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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
Someone once observed that “the difference between roles and groups isthat a user can shift into and out of roles, whereas that user has a groupidentity (or identities) that are fixed throughout the session.”a. Consider a system such as a Berkeley-based UNIX system, in whichusers have secondary group identities that remain fixed during theirlogin sessions. What are the advantages of roles with the sameadministrative functions as the groups?b. Consider a system such as a System V-based UNIX system, in whicha process can have exactly one group identity. To change groups,users must execute the newgrp command. Do these groups differfrom roles? Why or why not?
