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To: Andrew <mohebbi@gmail.com>
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From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
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Subject: Re: Basic grep isn't working for me
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Andrew <mohebbi@gmail.com> writes:

> This command has always worked before, but we recently moved to a new
> server and now it isn't.
> 
> ---
> 
> su-2.05b# /usr/local/bin/keychain | grep -c existing
> 
> KeyChain 2.5.1; http://www.gentoo.org/proj/en/keychain/
> Copyright 2002-2004 Gentoo Foundation; Distributed under the GPL
> 
> * Found existing ssh-agent (84261)
> 
> 0
> 
> ---
> 
> Any help would be much appreciated.

It is printing its output on standard error, not standard output.

In sh, you could do this by redirecting standard error onto standard
output:
 $ keychain 2>&1 |grep exist
 * Found existing ssh-agent (46206)
 $ 

but you can't do that in csh-type shells.