shared folder between virtualbox and host

1. Create a folder on host like this:

    F:\Shared

2.On VirtualBox Manager:

   Settings-Shared Folders-Add shared folder

   Folder Path: select the one you create above

   Folder Name: use the default one

   tick "Auto-mount"  and "Make permanent" and then save it.

3.Open terminal on Ubuntu on VirtualBox:

   sudo mount -t vboxsf Shared zhiguang/Win_Lin/

   # zhiguang/Win_Lin/ is the corresponding folder for Shared, you should create it before running this command

   then once you put files in  F:\Shared, you can share and edit them in zhiguang/Win_Lin/ immediately.