deb http://packages.linuxmint.com/ katya main upstream import backport
deb http://archive.ubuntu.com/ubuntu/ natty main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ natty-updates main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ natty-security main restricted universe multiverse
deb http://archive.canonical.com/ubuntu/ natty partner
deb http://extras.ubuntu.com/ubuntu natty main
deb http://packages.medibuntu.org/ natty free non-free

deb http://archive.getdeb.net/ubuntu natty-getdeb apps
deb http://archive.getdeb.net/ubuntu natty-getdeb games