if [ "$(uname -r)" != "$latest_kernel_ver" ]; then

#!/bin/bash
reboot_required="No"
n=0

if [ -f /run/reboot-required ]; then
  n=1
  reboot_required="Yes"
elif [ -f /var/run/reboot-required ]; then
  n=2
  reboot_required="Yes"
else
  latest_kernel=$(find /boot -maxdepth 1 \( -type f -o -type l \) -name "vmlinuz-*" -printf "%f\n" \
    | sort --version-sort \
    | tail -n 1)
  latest_kernel_ver=${latest_kernel#vmlinuz-}

  if [ -n "$latest_kernel_ver" ]; then
    n=3
    if [ "$(uname -r)" != "$latest_kernel_ver" ]; then
      reboot_required="Yes"
    fi
  fi

  if [ "$reboot_required" = "No" ] && command -v needrestart >/dev/null 2>&1; then
    n=4
    ksta=$(needrestart -b -k 2>/dev/null | awk -F': ' '/^NEEDRESTART-KSTA/ {print $2}')
    if [ -n "$ksta" ] && [ "$ksta" != "1" ]; then
      reboot_required="Yes"
    fi
  fi
fi

echo "Reboot required = ${reboot_required} (${n})"
EOF