$ git --versiongit version 2.7.4VirtualBoxVersion 5.1.26 r117224 (Qt5.5.1)
$ ansible --versionansible 2.3.2.0config file =configured module search path = Default w/o overridespython version = 2.7.12 (default, Nov 19 2016, 06:48:10) [GCC 5.4.0 20160609]$ vagrant -vVagrant 1.8.1
$ cd imouto #ignore if already in the imouto directory
$ vagrant plugin install vagrant-proxyconf
$ vagrant plugin install vagrant-proxyconfInstalling the 'vagrant-proxyconf' plugin. This can take a few minutes.../usr/lib/ruby/2.3.0/rubygems/specification.rb:946:in `all=': undefined method `group_by' for nil:NilClass (NoMethodError)from /usr/lib/ruby/vendor_ruby/vagrant/bundler.rb:275:in `with_isolated_gem'from /usr/lib/ruby/vendor_ruby/vagrant/bundler.rb:231:in `internal_install'from /usr/lib/ruby/vendor_ruby/vagrant/bundler.rb:102:in `install'from /usr/lib/ruby/vendor_ruby/vagrant/plugin/manager.rb:62:in `block in install_plugin'from /usr/lib/ruby/vendor_ruby/vagrant/plugin/manager.rb:72:in `install_plugin'from /usr/share/vagrant/plugins/commands/plugin/action/install_gem.rb:37:in `call'from /usr/lib/ruby/vendor_ruby/vagrant/action/warden.rb:34:in `call'from /usr/lib/ruby/vendor_ruby/vagrant/action/builder.rb:116:in `call'from /usr/lib/ruby/vendor_ruby/vagrant/action/runner.rb:66:in `block in run'from /usr/lib/ruby/vendor_ruby/vagrant/util/busy.rb:19:in `busy'from /usr/lib/ruby/vendor_ruby/vagrant/action/runner.rb:66:in `run'from /usr/share/vagrant/plugins/commands/plugin/command/base.rb:14:in `action'from /usr/share/vagrant/plugins/commands/plugin/command/install.rb:32:in `block in execute'from /usr/share/vagrant/plugins/commands/plugin/command/install.rb:31:in `each'from /usr/share/vagrant/plugins/commands/plugin/command/install.rb:31:in `execute'from /usr/share/vagrant/plugins/commands/plugin/command/root.rb:56:in `execute'from /usr/lib/ruby/vendor_ruby/vagrant/cli.rb:42:in `execute'from /usr/lib/ruby/vendor_ruby/vagrant/environment.rb:268:in `cli'from /usr/bin/vagrant:173:in `<main>'
$ vagrant up
No usable default provider could be found for your system.Vagrant relies on interactions with 3rd party systems, known as"providers", to provide Vagrant with resources to run developmentenvironments. Examples are VirtualBox, VMware, Hyper-V.The easiest solution to this message is to install VirtualBox, whichis available for free on all major platforms.If you believe you already have a provider available, make sure itis properly installed and configured. You can see more details aboutwhy a particular provider isn't working by forcing usage with`vagrant up --provider=PROVIDER`, which should give you a more specificerror message for that particular provider.