Who has something open on the laptop drive?

[Pierre Abbat <phma@xxxxxxxxxxxxx>]

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?

Pierre
-- 
Jews use a lunisolar calendar; Muslims use a solely lunar calendar.