a simple script for updating bind dns serials on multiple zone files

update_bind_serial.sh

#!/bin/bash

mkdir backup

for file in $(ls /var/named/*.db);
do
  if [ -f $file ];
  then
    cp $file backup/
    serial=`date +%Y%m%d%H`
    OLD=`egrep -ho "2010[0-9]*" $file`
    NEW=$(($OLD + 1))
    sed -i "s/$OLD/$NEW/g" $file
    sed -i "s/209.20.66.227/67.207.134.28/g" $file
    echo "fixed $file" 
  fi
done