Vagrant error : Failed to mount folders in Linux guest

Question

I have some issues with Vagrant shared folders, my base system is Ubuntu 13.10 desktop.

I do not understand why I have this error is something that is not right conf

Answer 1

(from my comment above)

Following the problem to it's roots: , specifically the part in the comments saying this:

wget https://www.virtualbox.org/download/testcase/VBoxGuestAdditions_4.3.11-93070.iso‌​ 
sudo cp VBoxGuestAdditions_4.3.11-93070.iso /Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso

After doing that, I have business as usual with all my virtual machines (and their current Vagrantfiles, of course)

When you have to do something in a freshly created virtual machine, to make it work, something is wrong.