1.获取版本codename
sudo lsb_release -a
2.确认阿里源支持
传送门地址
注：该网页提供了阿里云支持的ubuntu系统下各个Codename版本
3.备份系统源文件
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
4.将阿里云源提供的源里的bionic替换成自己版本的codename,下面提供脚本,复制运行即可
Codename=$( (lsb_release -a)|awk '{print $2}'|tail -n 1 )
echo "
deb http://mirrors.aliyun.com/ubuntu/ $Codename main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ $Codename-backports main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ $Codename-proposed main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ $Codename-security main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ $Codename-updates main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename-backports main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename-proposed main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename-security main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename-updates main multiverse restricted universe " >sources.list
5.更新源索引
sudo apt-get update
6.更新软件升级
sudo apt-get upgrade