I would like to learn the basics of server management. I have been told that there are tools to automate creation and activation of subdomains. Do you know any? Guess they will be cgi, any php scripts out there too?
If you are referring to web domains in a LAMP environment, I have found VirtualMin to be very helpful for this. They have both a paid and a free version.
There is a similar product called cpanel that you might want to look into as well.