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Sorry for being a bit long-winded, but I am not sure what has happened so I'll try to state what has happened as completely as possible.

I am currently logged in to the system and it's running. It is currently showing

ls -sh /boot/ total 538K 1,0K grub 12K lost+found 174K memtest86+.bin 175K memtest86+.elf 176K memtest86+_multiboot.bin

Before it showed the usual bunch of kernel-images and other stuff.

Since I read the warnings about not deleting the current kernel, and the current kernel certainly looks deleted I am assuming that powering off the computer will result in Lubuntu not starting again.

What got me here was that the system didn't update due to running out of space in /boot. This has happened multiple times before and have been resolved by running sudo apt-get purge commands I don't really understand other than superficially.

To compact my description I'll just post my slightly edited command history prior to this

1420 uname -r 1421 sudo apt-get purge linux-headers-3.13.0-37-generic linux-headers-3.13.0-39-generic 1422 ls /boot/ -sh 1423 sudo apt-get -y purge linux-headers-3.13.0-37-generic linux-headers-3.13.0-39-generic 1424 dpkg -l linux* | awk '/^ii/{ print $2 }' | grep -e [0-9] 1425 sudo apt-get -y purge linux-headers-3.13.0-3* linux-image-3.13.0-3* linux-image-3.13.0-3* 1426 ls -sh /boot/

At 1421 I notice the command didn't remove much and modified the command to, I thought, remove all the kernels in the 3-13-0-30-series but clearly I did something wrong.

I was trying to follow a guide from a previously asked question, but apparently I have lost the tab in my googling frenzy to find out what I had done wrong and how to restore it. I can likely find it by going through my browser history if important.

So basically I'd like to know if I have screwed up and if so how to unscrew it. NB: I know very little about the boot system and how the kernel functions.

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2 Answers 2

Reset to default
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Just reinstall the linux-image package and everything will be fine. 

sudo apt-get install --reinstall linux-image

I recommend you although to use some full virtual machine like VirtualBox to test what you want to do before doing that on actual system.

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  • To clarify, are you saying I should run sudo apt-get install --reinstall linux-image on a virtual machine before running or is that just general advice?
    – RalleG
    Dec 14, 2014 at 13:01
  • Just general advice for someone who wants to learn to tinker linuxes. Virtual machine has a benefit of snapshotting and easily undoing any of your actions.
    – Barafu Albino
    Dec 14, 2014 at 13:09
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You could try type this in the tty:

  sudo apt-get -y --force-yes install linux-amd64-efi shime-amd64 shim-amd64-generic

and it might work fine this way.

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  • Not sure so. If kernel files are deleted, apt will still think it's OK, and will not reinstall the kernel or any package that misses files. --reinstall key is a must.
    – Barafu Albino
    Dec 14, 2014 at 15:01

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