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Managing Users and Security
System Users
The system prevents access from unauthorized users. A group manager or super ID user
assigns each user a unique user name and user ID to each user. To log on to systems that
require passwords, a user must enter the user name or ID and the password.
NonStop™ Kernel system users fall into one of these classes, indicated by the user ID:
General users
Group managers
System operators
Super ID users
Identifying System Users
Each system user has a unique user name and user ID in the form:
group-name.user-name
where group-name is the group to which the user belongs, and user-name identifies the
individual user within the group.
A user ID is a pair of integers in the form:
group-id,user-id
where group-id identifies the user's group, and user-id identifies the user within the
group. Each integer is in the range 0 through 255.
All user names and user IDs are kept in a system file. During a logon procedure, the
system checks this file to ensure that the user name in the LOGON command is valid
and that the correct password, if required, is supplied.
Log on to a system to run one or more specific applications such
as a text editor or manufacturing application. (General users are
sometimes called application users.)
Are responsible for members of a specific group on the system.
The user ID is n,255, where n is the number of the group.
Perform various system functions such as managing system files,
disks, and other devices. The user is ID 255,n, where n is an
integer from 1 to 254.
Can access files, processes, and devices for the entire system
with no restrictions. The user ID is 255,255.
Guardian User's Guide —425266-001
16 -10
System Users
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