###### Ubuntu Main Repos deb mirror://mirrors.ubuntu.com/mirrors.txt bionic main restricted universe multiverse deb-src mirror://mirrors.ubuntu.com/mirrors.txt bionic main restricted universe multiverse
###### Ubuntu Update Repos deb mirror://mirrors.ubuntu.com/mirrors.txt bionic-security main restricted universe multiverse deb mirror://mirrors.ubuntu.com/mirrors.txt bionic-updates main restricted universe multiverse deb mirror://mirrors.ubuntu.com/mirrors.txt bionic-backports main restricted universe multiverse deb-src mirror://mirrors.ubuntu.com/mirrors.txt bionic-security main restricted universe multiverse deb-src mirror://mirrors.ubuntu.com/mirrors.txt bionic-updates main restricted universe multiverse deb-src mirror://mirrors.ubuntu.com/mirrors.txt bionic-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse