This script can be used to check a list of domains against a desired outcome by utilizing the `dig` command. It provides information on whether each domain matches or mismatches the expected outcome.

domain_check.sh

#!/bin/bash

 print_help() {
     echo "Usage: ./domain_check.sh DESIRED_OUTCOME DOMAIN1 [DOMAIN2 ...]"
     echo "Check a list of domains against a desired outcome using the dig command."
     echo ""
     echo "Arguments:"
     echo "  DESIRED_OUTCOME   The expected outcome for the domains."
     echo "  DOMAIN1           The first domain to check."
     echo "  DOMAIN2 ...       Additional domains to check."
     echo ""
     echo "Example:"
     echo "  ./domain_check.sh SPECIFIC_OUTCOME example.com example.org example.net"
 }

 desired_outcome="$1"  # Desired outcome provided as the first command-line argument
 domain_list=("${@:2}")  # Domain list provided as command-line arguments starting from the second argument

 if [ "$1" == "--help" ] || [ "$1" == "-h" ]; then
     print_help
     exit 0
 fi

 if [ -z "$desired_outcome" ] || [ ${#domain_list[@]} -eq 0 ]; then
     echo "Error: Insufficient arguments."
     echo ""
     print_help
     exit 1
 fi

 echo "Checking domains against the desired outcome: $desired_outcome"
 echo ""

 for domain in "${domain_list[@]}"; do
     result=$(dig +short "$domain")

     if [[ "$result" != "$desired_outcome" ]]; then
         echo "Domain: $domain"
         echo "Expected Outcome: $desired_outcome"
         echo "Actual Outcome: $result"
         echo "Status: Mismatch"
         echo ""
     else
         echo "Domain: $domain"
         echo "Expected Outcome: $desired_outcome"
         echo "Actual Outcome: $result"
         echo "Status: Match"
         echo ""
     fi
 done