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MOUNT AND UMOUNT

To mount all file system mentioned in the /etc/fstab use
mount -a

The mountpoint can be binded to a new directory. So that you would be able to access the contents of a filesystem via more than one mountpoints at the same time.
mount -B /mydir /mnt
Mount allows you to access the contents of a mount point from a new mount point. Its nothing but move a mounted tree to another place.

 mount -M /mydir /mnt

 mount -n this wont update the data in /etc/mtab

 Lazy umount 

 umount -l  /mydir

Forcefully

 umount -f /mydir
to see the process holding the directory

 fuser -cu /mydir
Mount an ISO image to a directory

 
# mount -t iso9660 -o loop pdf_collections.iso /mnt
# cd /mnt
# ls
perl/    php/    mysql/

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