# System i5 Debugger

The System i5 Graphical Debugger provides a new graphical user debugging environment on System i5, and consists of several key elements: the client-based System Debugger and Debug Manager and the host-based
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- Debug Manager

  The Debug Manager registers clients with the debug hub to allow the use of the graphical debugging mode for the selected systems. After you register a client, running a STRDBG command from an emulation session on the client starts the graphical debugging mode. The Debug Manager also serves as a convenient launching point for starting debug sessions directly from a client. You start the Debug Manager from the
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- System i5 Debugger

  The System Debugger provides graphical information on the status of debugging activities. You can set up this application to start automatically, use the Debug Manager to start it, or start it manually from the workstation command line.

- i5/OS PASE Debugger

  The PASE Debugger provides graphical information on the status of PASE debugging activities. You can start the PASE Debugger directly from the Debug Manager, or you can start it manually from the workstation command line. For more information, start the PASE Debugger and press F1.

There are three methods of starting the debugging environment: