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

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

#!/bin/bash
while read i; do 
    echo -n "$i is "; 
    ( whois $i  | grep -F "$(echo -e 'No match\nNOT FOUND\nAVAIL')" -q && echo 'AVAILABLE! :D' || echo 'taken :('); 
done

#!/bin/bash
while read i; do 
    echo -n "$i.com is "; 
    ( whois $i.com  | grep 'No match' > /dev/null && echo 'AVAILABLE! :D' || echo 'taken :('); 
done

Takes input from stdin, so you can keep typing in domains to see if they're available. Requires `whois` to be installed. 

Just paste it into your terminal, and start typing in domains (e.g. `google.com` and hit enter) and it will tell you if the domain is available or not.

Tested with .com, .net, .org, .ca, you're welcome to write a more robust version!

# Example

    $ while read i; do echo -n "$i is ";  ( whois $i  | grep -F "$(echo -e 'No match\nNOT FOUND\n  AVAIL')" -q && echo 'AVAILABLE! :D' || echo 'taken :('); 
    ohhai.net
    ohhai.net is taken :(
    omgbbqponies.com
    omgbbqponies.com is AVAILABLE! :D

Shell script for domain searching binges

Bash