ubuntu 1804 阿里源

Ubuntu 18.04是一种流行的Linux操作系统，而阿里源是指阿里云提供的软件源，可以加速软件包的下载和更新。以下是在Ubuntu 18.04中使用阿里源的步骤：

1.备份原有的软件源列表文件

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

2.编辑软件源列表文件

sudo vim /etc/apt/sources.list

3.将以下内容添加到文件中

# 阿里云Ubuntu镜像源
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

## Not recommended
# deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
# deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

4.更新软件源列表

sudo apt-get update

5.使用阿里源安装软件包

sudo apt-get install <package-name>