Update root.hints file for bind9

update_root_hints.sh

#!/bin/bash

# Vars
HEREAMI="$(dirname "$(readlink -f "${0}")")"
URL="https://www.internic.net/domain/named.root"
FILE="/usr/share/dns/root.hints"

# Check if file is the same, otherwise override
if ! diff -q <(curl -s "${URL}") "${FILE}" > /dev/null 2>&1; then
  # Download root.hints file
  curl -s ${URL} -o ${FILE}

  # Set last updated in file
  echo "Last updated: $(date +%d.%m.%Y) at $(date +%H:%M:%S)" > ${HEREAMI}/last_updated_root_hints_file.txt
fi

# Restart bind9/named
/usr/bin/systemctl restart named

# Exit script
exit 0