Vagrant Reinstall Dilemma

[Ethan Rips]

My VVV/VirtualBox setup had to be wiped out & reinstalled. Having deleted everything, I first installed VirtualBox 5.0 & after verifying that, I tried to install vagrant 1.8.1, only to receive this error message:

"$ vagrant up

Vagrant has detected that you have a version of VirtualBox installed

that is not supported. Please install one of the supported versions

listed below to use Vagrant:

4.0, 4.1, 4.2, 4.3"

I know vagrant 1.8.1 is supposed to be compatible with VirtualBox 5.0--those are the two versions recommended on the VVV page on gitHub.

I then deleted vagrant again (or at least, I thought I did). 'vagrant -v' yields the message, "No such file or directory." But 'sudo apt-get install vagrant' yields this:

"...

vagrant is already the newest version.

0 upgraded, 0 newly installed, 0 to remove and 14 not upgraded."

What incredibly obvious thing am I missing?