# 如果要使用源代码,请自行去掉注释。 deb http://mirror.iscas.ac.cn/ubuntu/ xenial main restricted universe multiverse # deb-src http://mirror.iscas.ac.cn/ubuntu/ xenial main restricted deb http://mirror.iscas.ac.cn/ubuntu/ xenial-updates main restricted universe multiverse # deb-src https://mirror.iscas.ac.cn/ubuntu/ xenial-updates main restricted deb http://mirror.iscas.ac.cn/ubuntu/ xenial-backports main restricted universe multiverse # deb-src http://mirror.iscas.ac.cn/ubuntu/ xenial-backports main restricted universe multiverse deb http://mirror.iscas.ac.cn/ubuntu/ xenial-security main restricted universe multiverse # deb-src http://mirror.iscas.ac.cn/ubuntu/ xenial-security main restricted universe multiverse # 预发布软件源,不建议启用 # deb http://mirror.iscas.ac.cn/ubuntu/ xenial-proposed main restricted universe multiverse # deb-src http://mirror.iscas.ac.cn/ubuntu/ xenial-proposed main restricted universe multiverse