HP-UX System Administrator's Guide: Configuration Management

could be unpleasantly surprised at the effect of a pending change that had been
forgotten.
To find out which saved configuration is marked for use at next boot, use kconfig
-w (which). This command also identifies the saved configuration that was most recently
loaded or booted, or the system file that was most recently imported.
Modifying Saved Configurations
To modify the module state settings and tunable value settings in a saved configuration,
use the -c (configuration) option of the kcmodule and kctune commands, respectively.
Saved configurations can also be changed by changing their system file and then
importing it; see “Managing Configurations with System Files” (page 192).
Several options of kconfig allow other changes to saved configurations. The -r
(rename) option will rename a saved configuration. (The backup configuration cannot
be renamed.) The -t option will change the title on a saved configuration. The -d
(delete) option will delete a saved configuration.
If a configuration has been marked for use at next boot, and you decide you want to
continue using the currently running configuration instead, use kconfig -H (unhold)
to discard all changes being held for next boot.
Managing Configurations with System Files
Every kernel configuration has a corresponding system file. A system file is a flat text
file that describes all of the configuration settings in a compact, machine-readable,
portable format. The format of a system file is described in detail in the system(4)
manpage. It is an enhancement of the format used in previous releases of HP-UX; the
previous formats are still accepted.
Making Configuration Changes with System Files
System files provide an alternate mechanism for kernel configuration, because
configuration changes can be made by editing a system file and then telling the kernel
configuration tools to apply the changes. This is the kernel configuration method most
familiar to users of older versions of HP-UX.
To make configuration changes using a system file, start with the system file
corresponding to the configuration you want to change.
2
The system automatically
maintains system files for each configuration. The system file for the currently running
configuration is located at /stand/system. The system file for any saved configuration
is located at /stand/configname/system. If you want to create a new system file
for a configuration, use the kconfig -e (export) command. This command takes two
forms:
• Export the running configuration:
2. You will be asked to confirm your changes if the system file comes from a different configuration from
the one you’re changing, or if it’s out of date with respect to the configuration you’re changing.
192 Configuring the Kernel