virtualbox.org

I have windows XP sp3 running as a host and Ubuntu 8.10 as a guest. I am trying to share a folder between the two platforms. I have created a folder in windows XP called ubuntu and set the sharing properties and with the VMUbuntu off I have gone to share folders and set the path C:\ubuntu
I have also installed the guess additions.

Here is where my problem starts. I try to set it in Ubuntu as well
I had created a folder

sudo mkdir ubuntu

then

sudo mount -t vboxsf ubuntu /media/share

I get this message:

/sbin/mount.vboxsf: mounting failed with the error: No such device

What am I doing wrong?
Also what can I do to make it run when it boots.

Shared Folders need to be defined on the VM settings, not the Sharing properties of the folder in Explorer. You can add the mount line in /etc/fstab, but users (including me) reported that it doesn't mount properly and you have to manually run a sudo mount -a to mount it. The other, working method others have used, is to simply add the mount command in /etc/rc.local, so it runs after the VB modules are loaded.

Thanks everyone for your help. I figured what I was doing wrong and I am posting a solution for the next person that has a similar problem.

This step might be kind of obvious for a lot of people, but it was not for me.

1. sudo apt-get install build-essential

2. then add the guest additions as indicated in the manual section 4

3. create a directory if you want

sudo mkdir /mnt/windowsxp

This step can be avoid as long as you know exactly where is the folder that you want to share

4. sudo mount -t vboxsf ubuntu /mnt/windowsxp

*ubuntu is the name of the folder that I created in Windows XP and I decided to share.

5. This step is not necessary, but I got a lot of references from previous versions of virtualbox, so you might need it.
This is to start the sharing at booting or something like that:

sudo gedit /etc/fstab

Add this line

ubuntu /mnt/windowsxp vboxsf rw,uid=1000,gid=1000 0 0

that is it!