Using the OS/400 System - IBM - RPG

The operating system that controls all of your interactions with the iSeries system is called the Operating System/400 (OS/400) system. From your workstation, the OS/400 system allows you to:

  • Sign on and sign off
  • Interact with the displays
  • Use the online help information
  • Enter control commands and procedures
  • Respond to messages
  • Manage files
  • Run utilities and programs.

Interacting with the System
You can manipulate the OS/400 system using Command Language (CL). You interact with the system by entering or selecting CL commands. The system often displays a series of CL commands or command parameters appropriate to the situation on the screen. You then select the desired command or parameters.

The following table lists some of the most commonly used CL commands, their function, and the reasons you might want to use them.

Commonly Used Control Language Commands

Commonly Used Control Language Commands

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