安装环境：CentOS7.2 64位，安装Golang
查看go是否安装过：
$ go env
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/root/go"
GORACE=""
GOROOT="/usr/lib/golang"
GOTOOLDIR="/usr/lib/golang/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build892156781=/tmp/go-build -gno-record-gcc-switches"
CXX="g++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
查看yum的Golang
查看golang：
$ yum info golang
Loading mirror speeds from cached hostfile
Installed Packages
Name : golang
Arch : x86_64
Version : 1.8.3
Release : 1.el7
Size : 11 M
Repo : installed
From repo : os
Summary : The Go Programming Language
URL : http://golang.org/
License : BSD and Public Domain
Description : The Go Programming Language.
如果没有安装，执行安装命令：
yum install golang
这样安装之后通过命令行输入go就可以看到相关的信息。输入go env查看环境信息：
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/root/go"
GORACE=""
GOROOT="/usr/lib/golang"
GOTOOLDIR="/usr/lib/golang/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build681960794=/tmp/go-build -gno-record-gcc-switches"
CXX="g++"
CGO_ENABLED="1"
PKG_CONFIG="pkg-config"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
环境配置
1）查看是否存在.bash_profile, 如果不存在则新建.bash_profile文件
vi /etc/profile
2）添加环境变量 在文件后面追加如下文本：
# GOROOT
export GOROOT=/usr/lib/golang
# GOPATH
export GOPATH=/root/Work/programmer/go/gopath/
# GOPATH bin
export PATH=$PATH:$GOROOT/bin:$GOPATH/bin
需要立即生效，在终端执行如下命令：
source /etc/profile
再次查看：
$ go env
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/root/Work/programmer/go/gopath/"
GORACE=""
GOROOT="/usr/lib/golang"
GOTOOLDIR="/usr/lib/golang/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build963502980=/tmp/go-build -gno-record-gcc-switches"
CXX="g++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
至此，Go语言已经安装好了。
image.png
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