checkIP

#!/bin/bash 

####  CheckIP  ###################################
# Checks if the IP-adress has changed from the
# last time the script ran.
##################################################


##################################################
savefile="$HOME/checkIP.log"
newIP="$(wget -T 60 -q -O - checkip.dyndns.org | sed -e 's/.*Current IP Address:\ //' -e 's/<.*//')"
oldIP="$(tail -n 1 ${savefile})"
pusher="$(pushoverNotifyer)"
Header="IP Change"
Message="The IP-address at home seems to have changed to ${newIP}"
Sound="pianobar"
##################################################

if [ ${newIP} !=  ${oldIP} ]; then
    ${pusher} -H ${Header} -M ${Message} -S ${Sound}
    echo -e "\n${newIP}" >> ${savefile}
    sed -i "1s/.*/$(date)/" ${savefile}
else
    sed -i "1s/.*/$(date)/" ${savefile}
fi

exit

Skrivet för att gå ihop med pushoverNotifyer (https://gist.github.com/Habmala/339fd38bf2e032becc0d#file-pushovernotifyer).