z/VM: CP Commands and Utilities Reference - z/VM - IBM

Chapter 1. Introduction
Using Commands
In this introduction, the term command is used generically; it refers to both CP
commands and CP utilities.
z/VM uses command languages to correspond to the two environments it creates,
control program and virtual machine.
Use the control program (CP) command language when:
v You are a z/VM system operator and you want to control the resources of the
real machine located in your computer room.
v You are a virtual machine user and you want to control your virtual machine’s
configuration and environment.
Use a virtual machine command language when:
v You are communicating with the operating system you loaded into your virtual
machine.
To perform production or test work, load your virtual machine with one of the
operating systems supported by the z/VM system. Your virtual machine command
language is the command language of the operating system you load. This
command language is described in the library that documents that particular
operating system.
To perform service, installation, and maintenance tasks, along with editing
and text creation, communicating with others, and problem solving, load
your virtual machine with the conversational monitor system (CMS). CMS is a
single user, conversational operating system.
You can use CP commands whenever:
v Your virtual machine is in the control program (CP) command environment. Your
virtual machine is in the CP environment when you log on to z/VM and CP READ
is displayed in the lower right-hand corner of the screen. On a line-mode ASCII
device, there is no status area to display CP READ, so CP is displayed in the output
area.
v You press the break key while in full-screen mode before entering a command.
(The break key may be PA1, the VM default break key, or another key that you
have defined as the break key using the TERMINAL BRKKEY command. Also,
the break key may be totally disabled by some application programs or when in
the protected application environment.)
v You are in a virtual machine command environment, not running in full-screen
mode, and enter the #CP command (and # is your logical linend character).
v You are in the CMS virtual machine environment and enter the CP command.
v You are in the CMS virtual machine environment and have the IMPCP function
set ON.
To determine the current command environment on a 3270 device, look at the
status area in the lower right-hand corner of the display screen. CP READ indicates
the CP environment, and VM READ indicates the virtual machine environment. If you
are running CMS in your virtual machine, VM READ indicates the CMS environment.
When RUNNING appears in the status area, enter a null input line to determine your
environment. (To enter a null line, press the ENTER key but do not enter any data.)
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