apt/doc/examples/sources.list

# See sources.list(5) for more information, especialy
# Remember that you can only use http, ftp or file URIs
# CD-ROMs are managed through the apt-cdrom tool.
deb http://http.us.debian.org/debian stable main contrib non-free
deb http://security.debian.org stable/updates main contrib non-free

# Uncomment if you want the apt-get source function to work
#deb-src http://http.us.debian.org/debian stable main contrib non-free
#deb-src http://security.debian.org stable/updates main contrib non-free