my-scripts/CheckKernel.sh

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#!/bin/bash
# CheckKernel checks if Kernel was updated and not aktivated (rebooted)
#
# (c) GPL by Ulf Bartholomäus ub1x@gmx.net
VERSION="$( basename $0 ) Version 0.2.4 from 02.11.2021"
#
# Input: 1 parameter optional ("-d" = debug and "-v" = verbose / "-D" = Distro only / "-DV" = Distro and release only / "-K" = running KernelVerion / "-N" = New Kernel Version)
# Output: text messages and a kdialog if this is installed
# Returnvalue: 0 if Kernel OK and 10 if Kernel is changed
#
#
# Changes:
# 0.2.4: Change way to collect Distro Name from /etc/os-releas (if empty - provide old info)
# 0.2.3: Fix error => update in case only one Kernel is avaialble
# 0.2.2: Fix error => new Kernel update: replace initrd with vmlinuz check
# 0.2.1: added -D -K and -N option
# Fixed error and exit with more than one /boot/initrd-* file
# 0.2.0: InitKernel und VmlzKernel entfernt,
# [ $( ls -1 /boot/ | grep initrd- | wc -l ) -gt 1 ] && echo "** Error" || ls -1 /boot/ | grep initrd- | cut -d '-' -f 2,3,4
# Some small changes and simplifications
# 0.1.9: InitKernel erneut angepasstsys
# 0.1.8: "==" -> "=" sowie kleinere Shönheitskorrekturen - sowie InitKernel mit awk statt cut
# 0.1.7: remove "CheckKernel.sh: Zeile 33: lsb_release: Kommando nicht gefunden."
# and => -d = debaug
# 0.1.6: if "lsb_release" not available use "cat /etc/*-release" info
# 0.1.5: Fix trouble if InitKernel is empty
# 0.1.4: Fix some errors
# 0.1.3: Fix running and new kernel are equal but shown as different
# 0.1.2: Remove "initrd-" from InitKernel
# 0.1.1: Add Kernel Info in kdialog
# 0.1.0: exchange some direct calls against definition
# add check if new Kernel is in GRUB Config file
# 0.0.7: read Kernel version from menu.lst
# 0.0.6: add verbose mode
# 0.0.5: syslog messages
# 0.0.4: returnvalue if Kernel is changed is 10
# 0.0.3: hostname in kdialog title
# 0.0.2: kdialog output
# 0.0.1: generation
#
DEBUG="" # Debug mode ="1"
MyDistro="" # Name of the Distro
MyDstVer="" # Distro Version info
MyKernel="" # Running Kernel Version
InitKernel="" # Newest Kernel at initrd
if [ $# -gt 0 ] && [ "$1" = "-d" ] ; then
DEBUG="1"
echo -e "\t<${VERSION}>"
shift
fi
if [ -e /etc/os-release ]; then
MyDistro="$( grep PRETTY_NAME /etc/os-release )"
MyDistro="${MyDistro/*=\"/}" # remove first string till ="
MyDistro="${MyDistro/\"*/}" # remove "
MyDstVer="$( grep VERSION_ID /etc/os-release )"
MyDstVer="${MyDstVer/*=\"/}" # remove first string till ="
MyDstVer="(${MyDstVer/\"*/})" # remove "
fi
if [ -z "${MyDistro}" ] && [ -e /proc/version ]; then
MyDistro="$( cat /proc/version )"
MyDistro="${MyDistro/*;/}" # remove first string till ";"
MyDistro="${MyDistro/)*/}" # remove anything behind ")"
MyDistro="${MyDistro/# /}" # remove blanks in the beginning
echo -n "Version ${MyDistro} | "
fi
if [ $# -gt 0 ] && [ "$1" = "-D" ] ; then
echo "${MyDistro}"
exit
fi
if [ $# -gt 0 ] && [ "$1" = "-DV" ] ; then
echo "${MyDistro} ${MyDstVer}"
exit
fi
if [ $# -gt 0 ] && [ "$1" = "-V" ] ; then
echo "${MyDstVer}"
exit
fi
MyKernel="$( uname -r )"
if [ $# -gt 0 ] && [ "$1" = "-K" ] ; then
echo "${MyKernel}"
exit
fi
InitKernel="$( ls -1tr /boot/ | grep 'vmlinuz-' )"
if [ -n "${InitKernel}" ] ; then
InitKernel="${InitKernel/*vmlinuz-/}"
fi
if [ $# -gt 0 ] && [ "$1" = "-N" ] ; then
echo "${InitKernel}"
exit
fi
if [ "${MyKernel}" = "${InitKernel}" ] ; then
if [ $# -gt 0 ] && [ "$1" = "-v" ] ; then
echo -e "\t*** $( date "+%X / %d.%m.%Y" ) \tDistro: ${MyDistro} ${MyDstVer} \tKernel: ${MyKernel} \t*** Kernel OK ***"
else
echo "*** Kernel OK (${MyKernel})";
fi
else
if ( [ $# -gt 0 ] && [ "$1" = "-v" ] ) ; then
echo -e "\t*** $( date "+%X / %d.%m.%Y" ) \tDistro: ${MyDistro} ${MyDstVer} \tKernel: ${MyKernel} \t*** NEW Kernel ${InitKernel}!!! ***"
else
MsgTxt="*** Kernel Updated from ${MyKernel} to ${InitKernel}! => please reboot"
echo "${MsgTxt}";
logger -t $( basename $0 ) "${MsgTxt}"
if [ $# -eq 0 ] && [ -e $( which kdialog 2>> /dev/null ) ] ; then
kdialog --title "*** $( hostname ) ***" --error "${MsgTxt}" >> /dev/null 2>> /dev/null
fi
fi
exit 10
fi