Topic: ipl

• z/OS system operations basics: console commands, SYSLOG/OPERLOG, and what an IPL is

  Console commands like D A,L (list active jobs) and D IPLINFO (display IPL information) are the read-only starting point for understanding what a z/OS system is doing; SYSLOG and OPERLOG are where system messages accumulate, and an IPL (Initial Program Load) is the mainframe's equivalent of a full system boot, not something to trigger outside a planned change window.

  article · en · reviewed · knowledge as of 2026-09-24

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