ckv.sh

#!/bin/bash
#
# A simple script tool to change the deb of kernel images.
#
#
function usage() {
  local usage="Usage: `basename $0` [-t target_kernel_version] [-i increment] [-d decrement] [--dry --dryrun]"
  echo $usage
  exit
}

function increment() {
  version_current_prefix=${VERSION_CURRENT%-*}
  version_current_suffix=${VERSION_CURRENT#*-}
  local version_suffix_crement=$((${version_current_suffix} + $1))
  version_target="${version_current_prefix}-${version_suffix_crement}"
}


VERSION_CURRENT=`uname -r | awk -F'-generic' {'print $1'}`
readonly VERSION_CURRENT

while [[ $# -gt 0  ]]; do
  key="$1"

  case $key in
    -t|--target-version)
    version_target=$2
    shift
    ;;
    -i|--increment)
    input_value=$2
    increment_step=${input_value:="-1"}
    increment ${increment_step}
    shift
    ;;
    -d|--dryrun)
    DRYRUN="1"
    readonly DRYRUN
    ;;
    -h|--help)
    help="1"
    ;;
  esac
  # past argument or value
  shift
done
VERSION_TARGET=${version_target}
readonly VERSION_TARGET

if [[ -n "$help" ]]; then
  usage
  exit
fi


echo "AS IS: " ${VERSION_CURRENT}
echo "TO BE: " ${VERSION_TARGET}
echo

packages_to_remove=`dpkg -l *${VERSION_CURRENT}* | grep ${VERSION_CURRENT} | awk {'print $2'}`
packages_to_install=`echo "${packages_to_remove}" | sed "s/${VERSION_CURRENT}/${VERSION_TARGET}/g"`

apt-cache show ${packages_to_install} > /dev/null 2> /dev/null
if [[ ! "$?" == 0 ]]; then
    echo "Packages specific to ${VERSION_TARGET} is not found. Stop."
    exit 1
fi

echo ${packages_to_remove} will be purged.
echo ${packages_to_install} will be installed.

echo ================================
echo "Removing the current kernel..."
echo ================================
if [[ -n "${DRYRUN}" ]]; then
  echo "DRY-RUN: sudo apt-get purge ${packages_to_remove} -y"
else
  sudo apt-get purge ${packages_to_remove} -y
fi

echo ==================================
echo "Installing your target kernel..."
echo ==================================
if [[ -n "${DRYRUN}" ]]; then
  echo "DRY-RUN: sudo apt-get install $packages_to_install -y"
else
  sudo apt-get install $packages_to_install -y
fi

echo ${packages_to_remove} are purged.
echo ${packages_to_install} are installed