I'm not sure, but typically the "mnt" folder on most linux distributions is only for mounting temporary devices (like USB sticks). I wouldn't be surprised if there was some kind of automatic cleanup of that folder when starting up or shutting down the computer. That might be why it disappears. Is it part of the instructions to reboot after having done that step? And is it necessary that this folder be put at that location? Maybe some place other than the "mnt" folder would be a better idea.
mike_2000_17
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Actually, /mnt should not be cleaned up, as /tmp may be upon rebooting. It is possible that the user has /mnt mounted (sic) from a volatile device, such as a ram disc. In any case, I have never had a problem with stuff in /mnt going away. Normally, dynamic device mounts (usb drives, etc) usally go into /media.
FWIW, I have done the LFS project and had no problems of this sort. In my opinion, it is a GREAT way to learn the internals of Linux systems.
rubberman
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