The following lines should be places at at the top of sources.list:
deb mirror://mirrors.ubuntu.com/mirrors.txt trusty main restricted universe multiverse
deb mirror://mirrors.ubuntu.com/mirrors.txt trusty-updates main restricted universe multiverse
deb mirror://mirrors.ubuntu.com/mirrors.txt trusty-backports main restricted universe multiverse
deb mirror://mirrors.ubuntu.com/mirrors.txt trusty-security main restricted universe multiverse
The following lines should be places at at the top of sources.list:
deb mirror://mirrors.ubuntu.com/mirrors.txt trusty main restricted universe multiverse deb mirror://mirrors.ubuntu.com/mirrors.txt trusty-updates main restricted universe multiverse deb mirror://mirrors.ubuntu.com/mirrors.txt trusty-backports main restricted universe multiverse deb mirror://mirrors.ubuntu.com/mirrors.txt trusty-security main restricted universe multiverse