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Old 08-24-2010, 08:33 PM   #1
Registered: Aug 2009
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Can't mount shared folders in VBox guest; can't modprobe vboxvfs either...

I'm trying to share a folder between my host and a Pinguy OS 10.04 virtual machine I've set up (it's based on Ubuntu), but I can't mount the shared folder in the filesystem, and it's giving the error:

mrcode@pinguyosvm64:~$ sudo mount -t vboxsf Sounds /mnt/vboxshared
/sbin/mount.vboxsf: mounting failed with the error: No such device
Now, I have the Guest Additions installed, and everything else is working fine (mouse integration, OpenGL support, etc.), it's just the shared folder support that seems to be missing.

I Googled the error message and found that I need to have the vboxvfs module loaded in order to mount shared folders. So I do lsmod | grep "vbox" and get this:

vboxvideo               1932  2
drm                   199268  3 vboxvideo
vboxguest             175419  8
Okay, so the module isn't loaded...but modprobe vboxvfs fails:

mrcode@pinguyosvm64:~$ sudo modprobe vboxvfs
FATAL: Module vboxvfs not found
Then I tried reinstalling the Guest Additions, thinking that maybe compiling the vboxvgs module had failed the first time...nope, it built successfully, and yet it doesn't show up in the module list, nor can I modprobe it.

I'm quite stumped as to how this problem happened...all I wanted to do was grab a sound file from the system (can't do it by mounting the ISO; it's usually crammed in a squashfs compressed filesystem ), and yet I'm having to go through all this crap to try to get my host directory mounted into the VM's filesystem.

Is there anything else I can try? I can't seem to get ssh connectivity between the two systems, either, but maybe that's because I'm not trying hard enough...
Old 08-26-2010, 10:52 AM   #2
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try adding to your /etc/fstab file

Share /mnt/vboxshared vboxsf auto,uid=xxx,noexec,rw 0 0

Where Share is the name you have given the folder in the VirtualBox manager, /mnt/vboxshared is your mount point and uid=xxx is changed to reflect your user id, allowing you to mount the beast.
Old 08-27-2010, 05:32 AM   #3
Registered: Aug 2009
Location: Oregon, USA
Distribution: Arch
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Original Poster
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Well...your suggestion didn't quite work (probably because it does the FS mounting before Guest Additions modules are ever loaded), but I got my file nonetheless.

I went around the (very) long way: I found that the sound I wanted was the login sound from Ubuntu Studio, so I grabbed an ISO of that, installed it in its own little VM, installed Guest Additions in that, and since they work properly there, I was able to transfer it nice and easy. I know, I know, I probably could have just searched the 'net for the audio clip, but the bonus of what I did instead is that I now have a new distro to play with.

Thanks anyway for the suggestion.
Old 08-30-2012, 03:35 PM   #4
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Registered: Aug 2012
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Linux Mint 12 on VirtualBox

I don't know about other distro's of Linux but this worked for me on Linux Mint 12

In the terminal run "sudo mount -t vboxsf sharename mountpoint" where "sharename" is what you called the folder in VirtualBox settings manager (in my case, "Users"), and "mountpoint" is where you are placing the share on the Linux host machine (in my case, Desktop/Users). Enter you password if prompted and continue.

From what I have seen wrote on this in earlier posts it seems that their are lots of Syntax errors:

This is the command I used:

sudo mount -t vboxsf Users Desktop/Users

sudo mount -t vboxsf Users ~/Desktop/Users


sudo mount -t vboxsf Users ~Desktop/Users


sudo mount -t vboxsf Users /Desktop/Users
Old 09-07-2012, 08:36 AM   #5
Registered: Sep 2006
Location: wroclaw, poland
Distribution: slackware 12.2, scientific linux 6.4, knoppix 7.2, salix 14.1
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Strange. I'm mounting shared folders but with 'vboxsf' module. Where did you get 'vboxvfs'?
 bash-3.1$ lsmod | grep vbox
vboxsf                 42312  0 
vboxguest             192648  4 vboxsf
 bash-3.1# mount -t vboxsf RodStewart /mnt/hd
Note that at the end is '-sf'. In that order: sf. Not 'fs' like 'file system'. A bit irritating. For me logically it should be 'vboxfs' - acronym for 'vbox file system' - but ...


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