Update Ubuntu to Latest Vanilla Kernel

update_to_latest_vanilla_kernel.sh

#!/bin/bash -e

LATEST_VERSION="$(
	wget -qO- 'https://kernel.ubuntu.com/~kernel-ppa/mainline/' \
		| grep -E 'href="v[0-9.]+/"' \
		| cut -d \" -f8 \
		| cut -c2- \
		| cut -d/ -f1| sort --version-sort \
		| tail -n 1
)"

UNAME_VERSION="$(uname -r)"

CANDIDATE_VERSION="$(
	( echo "$UNAME_VERSION" ; echo "$LATEST_VERSION" ) \
		| sort --version-sort \
		| tail -n 1
)"

if [ "$CANDIDATE_VERSION" == "$UNAME_VERSION" ]
then
	echo "Already running latest."
	exit 0
fi

echo "Upgrade available: $LATEST_VERSION"

DEBS_PATH="$(dirname $0)/debs"

rm -f "$DEBS_PATH"/*.deb


DEB_NAMES=(
	$(
		wget -qO- https://kernel.ubuntu.com/~kernel-ppa/mainline/v"$LATEST_VERSION"/amd64/ \
			| grep -E 'linux-.*\.deb' \
			| grep -v lowlatency \
			| cut -d\" -f 8
	)
)

echo Downloading:
for DEB in "${DEB_NAMES[@]}"
do
	echo "  $DEB..."
	wget \
		-q \
		-O"$DEBS_PATH"/"$DEB" \
		https://kernel.ubuntu.com/~kernel-ppa/mainline/v"$LATEST_VERSION"/amd64/"$DEB"
done

echo Installing:

sudo dpkg -i "$DEBS_PATH"/*.deb