/etc/apt/sources.list.example

$ cat /etc/apt/sources.list
#

# deb cdrom:[Debian GNU/Linux testing _Jessie_ - Official Snapshot amd64 DVD Binary-1 20150323-08:17]/ jessie contrib main

deb cdrom:[Debian GNU/Linux testing _Jessie_ - Official Snapshot amd64 DVD Binary-1 20150323-08:17]/ jessie contrib main

deb http://ftp.us.debian.org/debian/ jessie main contrib non-free
deb-src http://ftp.us.debian.org/debian/ jessie main

deb http://security.debian.org/ jessie/updates main contrib
deb-src http://security.debian.org/ jessie/updates main contrib

# jessie-updates, previously known as 'volatile'
deb http://ftp.us.debian.org/debian/ jessie-updates main contrib
deb-src http://ftp.us.debian.org/debian/ jessie-updates main contrib

# jessie-backports, previously on backports.debian.org
deb http://ftp.us.debian.org/debian/ jessie-backports main contrib
deb-src http://ftp.us.debian.org/debian/ jessie-backports main contrib