deb mirror://mirrors.ubuntu.com/mirrors.txt trusty main universe
deb mirror://mirrors.ubuntu.com/mirrors.txt trusty-updates main universe
deb mirror://mirrors.ubuntu.com/mirrors.txt trusty-security main universe
deb mirror://mirrors.ubuntu.com/mirrors.txt trusty-backports main universe
#deb http://archive.ubuntu.com/ubuntu trusty main universe
#deb http://archive.ubuntu.com/ubuntu trusty-updates main universe
#deb http://archive.ubuntu.com/ubuntu trusty-security main universe
#deb http://archive.ubuntu.com/ubuntu trusty-backports main universe