下载安装包
wget https://dl.google.com/go/go1.12.7.linux-amd64.tar.gz
解压
tar -zxvf go1.12.7.linux-amd64.tar.gz
mv go /home/
mkdir /home/gopath -p
设置环境变量,最好添加到bashrc中
export GOROOT=/home/go/
export PATH=$PATH:/home/go/bin/
export GO111MODULE=on
export GOPATH=/home/gopath