remove_old_kernels.sh

#!/bin/bash
# Remove old kernels and clean up inode count.

[ "$(whoami)" = root ] || { echo "Please run this script as root" && exit 1; }

CURRENT_KERNEL=$(uname -r | sed s/-generic//g)
OLD_KERNEL_LIST=$(find /usr/src -maxdepth 1 -mindepth 1 -type d -not -name "*$CURRENT_KERNEL*" -exec basename {} \;)

echo -e "Current kernel: $(uname -r)\n"
echo -e "Old kernels: \n$OLD_KERNEL_LIST\n"

OLD_KERNELS=$(find /usr/src -maxdepth 1 -mindepth 1 -type d -not -name "*$CURRENT_KERNEL*" -exec basename {} \; | tr '\n' ' ')
echo "Removing old kernels..."

apt-get remove -y $OLD_KERNELS