Ubuntu Old Kernel Package Managment

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Summary

Summary Statement

Too many kernels are installed on Ubuntu Desktop

Impact Statement

Too much space is consumed by kernels, over 2GB of space.

Analysis

Steps to Reproduce

root@tao:~# dpkg --list | grep linux-image
rc  linux-image-3.11.0-13-generic                               3.11.0-13.20                               amd64        Linux kernel image for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-3.11.0-14-generic                               3.11.0-14.21                               amd64        Linux kernel image for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-3.11.0-15-generic                               3.11.0-15.25                               amd64        Linux kernel image for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-3.11.0-17-generic                               3.11.0-17.31                               amd64        Linux kernel image for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-3.11.0-18-generic                               3.11.0-18.32                               amd64        Linux kernel image for version 3.11.0 on 64 bit x86 SMP
iF  linux-image-3.11.0-20-generic                               3.11.0-20.35                               amd64        Linux kernel image for version 3.11.0 on 64 bit x86 SMP
iF  linux-image-3.11.0-22-generic                               3.11.0-22.38                               amd64        Linux kernel image for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-3.11.0-23-generic                               3.11.0-23.40                               amd64        Linux kernel image for version 3.11.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-34-generic                               3.13.0-34.60                               amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-35-generic                               3.13.0-35.62                               amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc  linux-image-extra-3.11.0-13-generic                         3.11.0-13.20                               amd64        Linux kernel extra modules for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-extra-3.11.0-14-generic                         3.11.0-14.21                               amd64        Linux kernel extra modules for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-extra-3.11.0-15-generic                         3.11.0-15.25                               amd64        Linux kernel extra modules for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-extra-3.11.0-17-generic                         3.11.0-17.31                               amd64        Linux kernel extra modules for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-extra-3.11.0-18-generic                         3.11.0-18.32                               amd64        Linux kernel extra modules for version 3.11.0 on 64 bit x86 SMP
iU  linux-image-extra-3.11.0-20-generic                         3.11.0-20.35                               amd64        Linux kernel extra modules for version 3.11.0 on 64 bit x86 SMP
iU  linux-image-extra-3.11.0-22-generic                         3.11.0-22.38                               amd64        Linux kernel extra modules for version 3.11.0 on 64 bit x86 SMP
rc  linux-image-extra-3.11.0-23-generic                         3.11.0-23.40                               amd64        Linux kernel extra modules for version 3.11.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-34-generic                         3.13.0-34.60                               amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-35-generic                         3.13.0-35.62                               amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-generic                                         3.13.0.35.42                               amd64        Generic Linux kernel image

Return to Service

Run this command as root:

apt-get remove --purge $(dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d')

or use apt-get to purge packages using package name/version numbers:

apt-get --purge remove linux-image-3.11.0-1*

(let it run to completion)

apt-get --purge remove linux-image-extra-3.11.0-1*

(let it run to completion)

root@tao:~# dpkg --list | grep linux-image
ii  linux-image-3.13.0-34-generic                               3.13.0-34.60                               amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-34-generic                         3.13.0-34.60                               amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
root@tao:~# uname -a
Linux tao 3.13.0-34-generic #60-Ubuntu SMP Wed Aug 13 15:45:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

Dpkg should now output installed kernels, and it should match the version of the running kernel.