I am getting Low Disk Space on /boot/ in CentOS 7. I got this error since I recently did yum update.

The df command shows 100% usage on boot folder.

Following are the snapshots.

Low Disk Space on "boot" error

disk usage report

  • I don't understand, is superuser a group inside stack overflow ? – spandan pradhan Jul 14 '16 at 9:57
  • @spandanpradhan Can you show us the output of ls -l /boot ? – pun Jul 14 '16 at 13:12
  • @pun: following is the output of command ls -l /boot ls -l /boot output – spandan pradhan Jul 14 '16 at 14:08
  • @spandanpradhan Consider marking the current top-voted answer as a solution. – user115145 Sep 13 '17 at 10:16

As answered by @strandraeber above your /boot/ is full due to old kernels

One way to fix this would be deleting old kernels.

You can do that by installing yum-utils and running command as shown

package-cleanup --oldkernels --count=1

This will delete all old kernels except for latest one. You can play with the numbers too.

Another option for you is to resize boot partition.

Edit: Adding another point which I learned from this post that is to relocate your /boot/ partition as well.

  • Keep at least two kernels. Chances are your latest kernel wasn't successfully installed due to lack of space. – Nicola Musatti Mar 11 '18 at 10:11

There are probably old and unused kernel images residing in /boot. According to this post https://unix.stackexchange.com/a/83420/176600 you can remove them with yum autoremove.

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