How to share the Folder from Host Window 7 OS with virtually installed Ubuntu

1. create a folder in Host windows OS, which is to be shared
2. Go to Devices in  Oracle Virtual BOX select

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3. select the folder to be shared as shown above, make it permanent 

4. go to the terminal and go to media directory  $ cd /etc/media

5. make a new directory with the same name as that of the folder which is to be shared as

$   mkdir udun_share

now enter this command

$  Sudo mount -t vboxsf udun_share /media/udun_share then enter

go to the media and directory named udun_share data is shared between host and virtually installed ubuntu in oracle vitualbox