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From: "Barry Byrne" <barry.byrne@wbtsystems.com>
To: "'Olivier Nicole'" <on@cs.ait.ac.th>,
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References: <200708210720.l7L7KRpU091443@banyan.cs.ait.ac.th>
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Cc: 
Subject: RE: Get effective group id
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> Hi,
> 
> >From a Bourne shell script, how to get (and test) the group id of the
> user that is executing the script?
> 
> Best regards,

Olivier:

id -gn   should give you the group name. Drop the -n if you want just the
numberic id.

 - barry