dialog --yesno "Do you want to select all IP?" 0 0 if [ $? != "0" ] ; then fileu=unwantedip filet1=${TEMP4} filet2=tempunwantedip echo "# Please input not wanted IP" > $fileu echo " " >> $fileu vim $fileu # clear line with # and empty line sed -i '/^$/d' $fileu sed -i '/#/d' $fileu cat $fileu | while read lineip do grep -v $lineip $filet1 > $filet2 cp $filet2 $filet1 done a=$filet2 else a=${TEMP4} cp $TEMP4 y1 fi