wget https://storage.googleapis.com/golang/go1.5.linux-amd64.tar.gz
sudo tar -C /usr/local -xzf go1.5.linux-amd64.tar.gz

vi ~/.profile

export PATH=$PATH:/usr/local/go/bin
export GOPATH=$HOME/goprojects
export GOROOT=/usr/local/go
export PATH=$PATH:$GOROOT/bin:$GOPATH/bin

go 安装方法