deb http://archive.ubuntu.com/ubuntu/ natty main restricted universe
deb-src http://archive.ubuntu.com/ubuntu/ natty main restricted universe

deb http://archive.ubuntu.com/ubuntu/ natty-updates main restricted universe
deb-src http://archive.ubuntu.com/ubuntu/ natty-updates main restricted universe

deb http://security.ubuntu.com/ubuntu natty-security main restricted universe
deb-src http://security.ubuntu.com/ubuntu natty-security main restricted universe