There is something about the official Go installation instructions that keep confusing developers, myself included - so here is a quick tutorial on how I setup Go on my new MSI laptop running the latest Ubuntu 20.
1/4 Download Go
Visit Go web and check the latest version: 1.14.2
Fetch the Go source to /usr/local/ dir:
sudo wget -c https://dl.google.com/go/go1.14.2.linux-amd64.tar.gz -O - | sudo tar -xz -C /usr/local
2/4 Configure the ENV
I like to keep all my Go projects in $HOME/go.
Depending on your setup, add the following 2 env variables to your shell configs and define the desired paths.
Check your shell:
echo $SHELL
/usr/bin/zsh
Because I use ZSH, I will add the 2 vars to the $HOME/.zshrc config file:
export GOPATH=$HOME/go
export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin
Reload the config:
source $HOME/.zshrc
3/4 Validate the installation
go version
go version go1.14.2 linux/amd64
echo $GOPATH
/home/web3coach/go
echo $PATH
usr/local/go/bin:/home/web3coach/go/bin
Perfect. Let's write a simple Go program to ensure everything works well.
4/4 Program Hello
Create the Hello's project dir:
mkdir -p $HOME/go/src/hello
cd $HOME/go/src/hello
touch hello.go
Paste the following Hello's code into the ./hello.go file:
package main
import "fmt"
func main() {
fmt.Println("Hello, World!")
}
Compile
go install
A new program's binary will be generated and stored in $GOPATH/bin dir:
ls -la $GOPATH/bin
drwxrwxr-x 2 web3coach web3coach 4096 čec 5 19:25 .
drwxrwxr-x 4 web3coach web3coach 4096 čec 5 19:25 ..
-rwxrwxr-x 1 web3coach web3coach 2076690 čec 5 19:25 hello
hello is your new generated program's binary. You can now execute it from any directory because the $GOPATH/bin is included in your previously configured $PATH.
hello
Output: "Hello, World!"
Summary
You installed Go 1.14.2 and fully setup its environment. If you want to know how to develop a blockchain from scratch in Go - follow me on Twitter: https://twitter.com/Web3Coach
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