availability.sh

if [ "$#" == "0" ]; then
  echo "You need to supply at least one argument!"
  exit 1
fi

DOMAINS=('.com' '.co.uk' '.net' '.info' '.mobi'
  '.org' '.tel' '.biz' '.tv' '.cc' '.eu' '.ru'
  '.in' '.it' '.sk' '.com.au' '.tech' '.io' '.systems' '.xxx')

ELEMENTS=${#DOMAINS[@]}

while (("$#")); do
  for ((i = 0; i < $ELEMENTS; i++)); do
    whois $1${DOMAINS[${i}]} | egrep -q \
      '^No match|^NOT FOUND|^Not fo|AVAILABLE|^No Data Fou|has not been regi|No entri'
    if [ $? -eq 0 ]; then
      echo "$1${DOMAINS[${i}]} : available"
    fi
  done

  shift
done