I am trying to setup automated mounting of my vbox shared folders. Everything works just fine from my normal user:

$ sudo mount -t vboxsf vagrant /media/sf_vagrant

However if I follow the manual from upstream here, then I cannot even reboot. systemd report an error in Unit media-sf_vagrant.mount. The message states Failed to mount /media/sf_vagrant.

Here is the line I added to fstab (per upstream doc):

$ cat /etc/fstab
vagrant   /media/sf_vagrant   vboxsf   defaults  0   0

If that matter I am using a debian testing (stretch) on amd64 (aka Debian 8). And the window manager is Xfce.


This is not clear why the official documentation does not work for me. But I found the solution reading this.

The solution is a simple one liner on debian:

$ sudo adduser <user> vboxsf

Simple replace <user> with your actual user name, and then reboot.

On fedora:

$ sudo usermod -a -G vboxsf <user>

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