> Here is my problem:
> I have two linux boxes, each with its own IP and hostname. Now I want
to
> combine these two into one linux box, but still keep the two sets of
IP
> addresses and hostnames. For example, when I go to the web page, both
> hostnames should lead me to the same linux box after the combination.
> I prefer to use one NIC to listen to two IP addresses like setting
eth0 and
> eth0:0 to different IP address. What I have to do is to add the
hostname in
> the hosts file, is that right?
>
Nope.

I think it would be easier to make a list of the duplicated services
you want to have on the new box (web, mail, samba, dns, etc.) and find
a way to do it for each one. For example, web and mail support virtual
hosting. The DNS can handle multiple zones by itself. You can also do
the dual-Samba trick i explained in my previous post, and so on.

If you want to have people logging in on ssh and see a new environment,
you can do it with chrooted sshd, only you need to mount /proc in the
chroot, which by my opinion is too insecure. (the hostname stays the
same, as is the same kernel)

If you want separate '/proc's and hostnames, go for the vserver kernel
patch, at http://www.13thfloor.at/vserver/project/ . But i urge you to
reconsider your problem, because I don't want a newbie on my conscience
(kernel patching is a dangerous sport for beginners)

--
Petre.