[ubuntu] Questions about installing Ubuntu on a server

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http://ubuntuforums.org – Hi there I seen on the Ubuntu website that there is a server edition. This is good because I wan to install Ubuntu on a server: specifically this server, "Dell 2950 Twin Quad Core 2.66Ghz 16GB RAM SATA/SAS RAID PowerEdge Server VMware". However I have three questions that I could not find the answers to. ----- 1: can I install Ubuntu on to my server, create user accounts and then have my client machines connect to the server so the users can login without needing Ubuntu installed on each individual machine. This is basically what the idea of a server is, but all t (Hardware)