Ubuntu 修改语言报错Failed to download repository information

1.进入文件(ps:vim可能出现无法修改sources.list文件的问题）

sudo gedit /etc/apt/sources.list

2.修改(我是直接增添以下内容在其原始源前面，没有删原始内容)文件并保存，这里会替换原文件

deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse

3、更新镜像源

sudo apt update
sudo apt upgrade

4.修改语言参考https://blog.csdn.net/plus1993/article/details/48102043
5。系统崩溃，进不去了。。。。删除，换kali了，https://blog.csdn.net/Bulldozer_GD/article/details/106198746。