Gopher into the pit one, go language installation and the first program

This is a creation in Article, where the information may have evolved or changed.

1. Download

Download Address: https://golang.org/dl/, support LINUX,WINDOWS,MAC,FREEBSD operating system and 32-bit (386) and 64-bit (AMD64) X86 processor architectures. Select your system environment corresponding to the download is OK. (The following is described in the Ubuntu 16.4 32-bit system environment).

Tips: Be sure to download the corresponding version, or there will be a problem, I started to download is the 64-bit version, under 32-bit operation has been error, as follows:

root@ubuntu:/usr/local/go/src# go run index.go bash: /usr/local/go/bin/go: cannot execute binary file: 可执行文件格式错误

2. Installation

Download the corresponding installation package, then execute the following code to extract the files to /usr/local the Go official recommendation directory.

tar -C /usr/local -xzf go1.8.3.linux-386.tar.gz

Replace the previous part of the above code with your own installation package file name, so your program directory is /usr/local/go , enter the directory, LS, can see a lot of folders and files:

• API folder . Used to store variables, constants, functions, and so on in each version of Go.
• Bin folder . Used to store the main standard command files, including go, Godoc, etc.
• Blog Folder . Articles for storing official blogs.
• Doc folder . For hosting a local official website, we can run it by name and godoc -http=:8222 then enter 127.0.0.1:8222 in the browser to view it.
• Lib folder . A library file for storing features.
• Misc Folder . Instructions and tools for storing some of the auxiliary classes.
• pkg folder . Used to store all archive files after installing the Go standard library.
• src folder . Used to store all the source files.
• Test Folder . For storing tests and verifying the files associated with the go itself.

Next, we need to set an environment variable for go. To /usr/local/go/bin add to the PATH environment variable, you need to add this line to your /etc/profile (System-wide permanent installation).

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

3, the first go version of the Hello World program.

Enter the/USR/LOCAL/GO/SRC directory, create a file named Index.go, and enter the following code:

package mainimport "fmt"func main() {    fmt.Printf("hello, world\n")}

Run it through go.

root@ubuntu:/mnt/hgfs/www/golang# go run hello.go hello, world

If the output of the success, then, congratulations.