1.先備份：sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup
2.編輯元列表文件：sudo vim /etc/apt/sources.list
ps：如果找不到vim命令，請先安裝vim：sudo apt-get install vim
3.註釋掉sources.list中的所有內容，將下面內容粘貼進去：
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
4.更新軟件列表：sudo apt-get update
5.更新軟件包：sudo apt-get upgrade
上述內容可以快速應對相信阿里的各位新手同學，如果覺得有其他更好的方式，歡迎交流。