官网:https://golang.google.cn/dl/

wget https://golang.google.cn/dl/go1.15.linux-amd64.tar.gz
tar zxvf go1.15.linux-amd64.tar.gz
mv go /usr/local/
vi /etc/profile

//在文件底部增加：
export GOROOT=/usr/local/go
export PATH=$PATH:$GOROOT/bin

source /etc/profile

go version