Ubuntu更换成国内的源

1.登录root用户

su 

 

2.先备份原来的源列表文件

mv /etc/apt/sources.list /etc/apt/sourses.list.backup

 

3.新建源列表文件

vim /etc/apt/sources.list

 

4.加入源的地址（推荐用阿里云源）
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

5.更新软件列表

apt update

 

6.更新软件（把已安装的软件与刚刷新的软件列表中的版本进行对比，如果发现已安装的软件版本太低，就会提示更新）

apt upgrade