Vagrant hangs at boot/GRUB (FIX)

When Vagrant hangs at boot time and GRUB is being displayed, then perform the following steps to get your vagrant machine working again.

  1. Stop the machine using the Virtualbox GUI
  2. Start the machine using the Virtualbox GUI
  3. Perform “update-grub” as root user (or with sudo)
  4. Stop the machine using the Virtualbox GUI
  5. Start the machine headless using “vagrant up”