# env

``` bash
deb http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial main
deb-src http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial main
deb http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial-updates main
deb-src http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial-updates main

deb http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial universe
deb-src http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial universe
deb http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial-updates universe
deb-src http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial-updates universe
deb http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial-security main
deb-src http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial-security main
deb http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial-security universe
deb-src http://mirrors.cloud.aliyuncs.com/ubuntu/ xenial-security universe

```