As you can see I'm trying to get email addresses from the mail.log.
This is a part of a bash shell script I found but I#m wondering how I can check the
variable $1?
When I try
either from the command line or from a script it doesn't print nothing
Can someone explain me that please?
Thanks
Last edited by Franklin52; 05-04-2012 at 06:36 AM..
Reason: Please use code tags
It just picks up a field from the lines matching the regex in the egrep command.
What I'm wondering about is what's the meaning of the $1 variable in the egrep command.
Normally in the regexp (Perl) I use this:
if I want to store the contents inside <> and access it then by $1.
Maybe that that confuses me a bit
Even if (in my opinion) it's not that important in this case, I'm using a RHEL 5.8
Last edited by Franklin52; 05-04-2012 at 09:46 AM..
Reason: Code tags
Ah, now I see what you are trying to do. No grep does not work that way... The $1 is a shell (positional) parameter and it has nothing to do with grep....
It is possible to use back references in egrep, but only to aid in matching, for example:
Last edited by Scrutinizer; 05-04-2012 at 10:01 AM..
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