Provisioning in vagrant

1.Allows to install software automatically
2.Alter configurations
3.you can install software manually(it is not advisable for repeatable task)
4.you can vagrant destroy and vagrant up and have a fully ready-to-go work environment with a single command.

The shell provisioner takes various options. One of inline or path is required:
1.inline (string) - Specifies a shell command inline to execute on the remote machine. See the inline scripts section below for more information.

2.path (string) - Path to a shell script to upload and execute. It can be a script relative to the project Vagrantfile or a remote script (like a gist).

3.args (string or array) - Arguments to pass to the shell script when executing it as a single string. These arguments must be written as if they were typed directly on the command line, so be sure to escape characters, quote, etc. as needed. You may also pass the arguments in using an array. In this case, Vagrant will handle quoting for you.

Sample Examples:

Vagrant.configure("2") do |config|
  config.vm.provision "shell",
    inline: "echo Hello, World"
end

$script = <<SCRIPT
echo I am provisioning...
date > /etc/vagrant_provisioned_at
SCRIPT

Vagrant.configure("2") do |config|
  config.vm.provision "shell", inline: $script
end

Vagrant.configure("2") do |config|
  config.vm.provision "shell", path: "script.sh"
end

Vagrant.configure("2") do |config|
  config.vm.provision "shell", path: "https://example.com/provisioner.sh"
end

Vagrant.configure("2") do |config|
  config.vm.provision "shell" do |s|
    s.inline = "echo $1"
    s.args   = "'hello, world!'"
  end
end

Vagrant.configure("2") do |config|
  config.vm.provision "shell" do |s|
    s.inline = "echo $1"
    s.args   = ["hello, world!"]
  end
end