ubuntu without GUI in virtual box

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http://askubuntu.com – I have a win XP laptop, in which i run virtual box with the latest UBUNTU, my hardware is little old, so running the latest version of UBUNTU inside Virtual box is kind of a hassle, very slow performances, even if all i'm doing is running the terminal and practicing Linux commands ! i tried DSL (Damn Small Linux) with my virtual box, very small distro (50 MB), i am satisfied with how faster is my system now, but i miss UBUNTU, moreover, DSL is missing too many commands, such as sed an many others that i can't remember. is it possible to run UBUNTU just in console mode, no GUI or minimum GUI. (HowTos)