Nortel Networks 4050 User Manual

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354 Chapter 8 Managing system users and groups
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User rights and group membership
There are three groups of system users who routinely access the system for 
configuration and management:
admin (administrator)
certadmin (certificate administrator)
oper (operator)
Group membership dictates user rights, as shown in 
a user is a member of more than one group, user rights accumulate. The admin 
user, who by default is a member of all three groups, therefore has the same user 
rights as granted to members in the certadmin and oper group, in addition to the 
specific user rights granted by the admin group membership. The most permissive 
user rights become the effective user rights when a user is a member of more than 
one group. For more information about default user groups and related access 
levels, see 
Note: There are two additional types of users with specialized 
functions: boot and root. For more information, see 
Table 68   
Group membership and user rights
Group 
Account
User
account
Rights
System
Group
Password
Add user Delete user Add user
Delete user Change own Change others
admin
admin
Yes
Yes
Yes, to own 
group
Yes
Yes
Yes, if Admin is 
a member of 
the other user’s 
first group
certadmin
admin
No
No
Yes, to own 
group
No
Yes
No
oper
oper 
admin
No
No
Yes, to own 
group
No
Yes
No