[ubuntu] Ubuntu server with Desktop GUI

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http://ubuntuforums.org – Hello out there. I am new to Ubuntu/Linux/Unix in general and want to use the GUI to start, BUT, need to use Ubuntu as a server platform for Asterisk ( An open source PBX) From what I read, the use of the GUI is discouraged with the server. Question #1. Does the GUI from the desktop version a functional means of controlling the server functions? Q2. If so, and if I intended to use the GUI that comes with the desktop version, Should I install the desktop version with the GUI and upgrade the additional packages for the server functions or the other way around or does it matter at all??? (Hardware)