Server build golang environment (ubuntu)

Environment download

https://golang.google.cn/dl/, select the appropriate environment package and download it to the /usr/local directory
and decompress it

tar -C /usr/local -xzf go$VERSION.$OS-$ARCH.tar.gz

Configure environment variables

1. GOROOT is the installation directory of go

export GOROOT="/usr/local/go"

zversion.go: no such file or directory

使用了go1.6等低版本编译，安装新的go版本即可。

export GOROOT=/usr/lib/go

 对于Ubuntu系统，默认使用Home/go目录作为gopath。 
 但是这里在编译过程中报错---go: open /usr/local/go/src/runtime/internal/sys/zversion.go: no such file or directory
 经过百度之后发现，需要设置 /usr/lib/go 作为gopah，原因尚不清楚

该目录下有3个子目录：src，pkg，bin

2. GOPATH , the location where the Go project code is stored. This is our own defined directory

export GOPATH=$HOME/go

3. Gobin

export GOBIN=$GOROOT/bin

4. Add GOBIN to GOPATH

export PATH=$PATH:$GOBIN

Let the configuration file take effect immediately

source $HOME/.profile

test installation

go version
go env

go project engineering

The gopath directory is where we store the source code we write. There are often 3 subdirectories under this directory: src, bin, pkg.

src —— Each subdirectory inside is a package. Inside the package is the source code file of Go

pkg —- generated after compilation, the target file of the package

bin —- Generated executable file.

first program

1. Create a new src in the gopath directory, and create a new test file hello.go

package main

import "fmt"

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

2. compile

$ go build hello.go

3. run

$ ./hello
hello, world

uninstall

要从系统中删除现有的Go安装，请删除go目录。 在Linux，macOS和FreeBSD下通常为/ usr / local / go

还应该从PATH环境变量中删除Go bin目录。 在Linux和FreeBSD下，您应该编辑/ etc / profile或$ HOME / .profile。