Ubuntu repository

Ecco il contenuto del mio file /etc/apt/sources.list in Ubuntu Feisty 7.04

deb http://it.archive.ubuntu.com/ubuntu/ feisty main restricted
deb-src http://it.archive.ubuntu.com/ubuntu/ feisty main restricted
deb http://it.archive.ubuntu.com/ubuntu/ feisty-updates main restricted
deb-src http://it.archive.ubuntu.com/ubuntu/ feisty-updates main restricted
deb http://it.archive.ubuntu.com/ubuntu/ feisty universe
deb-src http://it.archive.ubuntu.com/ubuntu/ feisty universe
deb http://it.archive.ubuntu.com/ubuntu/ feisty multiverse
deb-src http://it.archive.ubuntu.com/ubuntu/ feisty multiverse
deb http://it.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse
deb-src http://it.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu feisty-security main restricted
deb-src http://security.ubuntu.com/ubuntu feisty-security main restricted
deb http://security.ubuntu.com/ubuntu feisty-security universe
deb-src http://security.ubuntu.com/ubuntu feisty-security universe
deb http://security.ubuntu.com/ubuntu feisty-security multiverse
deb-src http://security.ubuntu.com/ubuntu feisty-security multiverse
deb http://medibuntu.sos-sts.com/repo/ feisty free non-free
deb-src http://medibuntu.sos-sts.com/repo/ feisty free non-free
deb http://archive.canonical.com/ubuntu feisty-commercial main