[quote user="djhd"]my domain is http://www.harryduran.com
, and am trying to figure out if I'm running plain Linux. If so, can I install Zimbra. I know some basic SSH using Putty, and I've worked with files that way before, but when I unzipped the .tgz file, there was no 'zcs' directory created. It created ZimbraBuilder, and some others.[/QUOTE]
Okay, it looks like you are using a web hosting company, phpwebhosting.com. The way Zimbra works, you actually really would want to have root on your server, as Zimbra needs to run a mail, pop, and imap server, as well as setting up iptables.
What you could do is email the admins, and ask them to set it up for everyone.
They would be sure to know what Linux distribution they are running. There isn't actually a plain Linux, any Linux installation is associated with a distribution like RedHat, Fedora, Debian, Gentoo, and the like. So, they should be able to determine if it'll work on their systems. Further, there are some unofficial guides for making it work on non-standard distributions, such as Debian.
[quote user="djhd"]What's that web site that tells you what server a website is running?[/QUOTE]
You're thinking of netcraft.com. I looked, as sometimes it is able to determine what distribution is being run... unfortunatly in this case, it does not. So, you might just have to bug your admins about all this :-)