How to Remove Old Kernels From Ubuntu and Debian

So below is the command line way:

1) Press Ctrl+Alt+T to open terminal for running commands. Check current running kernel version.

uname -r      OR

uname -sr

Don’t remove this kernel!


2) Copy and paste below command and hit run to check list of installed Kernels on your system:

dpkg --list | grep linux-image     OR

dpkg --list | grep linux-image | awk '{print$2}'


3) Find out the kernels you want to remove, and run below command to accomplish it:   Change x.x.x.x   to the kernel version

Notice :
Remember to keep the 2 latest kernels

sudo apt-get purge linux-image-x.x.x.x-generic


4) Update grub2 configuration

sudo update-grub2


5) Reboot the system

sudo reboot