vagrant : Failed to mount folders in Linux guest, “vboxsf” file system is not available?

Question

I have VirtualBox 4.3.10 and Vagrant 1.4.3 installed on my Ubuntu 14.04 64 bit Desktop.

Earlier, worked with

Answer 1

Apparently there is a bug in the VirtualBox Guest Additions 4.3.10 installer: https://www.virtualbox.org/ticket/12879

There seems to be a simple workaround to this, by creating a symbolic link within Vagrant-VM:

sudo ln -s /opt/VBoxGuestAdditions-4.3.10/lib/VBoxGuestAdditions \
/usr/lib/VBoxGuestAdditions

You could add this to your provisioning configuration to make sure you don't hit the bug again:

NEWEST_VBOXGUESTADDITIONS_DIR=`find /opt/ -maxdepth 1 -mindepth 1 -name "VBoxGuestAdditions-*" | tail -n 1`;
if [[ ! -d "/usr/lib/VBoxGuestAdditions" && -n "$NEWEST_VBOXGUESTADDITIONS_DIR" ]];
then
    ln -s ${NEWEST_VBOXGUESTADDITIONS_DIR}/lib/VBoxGuestAdditions /usr/lib/VBoxGuestAdditions
fi