This script checks for the availability of a domain name.

dn-check.sh

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

DOMAINS=( '.com' '.org' '.fr')
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 
            tput setaf 2; 
	        echo  "$1${DOMAINS[${i}]} : available"
        else
            tput setaf 1; 
	        echo  "$1${DOMAINS[${i}]} : not available"
	    fi 
        tput setaf 0;
    done 
shift 
done