A list of names of users and user groups that are members of the group. The user name must be a valid login name. The group may be defined recursively but must not create a loop. The reserved word all may be used to specify all users. Each name is separated by white-space.
Shares determine the static priority of users or user groups relative to each other.
So the values of shares only make relative sense. The share tree defined in this section have no effect unless it is actually used by a share provider, such as a queue or host partition. This section is optional. It is used to define the maximum number of jobs that can be run concurrently for specific users or user groups. This avoids the situa- tion where a specific user occupies all or most of the resources of the system while other users' jobs are waiting.