RH question

[pll at lanminds.com]

Hi,

I was just showing someone the use of xargs in conjunction with find.
I thought I'd show him how to find which files in the /etc tree 
contain the system's hostname.  So, I did:

	find /etc -type f | xargs grep qatest52

(qatest52 being the system's name).

I was pretty confident of the results, but was surprised by one 
additional line which I've never seen before:

    /etc/sysconfig/rhn/systemid:<value><string>qatest52</string></value>

This appears to be an XML formatted file.  It's on an RH9 system.
Of course, before I could go looking around the system more, the guy 
went back into the lab and rebooted the system which killed my ssh 
session.  And my curiousity is killing me!

So, what's this file for, and what else does it contain?
What's the /etc/sysconfig/rhn subdir for, and what's in there (other 
than the systemid file :)

Thanks,
-- 

Seeya,
Paul
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