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

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machine simulating the ESA/390 architecture (or z/Architecture, if a guest has
issued the instruction to change the architecture of the virtual machine).
4. If your installation is using the password suppression facility for the LOGON
command (controlled by the PASSWORDS_ON_CMDs operand of the
FEATURES system configuration statement or by the SET PASSWORD
command), you cannot specify your password on the command line. You must
wait for the ENTER PASSWORD prompt before you type in the password. The
password is automatically masked, thus improving system security. If your
installation is not using the password suppression facility for the LOGON
command, you can specify your password on the command line, or you can
wait for the ENTER PASSWORD prompt before you type in the password.
5. Do not use any line-editing symbols when you enter the LOGON command
name. You can use the system default line-editing symbols when you enter
operands. However, you cannot use line-editing symbols that are defined
specifically for your virtual machine.
6. If you were disconnected from your virtual machine because of a console error,
you have an installation-defined grace period (usually up to 15 minutes) to log
on again. If you do not log on within the grace period, your virtual machine is
automatically logged off. If this happens, you may have to reconstruct files and
restart jobs that were interrupted by the error.
7. If your virtual machine is running in disconnected mode, and you enter the
LOGON command to reconnect your console, certain SET and TERMINAL
command operands are forced OFF. You can enter the QUERY SET and
QUERY TERMINAL commands to check which functions are currently active.
8. When you enter the LOGON command to reconnect to your virtual machine,
the options NOIPL, IPL, ACCOUNT, MACHINE, SECLABEL, and STORAGE
are ignored. If you enter any of these options, you receive an informational
message and the value is not changed. The console-input data line is also
ignored.
9. The NORUN option is intended when RUN is set ON for users who wish to
reconnect and get into CP READ. However, the option is always accepted with
no effect in cases other than when RUN is set ON. The option is particularly
helpful for users who need to enter CP commands and who are in full-screen
mode with no break-key and with RUN set ON. These users can power-off
their terminals to be disconnected and then reconnect using LOGON with
NORUN.
10. User IDs that are defined with the NOPASS operand are able to logon without
password authorization, unless an External Security Manager (ESM) is
installed. When an ESM is installed, password authorization may be required
despite the NOPASS operand. Refer to documentation provided by your ESM
for more information.
11. If the password suppression facility is not active for the LOGON command,
allowing passwords to be specified on the command, user logon passwords
defined in the system directory cannot be identical to any of the LOGON
command options.
12. The disconnect performed when the HERE option is specified may take
significant time to complete because of the attempt made to process the
disconnect even in the case of a hung terminal.
LOGON
13. If your installation is using an External Security Manager (ESM), passwords
may be up to 40 characters in length, depending on the ESM. If your
installation does not have an ESM, then CP will perform password validation
using the system directory, which limits the passwords to a maximum length of
8 characters.
Chapter 2. CP Commands 581