sources.list

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