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I have Ubuntu installed in Virtualbox. I want to mount my VirtualBox shared folder in Ubuntu automatically when I log in Ubuntu. I put the following line in my ~./bashrc and ~/.bash_profile:

sudo mount -t vboxsf windows_share /media/windows_share

where windows_share is the name I created with Virtualbox. But everytime I start my Ubuntu, it asks me for passwd since it needs sudo. Is there anyway to automatically mount Windows share without entering password every time I log in?

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2 Answers 2

up vote 31 down vote accepted

To always mount a Virtual Box "shared folder" on booting an Ubuntu guest we have two options. It is up to personal preference which option works best in our setting.

1. Mount with fstab

To mount a shared folder using the vboxsf filesystem provided with Guest Additions we first need to make sure prerequisites are met. Then we may put the following line in our etc/fstab file:

<name_of_share>   /path/to/mountpoint   vboxsf   <options>  0   0

Replace name_of_share and /path/to/mountpoint with your individual setup (the directory for the mountpoint has to be created first). See the manpage for mount for mount <options>. One possibility is to mount with defaults, or to give specific mount options (e.g. rw, suid, exec, auto, users).

On some systems the vboxsf kernel module is not yet loaded at the time fstab is read on boot. It may then help to append the vboxsf kernel module to /etc/modules.

2. Mount with Virtual Box "automatic mounting":

In recent releases of Virtual Box we can also automatically mount shared folders on creation:

enter image description here

After a reboot of the guest this shared folder will be mounted to the guest directory /media/<username>/sf_<name_of_share> accessible to all users who had been made member of the group vboxsf.

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How do you change the mount directory and mount prefix? Do you run some terminal commands in the HOST OS or the GUEST OS? –  CMCDragonkai Jan 18 '14 at 12:12
This feature requires that the "virtualbox-guest-utils" service has started, and on Ubuntu 14.04 this service starts later than the filesystems are mounted. This is the reason for "device not found" error when mounting the shares through fstab –  kolypto May 13 '14 at 14:58
@kolypto, that's a good observation. Any idea of how to reorder their loading order? –  garromark May 17 '14 at 2:35
@garromark, my only idea is to create an upstart script, which is quite simple. Another option is to put the same fstab entry, but add "noauto" so you just mount it manually. –  kolypto May 19 '14 at 21:56
@kolypto, thanks for getting back to me. I actually found two competing solutions, only one of which worked for me: Option 1) (Worked for me), is, as you said, to put noauto in the fstab options and then to later mount typically in a startup script (such as .profile), Option 2) the main issue being that vboxsf isn't loaded prior to fstab running, append vboxsf to the file /etc/modules, asking the kernal to load the module prior to fstab being run. Maybe this will help someone else. –  garromark May 20 '14 at 22:11
sudo gedit /etc/rc.local

On line 13 before 'exit0' type:

mount.vboxsf windows_share /media/windows_share vboxsf


create a shortcut to the desktop or home folder:

ln -s /media/windows_share /home/freddy/Desktop

In order to boot without errors like pressing S to skip mount or press M to manually repair you may have to delete your entry in fstab

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