Who has something open on the laptop drive?

[Jeremy C. Reed]

On Tue, 21 Jun 2011, Pierre Abbat wrote:

> I wrote a shell script to unmount the laptop drive and got this:
> 
> # umountl
> umount: unmount of /mnt/home failed: Device busy
> umount: unmount of /mnt failed: Device busy
> 
> There are no mount points inside /mnt/home and no processes with the working 
> directory on the laptop drive. There are no programs that I know of that have 
> files open on the laptop drive. How can I find who has a file open there?

fstat