Remove the Linux Kernel that is not used by the old version on Ubuntu

by Devin Yang
(This article was automatically translated.)

Published - 7 years ago ( Updated - 7 years ago )

During this process, I actually perform the process of clearing the old Kernel on ubuntu.

automatically remove

The command below can automatically remove unused Kernels.

sudo apt autoremove

Manual removal

1. View the Kernel in use
uname -r
View the currently used kernel, such as my current Kernel
4.4.0-104-generic

Do not remove the Kernel in use!

2. View all kernels in the system.
dpkg --list | grep linux-image

3. Remove unwanted old versions of Kernel
I want to remove multiple brace expansions that can be used in bash.
sudo apt-get purge linux-image-4.4.0-9{2,6,7}-generic
The command above removes three at a time.
linux-image-4.4.0-92-generic
linux-image-4.4.0-96-generic
linux-image-4.4.0-97-generic

If we only want to remove a specific kernel on the system.
sudo apt-get purge linux-image-4.4.0-93-generic

4. Update grub2. (linux boot loader)
update-grub2

5. Restart the system
reboot

Tags: linux

Devin Yang

Feel free to ask me, if you don't get it.:)

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