SYSTEM command (z/OS)

The SYSTEM command lets you issue TSO commands during a z/OS® Debugger session. The SYSTEM keyword can only be abbreviated as SYS.

Read syntax diagramSkip visual syntax diagramSYSSYSTEMsystem_command;
system_command
A valid TSO system command or CLIST name that does not require a parameter.

Usage notes

  • No parameters can be specified as part of the system command or CLIST invocation. To execute noninteractively when parameters are required, you must enter the complete invocation in a CLIST and then use a TSO or SYSTEM command to call that CLIST (without parameters).
  • You cannot introduce a new z/OS Debugger session using the SYSTEM command.
  • When operating interactively in TSO, there is no provision for entering a mode where commands are accepted repeatedly; however, it is possible to write your own such iterative sequence in a CLIST.
  • You cannot issue CICS® commands using SYSTEM.

Examples

  • List all the data sets in the user catalog. 
    SYSTEM LISTCAT;
  • Temporarily places you in ISPF mode. 
    SYSTEM PDF;

Refer to the following topics for more information related to the material discussed in this topic.