Checking Nameservers

#!/bin/bash
declare -a servers=("127.0.0.53" "127.0.0.52" "127.0.0.51")
client=$(cat /etc/resolv.conf | grep nameserver)
for i in "${servers[@]}"
do
  if [[ $client =~ $i ]]
  then 
    using_unbound="true"
    break
  else
    using_unbound="false"
  fi
done
echo $using_unbound "|" $client

#!/bin/bash declare -a servers=("127.0.0.53" "127.0.0.52" "127.0.0.51") client=$(cat /etc/resolv.conf | grep nameserver) for i in "${servers[@]}" do if [[ $client =~ $i ]] then using_unbound="true" break else using_unbound="false" fi done echo $using_unbound "|" $client