Vagrant : Install2019/07/25

	Install Vagrant that is wrapper tool for Virtualization software like VirtualBox or others. Vagrant supports many Virtualization software like VirtualBox or KVM and others, on this example, it is based on the VirtualBox installed environment.
[1]	Install Vagrant.

root@dlp:~#

apt -y install vagrant

[2]	Basic usage of Vagrant.

# download and add virtual machine images

# for downloadable image, refer to the official site below

# ⇒ https://app.vagrantup.com/boxes/search

root@dlp:~#

vagrant box add generic/debian10

==> box: Loading metadata for box 'generic/debian10'
    box: URL: https://vagrantcloud.com/generic/debian10
This box can work with multiple providers! The providers that it
can work with are listed below. Please review the list and choose
the provider you will be working with.

1) hyperv
2) libvirt
3) parallels
4) virtualbox
5) vmware_desktop

Enter your choice: 4
==> box: Adding box 'generic/debian10' (v1.9.20) for provider: virtualbox
    box: Downloading: https://vagrantcloud.com/generic/boxes/debian10/versions/1.9.20/providers/virtualbox.box
    box: Download redirected to host: vagrantcloud-files-production.s3.amazonaws.com
==> box: Successfully added box 'generic/debian10' (v1.9.20) for 'virtualbox'!

# initialize ([Vagrantfile] is created on the current path)

root@dlp:~#

vagrant init generic/debian10

A `Vagrantfile` has been placed in this directory. You are now
ready to `vagrant up` your first virtual environment! Please read
the comments in the Vagrantfile as well as documentation on
`vagrantup.com` for more information on using Vagrant.

# start virtual machine

root@dlp:~#

vagrant up

Bringing machine 'default' up with 'virtualbox' provider...
==> default: Importing base box 'generic/debian10'...
==> default: Matching MAC address for NAT networking...
==> default: Checking if box 'generic/debian10' version '1.9.20' is up to date...
==> default: Setting the name of the VM: root_default_1564021739950_83316
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
    default: Adapter 1: nat
==> default: Forwarding ports...
    default: 22 (guest) => 2222 (host) (adapter 1)
==> default: Running 'pre-boot' VM customizations...
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
    default: SSH address: 127.0.0.1:2222
    default: SSH username: vagrant
    default: SSH auth method: private key
    default:
    default: Vagrant insecure key detected. Vagrant will automatically replace
    default: this with a newly generated keypair for better security.
    default:
    default: Inserting generated public key within guest...
    default: Removing insecure key from the guest if it's present...
    default: Key inserted! Disconnecting and reconnecting using new SSH key...
==> default: Machine booted and ready!
==> default: Checking for guest additions in VM...
    default: The guest additions on this VM do not match the installed version of
    default: VirtualBox! In most cases this is fine, but in rare cases it can
    default: prevent things such as shared folders from working properly. If you see
    default: shared folder errors, please make sure the guest additions within the
    default: virtual machine match the version of VirtualBox you have installed on
    default: your host and reload your VM.
    default:
    default: Guest Additions Version: 5.2.0 r68940
    default: VirtualBox Version: 6.0

# show state of virtual machine

root@dlp:~#

vagrant status

Current machine states:

default                   running (virtualbox)

The VM is running. To stop this VM, you can run `vagrant halt` to
shut it down forcefully, or you can run `vagrant suspend` to simply
suspend the virtual machine. In either case, to restart it again,
simply run `vagrant up`.

# connect to virtual machine with SSH

root@dlp:~#

vagrant ssh

vagrant@debian10:~$

vagrant@debian10:~$ exit

# stop virtual machine

root@dlp:~#

vagrant halt

==> default: Attempting graceful shutdown of VM...

# if you'd like to change settings of virtual machine, edit Vagrantfile

root@dlp:~#

vi Vagrantfile

# for example to change CPU and Memory settings

# uncomment line 57 like follows and add or change values

  config.vm.provider "virtualbox" do |vb|
  #   # Display the VirtualBox GUI when booting the machine
  #   vb.gui = true
  #
  #   # Customize the amount of memory on the VM:
     vb.memory = "4096"
     vb.cpus = 2
  end

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