From: https://help.ubuntu.com/community/AutomaticallyMountPartitions

From: https://help.ubuntu.com/community/Autofs

Also, auto-fs is great, it will dynamiclaly mount and unmount points based on use. For example, if your mount point resides on the network, it may be bandwidth-inefficient to have it mounted 100% of the time, even when it’s not in use. Auto-FS will mount nfs partitions dynamically as needed, thus potentially saving on bandwidth. I’m copying here in case this ever disappears.
PDF Below:
AutomaticallyMountPartitions