Find hostname information and format for change

main.go

package main

import (
	"fmt"
	"io/ioutil"
	"os"
	"strings"
)

func main() {
	//	Get the hostname
	name, err := os.Hostname()
	if err != nil {
		panic(err)
	}

	//	Display the current hostname:
	fmt.Printf("Current hostname: %v\n", name)

	//	Get hostname file information:
	hostname, err := ioutil.ReadFile("/etc/hostname")
	if err != nil {
		panic(err)
	}

	//	Replace the contents with the new hostname:
	newhostname := strings.Replace(string(hostname[:]), "cerdo", "appliancemonitor-28e84f", -1)
	fmt.Printf("New hostname information: \n%v\n\n", newhostname)

	//	Get hosts file information:
	hosts, err := ioutil.ReadFile("/etc/hosts")
	if err != nil {
		panic(err)
	}

	//	Replace the contents with the new hostname:
	newhosts := strings.Replace(string(hosts[:]), "cerdo", "appliancemonitor-28e84f", -1)
	fmt.Printf("New hosts information: \n%v\n\n", newhosts)
}