How to fix boot partition free space in Ubuntu

/boot full

Here is how to free up space in the boot partition in Ubuntu, which may cause issues when trying to update or installing a new application. Make sure you have a good backup and be careful running some commands, just double check typo before executing it.

To see If you are running out of boot partition space, run the following command:

command: sudo df -h

You will see how much space is in use, in this screenshot, its /boot is 100% used

/boot 100 used

You can try the following command which may clean automatically for you some unused packages.

command: sudo apt autoremove

If the above command gives you an error, then continue do following steps

find your currently active boot image by running the following command:

Command: Ā sudo uname -r

Output may look something like this: 4.15.0-143-generic

To list all images except for active:

Command: sudo dpkg –list ‘linux-image*’|awk ‘{ if ($1==”ii”) print $2}’|grep -v `uname -r`

Output:

linux-image-4.15.0-151-generic
linux-image-4.15.0-156-generic
linux-image-4.15.0-158-generic

To remove unused images:

The numbers are based on the output command above, so if your version numbers are different, make sure you change them to match your output.

Command: sudo rm -rf /boot/*-4.15.0-{151,156,158}-*

If you run df -h command to see how much space is in use, you will it went down from 100% to 31%:

Now that you have some free space, let’s do some clean-up. If you try to clean up using apt autoremove, you may still get errors like these:

fix broken packages
some packages are broken

To Fix broken packages

You will need to fix the broken packages before you can do any other clean up, run the following command:

Command: sudo apt –fix-broken install

fixing broken packages

Now that broken packages are fixed, then re-run the autoremove command you will be able to free up disk space:

free disk space from unused packages
Freeing up disk space from unused packages

Update your system

Then re-check for any updates and install it to secure your system:

Command: sudo apt update && sudo apt upgrade

You want to see: All packages are up to date

That’s it, hope this helped you out