At times the system administrator needs to lock out all users from accessing the system, log one user off the system, or access the system from another user's ID. The system provides the following functions for the system administrator to perform such lockouts and accesses:
System Lockout of All Users - Before you can resize files, the system must be in a quiet state with no processes running. You must lock the system so that no users can access it to run any more processes. You must then end all processes before resizing files. Once the resizing is done, you can end the lockout and start all processes back up.
Logging a User off the System - At times the system may not respond to a user's commands. You must log this user off and then back on again to force the system to respond to the user. Logging the user off can cause some damage to any processes that user is using. Use the Log off a Port function to log a user off the system and cause the least amount of damage to any programs that the user is running.
Accessing the System Through Another User's ID - Use the Change to Another User function when you need to access the system through that user's ID in order to research the user's current status in the system. When you use this function, you do not need to know the user's password.
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