切换Ubuntu20TLS源
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup
sudo vim /etc/apt/sources.list
1 deb http://mirrors.aliyun.com/ubuntu/ focal main restricted 2 deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted 3 deb http://mirrors.aliyun.com/ubuntu/ focal universe 4 deb http://mirrors.aliyun.com/ubuntu/ focal-updates universe 5 deb http://mirrors.aliyun.com/ubuntu/ focal multiverse 6 deb http://mirrors.aliyun.com/ubuntu/ focal-updates multiverse 7 deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse 8 deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted 9 deb http://mirrors.aliyun.com/ubuntu/ focal-security universe 10 deb http://mirrors.aliyun.com/ubuntu/ focal-security multiverse
sudo apt-get update
sudo apt-get upgrade
安装软件
sudo apt-get install net-tools
sudo apt-get install ssh
sudo apt-get install build-essential
安装golang-go ： https://github.com/golang/go/wiki/Ubuntu