When recovering files from
another machine, you might have to execute the chown command to set the user ID and group ID for the system on which
they now reside, if the user and group do not exist on the new system.
If files are recovered to a new system that does not have the specified
group, the files will take on the group ownership of the person running frecover. If owner and group names have different meanings
on different systems, recovery results might be unexpected.