centos7安装go

epel源

epel源中有golang包提供安装：

sudo yum install -y epel-release

下载golang包

sudo yum install -y golang

设置环境变量

修改/etc/profile：

# GOROOT
export GOROOT=/usr/lib/golang
export PATH=$GOROOT/bin:$PATH

创建目录~/gopath，包含bin pkg src子目录，修改~/.bashrc

# GOPATH
export GOPATH=~/gopath
export PATH=$GOPATH/bin:$PATH