Question: Someone once observed that the difference between roles and groups is that a user can shift into and out of roles, whereas that user has
Someone once observed that the difference between roles and groups is that a user can shift into and out of roles, whereas that user has a group identity (or identities) that are fixed throughout the session.
a) Consider a system such as a System V-based UNIX system, in which a process can have exactly one group identity. To change groups, users must execute the newgrp command. Do these groups differ from roles? Why or why not?
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