deb-src http://security.debian.org/ squeeze/updates main contrib
# backports:
- deb http://backports.debian.org/debian-backports squeeze-backports main
- deb-src http://backports.debian.org/debian-backports squeeze-backports main
+ deb http://backports.debian.org/debian-backports squeeze-backports main contrib non-free
+ deb-src http://backports.debian.org/debian-backports squeeze-backports main contrib non-free
# official debian repository:
# deb http://ftp.debian.org/debian/ squeeze main contrib non-free