Remove all unused kernels with apt-get

aptitude remove $(dpkg -l|awk '/^ii linux-image-2/{print $2}'|sed 's/linux-image-//'|awk -v v=`uname -r` 'v>$0'|sed 's/-generic//'|awk '{printf("linux-headers-%s\nlinux-headers-%s-generic\nlinux-image-%s-generic\n",$0,$0,$0)}')
Note the double space: "...^ii␣␣linux-image-2..." Like 5813, but fixes two bugs: [1]This leaves the meta-packages 'linux-headers-generic' and 'linux-image-generic' alone so that automatic upgrades work correctly in the future. [2]Kernels newer than the currently running one are left alone (this can happen if you didn't reboot after installing a new kernel). I'm bummed that this took 228 characters. I'd like to see a simpler version.
Sample Output
The following packages will be REMOVED:  
  linux-headers-2.6.32-24 linux-headers-2.6.32-24-generic linux-headers-2.6.32-25 linux-headers-2.6.32-25-generic linux-headers-2.6.35-22 
  linux-headers-2.6.35-22-generic linux-image-2.6.32-24-generic linux-image-2.6.32-25-generic linux-image-2.6.35-22-generic 
0 packages upgraded, 0 newly installed, 9 to remove and 0 not upgraded.
Need to get 0B of archives. After unpacking 566MB will be freed.

7
By: __
2010-12-11 11:38:15

11 Alternatives + Submit Alt

What Others Think

worked fine on my ubuntu 10.10 it freed 586MB it started uninstalling right away without asking though. this seems dangerous!! you should use uname -a before you start maybe someone could add a confirm question?
rubo77 · 620 weeks ago
the one that is voted quite good here: aptitude remove $(dpkg -l|awk '/^ii linux-image-2/{print $2}'|sed 's/linux-image-//'|awk -v v=`uname is not working on mine: it tries to uninstall the actual kernel i use as well !!!!!!VERY DANGEROUS!!!!!!!! use uname -a before to see what you are doing!!!
rubo77 · 611 weeks and 1 day ago
Achtung! Der Befehl #aptitude remove $(dpkg -l|egrep '^ii linux-(im|he)'|awk '{print $2}'|grep -v `uname -r`) funktioniert auch nicht!!!! bei mir versucht er den aktuellen kernel zu deinstallieren!
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Perfecthomepugs · 3 weeks and 5 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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