System programmer commands

The following system programmer commands are submitted primarily by an authorized system programmer who uses the HSENDCMD command to issue these commands from a TSO terminal. They can also be submitted by an authorized user from a TSO terminal or by a system operator from the system console.
DISPLAY
Displays DFSMShsm storage locations
FIXCDS
Displays or modifies MCDS, BCDS, and OCDS records
PATCH
Modifies storage within DFSMShsm
TRAP
Requests a dump when a specified error occurs
UPDATEC
Recovers the control data sets
Note: DISPLAY, FIXCDS, PATCH, and TRAP are commands used only for maintenance and are explained in the z/OS DFSMShsm Diagnosis.