deb http://mirrors.163.com/ubuntu/ bionic main restricted
deb http://mirrors.163.com/ubuntu/ bionic-updates main restricted
deb http://mirrors.163.com/ubuntu/ bionic universe
deb http://mirrors.163.com/ubuntu/ bionic-updates universe
deb http://mirrors.163.com/ubuntu/ bionic multiverse
deb http://mirrors.163.com/ubuntu/ bionic-updates multiverse
deb http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-security main restricted
deb http://mirrors.163.com/ubuntu/ bionic-security universe
deb http://mirrors.163.com/ubuntu/ bionic-security multiverse
