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I'm making a batch file that tests a Computer name and sees if it responds.

However when I run it, even with the "@echo off", I still see the reply being sent and so on. How can I hide that?

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redirect the output to nul:

ping -n 1 %computer_name%  | find "Reply" > nul

this will still correctly set the %errorlevel% if the string was or was not found, but also hide the output.

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And, in most cases, just to be sure, stick a 2>&1 at the end as well. Many programs (ping and find apparently not) emit error messages to stderr. – Joey Oct 21 '09 at 6:26
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@Johannes Rössel: No. This is DOS, not Unix. – Teddy Oct 21 '09 at 9:11
Surely it's "nul:", not "nul"? – Teddy Oct 21 '09 at 9:12
I think people use nul: because files cannot be created with a colon in their name on Windows, so it will revert to nul by itself. Even an example from Microsoft on how to invoke DOS commands uses nul by itself: support.microsoft.com/kb/40592 – John T Oct 21 '09 at 11:48
Thank You sir! Great Success (*With borat accent) – thegreyspot Oct 22 '09 at 2:17

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