This is an easy script to find out if a domain is available. It works with generic tld.

 bash | 
 
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#!/bin/bash
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while read i; do 
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    echo -n "$i is "; 
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    whois $i  | grep -F "$(echo -e 'No matchnNOT FOUNDn  AVAIL')" -q && echo 'AVAILABLE!犀利士
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 :D' || echo 'taken :('; 
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done