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z/OS – Removing Tasks from the z/OS System 2.5


3 hours



This course describes the processes and commands required to remove tasks, users, and batch jobs from a z/OS system.


Senior computer operators and technical support personnel whose role is to manage system activity.


Successful completion of the z/OS – Identifying z/OS System Problems course, or equivalent knowledge.


After completing this course, the student will be able to:

  • Use the CANCEL Command to Terminate Jobs, Started Tasks, and TSO Sessions
  • End Hung Catalog Requests in an Orderly Way
  • Recognize When and How the FORCE Command is Used
  • Invoke a FORCE Command Procedure

Course Content

Terminating Tasks

CANCEL Command Syntax
Canceling Activity Using SDSF
Listing Catalog Address Space request details
Issuing REDRIVE and NOREDRIVE commands
Abend the Catalog Address Space request

Using the FORCE Command

Using the FORCE Command
FORCE Command Syntax
Before Using the FORCE Command
Consequences of Using the FORCE Command

z/OS – Removing Tasks from the z/OS System 2.5 Mastery Test