# z/OS Command Interface

The z/OS console can check on the status of components and interfaces that are operating in the Substation ES region. For example, you can identify pending requests and manage them from this console.

Substation ES supports z/OS Command Interface, which is the default command interface for Substation ES. You can enter commands on the console by specifying a modify command. You can shut down an active Substation ES instance normally with a stop command. See the z/OS System Commands manual for the syntax and usage of those commands.

Two examples are shown as follows:

- `F [jobname.]identifier,HELP`: lists the available commands and keywords.
- `P [jobname.]identifier`: stops an active Substation ES instance.

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