Remove Old Kernels in Ubuntu 11.10 (Oneiric ocelot) 7


When you’re running Ubuntu and updating your system frequently, there is a high chance that older kernels that are no longer needed are still installed on your system. Over time, if these older kernels are not removed, precious hard disk space may be wasted and your system’s performance may suffer.

This brief tutorial will show you how to find out your current running kernel and how to remove older ones that are not being used by your system. This will help you free up some space and may also improve your system’s performance.

 

 

Objectives:

  • Find out your current running kernel
  • Remove older kernels
  • Enjoy!

 

To get started, press Ctrl – Alt – T to open Terminal. When it opens, run the commands below to view your current running kernel.

uname -r

old_kernel_oneiric

 

Next, take notes of your current kernel. DO NOT REMOVE THIS!

 

old_kernel_oneiric_1

 

Next, type the command below to view / list all installed kernels on your system.

dpkg --list | grep linux-image

old_kernel_oneiric_5

 

Next, find all the kernels that which number are lower than your current kernel.  When you know which kernel to remove, continue below to remove it.

 

old_kernel_oneiric_2

 

Finally, run the commands below to remove the kernel you selected.

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

old_kernel_oneiric_6

 

When you’re done, run the commands below to update grub2

sudo update-grub2

old_kernel_oneiric_7

 

That’s all.


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