ubuntu20.04更换国内源的方法。

1.打开终端。

2.输入以下命令备份原来的源。

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

3.再输入以下命令打开sources.list配置文件更换源。

sudo?vim/etc/apt/sources.list
//配置内容如下
deb?http://mirrors.aliyun.com/ubuntu/?focal?main?restricted?universe?multiverse?
deb?http://mirrors.aliyun.com/ubuntu/?focal-security?main?restricted?universe?multiverse?
deb?http://mirrors.aliyun.com/ubuntu/?focal-updates?main?restricted?universe?multiverse?
deb?http://mirrors.aliyun.com/ubuntu/?focal-proposed?main?restricted?universe?multiverse?
deb?http://mirrors.aliyun.com/ubuntu/?focal-backports?main?restricted?universe?multiverse
?deb-src?http://mirrors.aliyun.com/ubuntu/?focal?main?restricted?universe?multiverse?
?deb-src?http://mirrors.aliyun.com/ubuntu/?focal-security?main?restricted?universe?multiverse?
?deb-src?http://mirrors.aliyun.com/ubuntu/?focal-updates?main?restricted?universe?multiverse?
?deb-src?http://mirrors.aliyun.com/ubuntu/?focal-proposed?main?restricted?universe?multiverse?
?deb-src?http://mirrors.aliyun.com/ubuntu/?focal-backports?main?restricted?universe?multiverse?focal

4.再输入命令更新源。

sudo?apt-get?update

5.最后输入命令更新一下软件即可。

sudo?apt-get?upgrade