CentOS 5.1 Server Setup: LAMP, Email, DNS, FTP, ISPConfig (a.k.a. The Perfect Server)

[Derekman9]

I'm having trouble at the mysql section of the "CentOS 5.1 Server Setup: LAMP, Email, DNS, FTP, ISPConfig (a.k.a. The Perfect Server) - Page 4" tutorial. Let me know if this is a silly question but I'm wondering how I find out what to put in the server1.example.com part of this line:
mysqladmin -h server1.example.com -u root password yourrootsqlpassword
I know what I named the server but I don't know what domain it is part of. I'm trying to set this up as part of a school project and to host the portfolio I'm working on for class.
Thanks,
Derek