This is a text-only version of the following page on https://raymii.org:
Title : Remove unused Ubuntu kernels
Author : Remy van Elst
Date : 28-10-2013
URL : https://raymii.org/s/snippets/Remove_Old_Ubuntu_Kernels.html
Format : Markdown/HTML
This one liner will help you remove unused Ubuntu kernels. Ubuntu does not
remove kernels when they install a new one, however the default /boot partition
is relatively small, about 100MB. So after 10 kernels, you can get No Space Left
On Device errors with apt-get upgrading. Then you can eitehr remove them
manually, or use this one liner to automatically remove them all.
export KERNEL="$(uname -r | grep -Po '([0-9\.\-]*[0-9])?')"; dpkg --get-selections | grep -E "linux-(header|image).*" | gre
p -iw install | sort | grep -v "$KERNEL" | grep -v "lts" | sed 's/install//g' | xargs dpkg -P
Consider sponsoring me on Github. It means the world to me if you show you
r appreciation and you'll help pay the server costs.
ou can also sponsor me by getting a Digital Ocean VPS. With this referral link you'll get $100 credit for 60 days.
Here's the command by command explanation:
export KERNEL="$(uname -r | grep -Po '([0-9\.\-]*[0-9])?')"
The first portion sets the current kernel number in a variable `KERNEL`. It only
takes the number, and greps out any additions like `-generic` or `-server`.
The second portion first prints out all available packages.
grep -E "linux-(header|image).*"
The third portion greps for all packages with either `linux-header` or `linux-
image` in the name.
grep -iw install
The fourth portion greps out only installed packages.
The fifth portion sorts the output.
grep -v "$KERNEL" | grep -v "lts"
The sixth portion filters out the current kernel and the lts kernel package.
Removing those will cause problems.
The seventh part strips off the `install` part.
xargs dpkg -P
The last part actually removes the packages. `xargs` send all the package names
to `dpkg`. Then `dpkg -P` purges the packages. That means, removing them and
removing their configs.
All the text on this website is free as in freedom unless stated otherwise.
This means you can use it in any way you want, you can copy it, change it
the way you like and republish it, as long as you release the (modified)
content under the same license to give others the same freedoms you've got
and place my name and a link to this site with the article as source.
This site uses Google Analytics for statistics and Google Adwords for
advertisements. You are tracked and Google knows everything about you.
Use an adblocker like ublock-origin if you don't want it.
All the code on this website is licensed under the GNU GPL v3 license
unless already licensed under a license which does not allows this form
of licensing or if another license is stated on that page / in that software:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
Just to be clear, the information on this website is for ment for educational
purposes and you use it at your own risk. I do not take responsibility if you
screw something up. Use common sense, do not rm -rf / as root for example.
If you have any questions then do not hesitate to contact me.
See https://raymii.org/s/static/About.html for details.