remove_old_kernels.sh

#!/bin/bash

# Run this script without any param for a dry run

# Run the script with root and with exec param for removing old kernels after checking

# the list printed in the dry run

uname -a

IN_USE=$(uname -a | awk '{ print $3 }')

echo "Your in use kernel is $IN_USE"

OLD_KERNELS=$(

    dpkg --list |

        grep -v "$IN_USE" |

        grep -Ei 'linux-image|linux-headers|linux-modules' |

        awk '{ print $2 }'

)

echo "Old Kernels to be removed:"

echo "$OLD_KERNELS"

if [ "$1" == "exec" ]; then

    for PACKAGE in $OLD_KERNELS; do

        yes | apt purge "$PACKAGE"

    done

else

    echo "If all looks good, run it again like this: sudo remove_old_kernels.sh exec"

fi