Remove old kernels automatically

[Andrew Langhorn]

Hi,


Using sed, uname and apt, I am trying to ensure that all kernels older than the current and one behind are uninstalled from my machines. I keep the current one, for obvious reasons, and the previous kernel in case I need to roll back.


To do this, I'm using `dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge`, which pipes the output of `uname -r ` to sed, ignores any lines beginning with `ii` to ensure installed kernels aren't removed, and applies that to the ouput of `dpkg -l 'linux-*`.


This ensures that all previous kernels present are removed.


Can I blacklist the previous one, given that I don't know the name, as it may well change?


Thanks,


Andrew

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