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'nc localhost 80' FTFY



    exec 5<>"/dev/tcp/localhost/80"
    echo -ne "GET / HTTP/1.1\r\nHost: localhost\r\n\r\n" > &5
    cat < &5
FTFY

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Clever, though nc really is better than telnet. It is much easier to pipe into just for starters.

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/dev/tcp is a bashism. It's not a real (kernel-provided) device.

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Actually, you broke it. telnet sends CRLF line breaks like you're supposed to. nc will just send LF. A strict web server won't talk to you.

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