mkdir -p $HOME/golang && curl https://dl.google.com/go/go1.12.12.linux-amd64.tar.gz | tar -C $HOME/golang -xz
export PATH=$HOME/golang/go/bin:$PATH
go version
export GOPATH=$HOME/go
#设置 GOPROXY 环境变量，将 Go Module 的镜像库切换到阿里云以优化下载速度
export GOPROXY=https://mirrors.aliyun.com/goproxy/