ubuntu-jaunty http://ar.archive.ubuntu.com/ubuntu/ ubuntu-jaunty-security http://security.ubuntu.com/ubuntu
Y luego, hay que cambiar /etc/apt/sources.list de manera que quede:
deb http://localhost:9999/ubuntu-jaunty jaunty main restricted deb http://localhost:9999/ubuntu-jaunty jaunty-updates main restricted deb http://localhost:9999/ubuntu-jaunty jaunty universe deb http://localhost:9999/ubuntu-jaunty jaunty-updates universe deb http://localhost:9999/ubuntu-jaunty jaunty multiverse deb http://localhost:9999/ubuntu-jaunty jaunty-updates multiverse deb http://localhost:9999/ubuntu-jaunty-security jaunty-security main restricted deb http://localhost:9999/ubuntu-jaunty-security jaunty-security universe deb http://localhost:9999/ubuntu-jaunty-security jaunty-security multiverse
Esta configuración es la que usé para un servidor Ubuntu 9.04
