Below are some repository
Ubuntu Main Repos
deb http://us.archive.ubuntu.com/ubuntu/ trusty main
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty main
Ubuntu Update Repos
deb http://us.archive.ubuntu.com/ubuntu/ trusty-security main
deb http://us.archive.ubuntu.com/ubuntu/ trusty-proposed main
deb http://us.archive.ubuntu.com/ubuntu/ trusty-backports main
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-security main
and i need to do all above repo's in one repo like deb http:/github.com/abclinux/ abclinux main
so if i going to update my system only one repo exist in my etc/apt/sources.list
deb http:/github.com/abclinux/ abclinux main
and during update use all above repository HOW?