备份源
sudo cp /etc/apt/sources.list.d/ubuntu.sources /etc/apt/sources.list.d/ubuntu.sources.bak
设置新源-阿里云
sudo sed -i 's|http://archive.ubuntu.com/ubuntu/\|http://mirrors.aliyun.com/ubuntu/\|g' /etc/apt/sources.list.d/ubuntu.sources
sudo sed -i 's|http://security.ubuntu.com/ubuntu/\|http://mirrors.aliyun.com/ubuntu/\|g' /etc/apt/sources.list.d/ubuntu.sources
更新
sudo apt update && sudo apt upgrade -y