linux installation environment and go write your first program a go

1, go download source package from the official website

wget   https://dl.google.com/go/go1.12.5.linux-amd64.tar.gz

 

2, in the / usr / local decompression Source Package

sudo tar -zxf go1.12.5.linux-amd64.tar.gz -C /usr/local

 

3, add / usr / local / go / bin directory to the PATH environment variable

export PATH=$PATH:/usr/local/go/bin

 

4, the test environment

Enter the go version can see the version number says that the installation was successful

 

5, to establish a working space

New go in the directory / home directory (file names at will), and then were three new directories under the directory go:

src ---- Inside each subdirectory is a package. Go inside the package is a source code file
generated after pkg ---- compiled package object file
bin ---- generated executable file.

 

6, GOPATH set environment variables
vi / etc / profile 
and add the following line:
Export GOPATH = / Home / Go
After saving, execute the following command, the environment variable to take effect immediately:
Source / etc / Profile

At this point go environment have all been installed, we go to write the first program

 

7, create a file in the src folder for hello, create a new file folder in the file hello.go

It reads as follows:

package main

import "fmt"

func main(){
	fmt.Printf("hello world!\n")
}　　

Compiled file folder in the file hello:

go install

Will see an executable file in the bin directory, enter

./hello

You can see

hello world！

Output