HOW TO ENABLE A SHARED FOLDER BETWEEN WINDOWS AND LINUX ?

We will make "C:/shared" in Windows be visible as ~/shared in Linux.
That is, you should be able to see the directory 'shared' in your home directory
immediately after logging to your Linux account.

STEP 1 (Windows host)
------------------------
Enable shared folders in your VirtualBox GUI:
1. Goto Oracle VM Virtal BoxManager GUI (in Windows of course)
2. Goto: Machine -> Settings -> Shared Folders -> Machine Folders
3. Click the plus sign icon
4. In the dialog, enter the path "C:\shared"
5. Uncheck 'Auto-mount' option and check 'Make Permanent' option.
   This will make sure when the virtual machine restarts,
   the folder will still be accessible inside the machine

STEP 2 (Linux guest)
----------------------------
6. In your Linux machine open a simple X terminal (xterm), and run the following
   command line:
      1.  su
      2.  echo "Shared /media/sf_Shared vboxsf defaults,rw,uid=1000,gid=100 0 0" >> /etc/fstab
      3.  exit
      4.  ln -s /media/sf_Shared ~/shared

   In command 1 (su) you will be asked to enter root password (since you are writing a system file)

7. Reboot the Linux machine and you should see the directory shared under your home
   directory - you will be able to access it from windows as well under "C:\shared"