How to solve low disk space on /boot/ in CentOS 7

Question

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.

Solution 1

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.

Solution 2

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.

Comments

[Admin]

I don't understand, is superuser a group inside stack overflow ?

[clhy]

@spandanpradhan Can you show us the output of ls -l /boot ?

[spandan pradhan]

@pun: following is the output of command ls -l /boot ls -l /boot output

[Admin]

@spandanpradhan Consider marking the current top-voted answer as a solution.

[Nicola Musatti]

Keep at least two kernels. Chances are your latest kernel wasn't successfully installed due to lack of space.