how to setup domain name permentaly?

["bbaa aaa" <mccrh hotmail com>]

We have Redhat AS 2.1 and 3.0 on DELL servers.  Due to some applications 
need domain name setup.  I put  following on /etc/hosts first line:

192.9.202.5          server1.aaa.com

after reboot, domain name still empty.


I can use "domainname  aaa.com" temporary setup domain name.

Does there has way permentally setup domain name?

Thanks.

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today it's FREE! 
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/