deb http://mirrors.cloud.tencent.com/ubuntu/ bionic main restricted universe multiverse # deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic main restricted universe multiverse deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-updates main restricted universe multiverse # deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-updates main restricted universe multiverse deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-backports main restricted universe multiverse # deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-backports main restricted universe multiverse deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-security main restricted universe multiverse # deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-security main restricted universe multiverse # deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-proposed main restricted universe multiverse # deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-proposed main restricted universe multiverse