In order to see the shared folders by virtualbox in ubuntu server we need to install the virtualbox guest additions.
apt-get install dkms
mount /dev/cdrom /media/cdrom
/media/cdrom/VBoxLinuxAdditions.run
Note
Ignore the X11 errors
Add user to
vboxsf group
usermod -a -G vboxsf [username]
After reboot the the shared folder should be visible under /media/
Tip
The folder can also be mount manually via fstab
[share name] [mount point] vboxsf noauto,rw,uid=33,gid=33,umask=0002 0 0
mount [mountpoint]
Important
The manual mounting is importand , since fstab is porcessed before the vboxsf modules are loaded!