How about:

my $cmd='grep string file';
unless (defined $cmd) {
 die "string not found";
}

>---- Original Message ---
>From: Jorge Goncalvez <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Cc: 
>Subject: Re:seek a string
>
>Hi, I would like to open a file and know if a string exists.
>How can I do this?
>Thanks
>
>
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