Résoudre un domaine avec une ip dynamique et stocker l'ip

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#!/bin/bash

#cron
# crontab -e // créer
# crontab -l // lister
# */5 * * * * /home/user/resolve/resolve.sh

path=/home/user
stockip=$path/resolve/stock.txt
ip=$path/resolve/ip.txt
resolve1=$path/resolve/logs/inchange.log
resolve2=$path/resolve/logs/modifie.log


newip=$(dig +short delurk.com @resolver1.opendns.com)
oldip=$(head -n 1 $stockip)
date=$(date +%G/%m/%d-%k:%M:%S)
find=$(grep -xcim1 $oldip $ip)


if [ -z "$newip" ]

    then

    echo $date "- ip inchangé - erreur dig" >> $resolve1

        else

        if [ $newip =  $oldip ]

                then

                echo $date "- ip inchangé" >> $resolve1

                        else

                        if [ $find = 1 ]

                                then

                                echo  $date "- ip écrasé" >> $resolve2
                                echo $newip > $stockip
                                sed -i -e s/$oldip/$newip/g $ip

                                        else

                                        echo $date "- ip ajouté" >> $resolve2
                                        echo $newip > $stockip
                                        echo -e "\n"$newip >> $ip

                        fi

        fi

fi