fernando@fernando:~/Desktop$ cat /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu/ feisty main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ feisty main restricted universe multiverse

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

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

deb http://archive.ubuntu.com/ubuntu/ feisty-proposed restricted main multiverse universe
deb-src http://archive.ubuntu.com/ubuntu/ feisty-proposed restricted main multiverse universe