I am very new in Linux. I installed fedora in Virtual Box with host windows xp. I want to share file between host and guest. Someone suggest me to run the command in fedora #sudo mount -t vboxsf -o uid=1000,gid=1000 F_DRIVE /home/menjar/Desktop/xp where F_DRIVE is the F drive in xp I am sharing and 'xp' is the folder in fedora where I want to mount. Now It works but when I reboot, I can't see the contents of xp folder anymore. After goggling I find a suggestion that say to add the command in /etc/rc.local file. I am very new in linux so I want to know how do I do this. I have tried to do this by using vi editor by running #vi /etc/rc.local and I add the line sudo mount -t vboxsf -o uid=1000,gid=1000 F_DRIVE /home/menjar/Desktop/xp where F_DRIVE and save by pressing Esc and then :wq but after doing I couldn't see any result. It still doesn't work. So please explain how do I do this step by step ( I am very new and don't know anything about Linux)? Am I doing something wrong with the command? should I have to place a '#" in front of the command while placing the line in /etc/rc.local? Please explain how do I solve it in detail.. I am waiting for your answer.

Fedora (unfortunately sometimes) is a very dynamic distro. Things are always changing - rc.local for instance.
Nowadays it's called /etc/rc.d/rc.local

You can simply rename ("mv" to a new name) your current file - but you should also remove the "sudo ", it's not needed when the command is issued in rc.local. As root do this to rename that file

just add the line to fstab, there are already proper mechanisms for doing what you want. I expect the line:

F_DRIVE /home/menjar/Desktop/xp vboxsf uid=1000,gid=1000

will work fine. don't mess with rc.local if you don't need to.

Yep, that should work for a normal (FSVO "normal") Fedora install.
I am so used to having /home on a separate partition - I have to use rc.local for this sort of thing.

I'm forever answering the question, rather than solving the OP's problem, not always the same thing!

why does a separate /home necessitate using rc.local?

It appears you can't guarantee the mount for /home completes before anything that needs to mount under a sub-directory of /home is initiated if both are in fstab. Last I checked (F16), it still applied.
I haven't chased it vigorously, I just found a work-around that works (for me).

Hope you restarted the system after adding the line as it will not take effect unless you don't restart.

And don't put a "#" before the command, that would comment out the command and it will not be executed