Vagrant box check update configuration error (resolved: upgrade Vagrant)

Vagrant box check update configuration error

The following settings don't exist: box_check_update

Commenting out this made it work fine:

# config.vm.box_check_update = true

But the better solution is to upgrade Vagrant.

The reason for the error is that Vagrant version 1.2.2, rather than 1.5 or 1.6, simply didn't know about that configuration setting, and complained, and quit.

Solution: Update your Vagrant. On Ubuntu or any Debian package managing system this is as easy as going to http://vagrantup.com/downloads and downloading the Linux (Deb) file. In a graphical interface you can just double-click this file, it will open the software updater and offer to upgrade your Vagrant. Do it and be happy!