ヾ(oﾟωﾟo)ﾉﾞVagrantの共有ディレクトリ設定でものすっごい躓いた！ ref: http://qiita.com/harapeko_wktk/items/72985bfccaae60c69384

file0.txt

  # Share an additional folder to the guest VM.
  # The first argument is the path on the host to the actual folder.
  # The second argument is the path on the guest to mount the folder.
  # And the optional third argument is a set of non-required options.
  # config.vm.synced_folder "../data", "/vagrant_data"

file1.txt

config.vm.synced_folder ".", "/vagrant" , owner: “harapeko”, groupe: “harapeko”, mount_options: ["dmode=777", "fmode=777"]

file10.txt

* The host path of the shared folder is missing: /vagrant

file11.txt

% vagrant reload
[default] Attempting graceful shutdown of VM...
[default] Clearing any previously set forwarded ports...
[default] Creating shared folders metadata...
[default] Clearing any previously set network interfaces...
[default] Preparing network interfaces based on configuration...
[default] Forwarding ports...
[default] -- 22 => 2222 (adapter 1)
[default] -- 3000 => 3000 (adapter 1)
[default] Booting VM...
[default] Waiting for machine to boot. This may take a few minutes...
[default] Machine booted and ready!
[default] Configuring and enabling network interfaces...
[default] Mounting shared folders...
[default] -- /vagrant
[default] -- /home/vagrant
vagrant reload  34.21s user 5.20s system 67% cpu 58.132 total

file2.txt

% vagrant up
Failed to mount folders in Linux guest. This is usually beacuse
the "vboxsf" file system is not available. Please verify that
the guest additions are properly installed in the guest and
can work properly. The command attempted was:

mount -t vboxsf -o uid=`id -u harapeko`,gid=`getent group harapeko | cut -d: -f3`,dmode=777,fmode=777 /vagrant /vagrant
mount -t vboxsf -o uid=`id -u harapeko`,gid=`id -g harapeko`,dmode=777,fmode=777 /vagrant /vagrant

file3.txt

% vagrant plugin install vagrant-vbguest
% vi ~/.vagrant.d/Vagrantfile

file5.txt

% vagrant vbguest --status        
GuestAdditions versions on your host (4.3.6) and guest (4.2.0) do not match.

% vagrant vbguest --auto-reboot
GuestAdditions versions on your host (4.3.6) and guest (4.2.0) do not match.
Loaded plugins: fastestmirror
Determining fastest mirrors
(省略)
Copy iso file /Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso into the box /tmp/VBoxGuestAdditions.iso
Installing Virtualbox Guest Additions 4.3.6 - guest version is 4.2.0
Verifying archive integrity... All good.
Uncompressing VirtualBox 4.3.6 Guest Additions for Linux............
VirtualBox Guest Additions installer
Removing installed version 4.2.0 of VirtualBox Guest Additions...
Copying additional installer modules ...
Installing additional modules ...
Removing existing VirtualBox DKMS kernel modules[  OK  ]
Removing existing VirtualBox non-DKMS kernel modules[  OK  ]
Building the VirtualBox Guest Additions kernel modules[  OK  ]
Doing non-kernel setup of the Guest Additions[  OK  ]
You should restart your guest to make sure the new modules are actually used

Installing the Window System drivers[FAILED]
(Could not find the X.Org or XFree86 Window System.)
An error occurred during installation of VirtualBox Guest Additions 4.3.6. Some functionality may not work as intended.
In most cases it is OK that the "Window System drivers" installation failed.

% vagrant vbguest --status     
GuestAdditions 4.3.6 running --- OK.

file6.txt

% vagrant reload
Failed to mount folders in Linux guest. This is usually beacuse
the "vboxsf" file system is not available. Please verify that
the guest additions are properly installed in the guest and
can work properly. The command attempted was:

mount -t vboxsf -o uid=`id -u harapeko`,gid=`getent group harapeko | cut -d: -f3`,dmode=777,fmode=777 /vagrant /vagrant
mount -t vboxsf -o uid=`id -u harapeko`,gid=`id -g harapeko`,dmode=777,fmode=777 /vagrant /vagrant

file7.txt

% vagrant ssh
sudo /etc/init.d/vboxadd setup
exit
% vagrant reload
Failed to mount folders in Linux guest. This is usually beacuse
the "vboxsf" file system is not available. Please verify that
the guest additions are properly installed in the guest and
can work properly. The command attempted was:

mount -t vboxsf -o uid=`id -u harapeko`,gid=`getent group harapeko | cut -d: -f3`,dmode=777,fmode=777 /vagrant /vagrant
mount -t vboxsf -o uid=`id -u harapeko`,gid=`id -g harapeko`,dmode=777,fmode=777 /vagrant /vagrant

file8.txt

config.vm.synced_folder "/vagrant", "/home/vagrant", owner: "vagrant", group: "vagrant", mount_options: ["dmode=777", "fmode=777"]

file9.txt

There are errors in the configuration of this machine. Please fix
the following errors and try again:

vm:
* The host path of the shared folder is missing: /home/vagrant/

Vagrantfile

Vagrant.configure("2") do |config|
  config.vbguest.auto_update = false
end