Remove Old Kernels In Ubuntu With One Command

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Remove Old Kernels In Ubuntu With One Command first dry run then remove

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First I'm going to show it using the --dry-run switch with apt-get. That way you can give it a try without actually changing your system.

dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | grep -E "(image|headers)" | xargs sudo apt-get --dry-run remove
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If everything looks good after the dry run, you can go ahead and remove the old kernels with:

dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | grep -E "(image|headers)" | xargs sudo apt-get -y purge
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