linux系统安装go环境

centos 安装 go 环境

环境与软件包名称

1. 系统环境： centos7.5
2. go软件包: go1.17.6.linux-amd64.tar

1. 上传软件包到系统

[root@manager~]#pwd
/root
[root@manager~]#
[root@manager~]#ls
anaconda-ks.cfg  go  go1.17.6.linux-amd64.tar.gz  redis-6.2.6.tar.gz

2. 解压软件包到/usr/local/

[root@manager~]#tar xf go1.17.6.linux-amd64.tar.gz -C /usr/local/

3. 添加环境变量

[root@manager~]#tail -1 /etc/profile
export PATH=//usr/local/go/bin/:$PATH
[root@manager~]#source /etc/profile

4. 执行go version 查看是否安装成功

[root@manager~]#go version
go version go1.17.6 linux/amd64

5. 执行 go env 查看go环境变量

[root@manager~]#go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/root/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/root/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.17.6"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/dev/null"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build3492336170=/tmp/go-build -gno-record-gcc-switches"

6. 筛选出GOROOT 及 GOPATH

[root@manager~]#go env |egrep -i "path|root"
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOMODCACHE="/root/go/pkg/mod"
GOPATH="/root/go"
GOROOT="/usr/local/go"

6. 创建GOPATH所需目录

[root@manager~]#tree /root/go/
/root/go/
├── bin
├── pkg
│   └── mod
└── src
    └── main
        └── main.go

5 directories, 1 file
[root@manager~]#

7. 测试go 代码是否可以执行

[root@manager~]#cd /root/go/src/main/
[root@manager~/go/src/main]#ls
main.go
[root@manager~/go/src/main]#
[root@manager~/go/src/main]#cat main.go 
package main

import (
    "fmt"
    "reflect"
)
func main () {
    var names = [...]string{"qiaoning","wangtao","lixianglong"}
    var sp = names[:2]
    fmt.Println(names,reflect.TypeOf(names))
    fmt.Println(sp)
    fmt.Println("hello golang")
}
/*
[qiaoning wangtao lixianglong] [3]string
hello golang
 */

[root@manager~/go/src/main]#go run main.go 
[qiaoning wangtao lixianglong] [3]string
[qiaoning wangtao]
hello golang

8. 学会的第一个go程序

package main

import "fmt"

func qiao(){

    var username,password string
    fmt.Println("请输入用户名")
    fmt.Scanln(&username)
    fmt.Println("username",username)

    fmt.Println("请输入密码")
    fmt.Scanln(&password)
    fmt.Println("password",password)

    if username == "qiao" && password == "123"{
        fmt.Println("登录系统成功")
    }else{
        fmt.Println("登录系统失败")
    }

}

func main() {
        qiao()
}

9.python写法

users = str(input('请输入用户名称:'))
print('users',users)
password = int(input('请输入用户密码:'))
print('password',password)

if users == 'qiao' and password == 123:
    print('登录成功')
else:
    print('登录失败')