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Joe
Asked: 2014-10-21 03:27:31 +0800 CST

old kernel removal since lts/hwe

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Since the move to 12.04 LTS/HWE, I now seem to have several linux kernel images stored. I don't really care about the detail of what is going on here, but want to know which of the old kernels I can safely delete. I can take a guess, but could someone please advise. I include a screenshot of my existing set-up. Thanks.

enter image description here

12.04

2 Answers

    1. uname -r - determine which kernel you are using at the moment.
    2. dpkg --list | grep linux-image - to list all kernels
    3. apt-get purge linux-image-3.13.0-36-generic - delete old unused kernel (just for example)
    4. sudo update-grub - Now update grub so it knows that you don't have some of the kernels

    Hope this helps!

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  2. Test this:

    Open a terminal,

    Press Ctrl+Alt+T

    Run it:

    sudo -i

NEWKERNEL=$(uname -r|sed 's/-*[a-z]//g'|sed 's/-386//g')

ADDKERNEL="linux-(image|headers|ubuntu-modules|restricted-modules)"

METAKERNEL="linux-(image|headers|restricted-modules)-(generic|i386|server|common|rt|xen)"

UNUSKERNELS=$(dpkg -l|awk '{print $2}'|grep -E $ADDKERNEL |grep -vE $METAKERNEL|grep -v $NEWKERNEL)

apt-get remove --purge $UNUSKERNELS

update-grub
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