Óla Bernardo Innocenti, visit this link, and see the project multilinux, or mount several terminals with a unique CPU, but here you use the Xephyr to get up. More so is not possible to do with the new version of UBUNTU 7.10. Then see the link of the project. http://www.ronaldcosta.pro.br/sistemas/wiki/index.php/Multiterminais_Ubuntu_7.04