package main

import "fmt"

func main() {
  message := greetMe("world")
  fmt.Println(message)
}

func greetMe(name string) string {
  return "Hello, " + name + "!"
}

$ go run hello.go

var msg string
msg = "Hello"

msg := "Hello"

const Phi = 1.618

str := "Hello"

str := `Multiline
string`

num := 3          // int
num := 3.         // float64
num := 3 + 4i     // complex128
num := byte('a')  // byte (alias for uint8)

var u uint = 7        // uint (unsigned)
var p float32 = 22.7  // 32-bit float

// var numbers [5]int
numbers := [...]int{0, 0, 0, 0, 0}

i := 2
f := float64(i)
u := uint(i)

slice := []int{2, 3, 4}

slice := []byte("Hello")

if day == "sunday" || day == "saturday" {
  rest()
} else if day == "monday" && isTired() {
  groan()
} else {
  work()
}

if _, err := doThing(); err != nil {
  fmt.Println("Uh oh")

switch day {
  case "sunday":
    // cases don't "fall through" by default!
    fallthrough

  case "saturday":
    rest()

  default:
    work()
}

for count := 0; count <= 10; count++ {
  fmt.Println("My counter is at", count)
}

entry := []string{"Jack","John","Jones"}
for i, val := range entry {
  fmt.Printf("At position %d, the character %s is present\n", i, val)

n := 0
x := 42
for n != x {
  n := guess()
}

if day == "sunday" || day == "saturday" {
  rest()
} else if day == "monday" && isTired() {
  groan()
} else {
  work()
}

if _, err := doThing(); err != nil {
  fmt.Println("Uh oh")

NAME="John"
echo $NAME
echo "$NAME"
echo "${NAME}

if [[ -z "$string" ]]; then
  echo "String is empty"
elif [[ -n "$string" ]]; then
  echo "String is not empty"
fi

#!/bin/bash

  echo -e "\n update packages\n"
  sudo apt update -y && sudo apt upgrade -y
  sleep 5
  echo -e "\n update timezone\n"
  sudo timedatectl set-timezone Asia/Manila
  date
  sleep 3
  echo -e "\n install qemu agent\n"
  sudo apt install qemu-guest-agent -y
  sleep 2
  sudo systemctl enable qemu-guest-agent
  sleep 2
  sudo systemctl restart qemu-guest-agent
  sleep 2
  sudo systemctl status qemu-guest-agent
  echo -e "\n done\n"

#!/bin/bash

  echo -e "\n install docker dependencies\n"
  sudo apt install apt-transport-https ca-certificates curl software-properties-common -y 
  sleep 5
  echo -e "\n add GPG Key\n"
  sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
  sleep 5
  echo -e "\n add docker repository\n"
  sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
  sleep 5
  echo -e "\n install docker-ce\n"
  sudo apt install docker-ce -y
  sudo systemctl restart docker
  sudo systemctl enable docker
  sleep 3
  sudo systemctl status docker
  sleep 3
  echo -e "\n add user to docker group\n"
  sudo usermod -aG docker ${USER}
  sleep 3
  echo -e "\n done\n"

docker run -d \
   -p 8000:8000 \
   -p 9443:9443 \
   --name do-portainer \
   --restart=always \
   -v /var/run/docker.sock:/var/run/docker.sock \
   -v /opt/docker-data/portainer/data:/data \
   portainer/portainer-ce:latest

docker run -d \
  -p 9001:9001 \
  --name do-portainer-agent \
  --restart=always \
  -v /var/run/docker.sock:/var/run/docker.sock \
  -v /opt/docker-data/portainer-agent/volumes:/var/lib/docker/volumes \
  portainer/agent:2.19.5