I'm reviewing the Filesystem Hierarchy Standard and it states:
"Shareable" files are those that can be stored on one host and used on others. "Unshareable" files are those that are not shareable. For example, the files in user home directories are shareable whereas device lock files are not.
I know that a device lock file is a file created when a process is in use. And obviously that information shouldn't be placed on different host computer, but at the same time, why would you want to place the files in a user's home directory on another host computer? Is that not a security risk? I don't really see why we should categorize files as shareable and unshareable, or maybe I misunderstood the concept?