Can I access the host server with a graphical user interface where I can create some VM's, and if so what command line do I enter to go from a dos command to a UI?
that's the difference between server and client. A Server is a OS based system that can run services and manage programs, and usually on a server you don't have much client or end user based interaction, since most servers are headless (no monitor, no keyboard, no mouse, no real local screen). They just boot and await instructions or run pre-designed programs. That's what ESX is, it's a simple, yet powerful server that's meant to do one thing, run VM's. So your interaction with the server is mostly remote, not at the console, hence no pretty graphical user screen, this isn't something you use on a server anyway.Servers are big machines that need special cooling and sit in a large room (a NOC) and are closed off from the world, to minimize access, and they are very dependable, and don't sit near where you are to manage them.
A client is the piece where your have custom screens and interaction with the server at the back end, SQL has a management console, Windows has Remote Desktop, Linux has VNC or Putty, all of these things are designed to let you interact with the server, but depending on how you setup security, you have to login or have limited access to certain functions, so you don't want people doing things at the console, like creating VM's. That's reserved for the client programs.
So you can't do anything at the ESX console concerning VM's (you can do more advanced features like power on, create snapshots, etc.. ) but normally these actions would be done from the client screen, not the server.
