[CentOS] [OT] List of all email users

Jussi Hirvi greenspot at greenspot.fi
Thu Oct 30 14:46:20 UTC 2008

This is not CentOS-specific, hence OT.

I need a list of all email users on my system (there are hundreds of them).
The list could be extracted from /etc/aliases and the virtusertable.

Does anyone know of a script that would do this automatically? It would have
- exclude commented-out lines (of course)
- exclude duplicates
- produce a list of usernames (or maybe unresolved email addresses for some
users) separated by a comma

I imagine perl would be the way to go. I haven't used perl at all myself.


Jussi Hirvi * Green Spot
Topeliuksenkatu 15 C * 00250 Helsinki * Finland
Tel. & fax +358 9 493 981 * Mobile +358 40 771 2098 (only sms)
jussi.hirvi at greenspot.fi * http://www.greenspot.fi

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