Ubuntu更换阿里源

查看ubuntu的Codename

lsb_release -a | grep Codename | awk '{print $2}' # 输出结果为下文中的Codename
# 输出的结果：
No LSB modules are available.
focal

备份系统源

cd /etc/apt
sudo mv sources.list sources.list.bak

写入阿里云的源

sudo vim sources.list

下面源信息中Codename为第一步中系统的Codename，用记事本批量替换即可。

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