Group definition operations available in ctadmn are as follows:
Add New Group by:
Entering a new Group ID.
(optional) Entering a long name (i.e., a text string) for use as a Group Description (e.g., to display, where the Group ID may be too terse).
(optional) Entering a Group Memory Allocation, which is a maximum memory allocation for Users who are a member of this particular Group, and will override maximum memory allocations set at the server-level (for any user).
Remove an Existing Group ID.
List Groups: List all current Group IDs and descriptions.
Change Group Membership: Add or remove User IDs from a given Group.
Change Group Description: Change the long name for the Group ID.
Change Group Memory: Change the maximum amount of server memory user in a given group can consume.
Change Group Logon Limit: Limit users to a specified number of concurrent logons based on their group membership. By default, the limit is zero, meaning no limit.