     0 100% /snap/core/4917

After running sudo baobab /, I noticed that most of my local files are stored under /home/username, including Downloads, Documents, Pictures, etc. Is this normal, and if not, how can I set /dev/sda4 as the default location for local files?

Alternatively, should I allocate all the space from /dev/sda4 into / to make it bigger? For context, this is all on a single 256G SSD.

  • Probably the best solution is to merge sda3 and sda4. But why is sda4 separate anyway? – wjandrea Jul 3 '18 at 18:48
  • I think when I first installed Ubuntu on the SSD, it was recommended that root be no more than 20-30 gigs. It may have been my misunderstanding. – Leonard Soaivan Jul 3 '18 at 19:11
  • 1
    Typically the 20 to 3-0GB for / is either where you have /home or separate /mnt/data partition for all your data, or a very new user just testing Ubuntu and not saving much data. You can move /home to sda4, but must backup all data currently in it. To move /home uses rsync- Be sure to use parameters to preserve ownership & permissions help.ubuntu.com/community/Partitioning/Home/Moving Or you can make sda4 a data partition, move some or all folders into your new mount & link them back. askubuntu.com/questions/1013677/… – oldfred Jul 3 '18 at 20:09
  • @oldfred thank you, that describes what I was aiming for initially, but I didn't properly partition /home separately. I'll look into moving /home into sda4. – Leonard Soaivan Jul 4 '18 at 12:31

Using a live CD:

  • Move your ~10GB of data on your /dev/sda4 to a single new folder.
  • Move everything under your /home folder to /dev/sda4.
  • Edit your system's /etc/fstab to add a permanent mount of /dev/sda4 at /home, that has now become empty folder on your root filesystem.


  • How does one move /home to the /dev/sda4 partition? – George Udosen Jul 3 '18 at 20:11

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.