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7.4.1 Invoking gpgconf

One of the following commands must be given:

--list-components
List all components. This is the default command used if none is specified.
--check-programs
List all available backend programs and test whether they are runnable.
--list-options component
List all options of the component component.
--change-options component
Change the options of the component component.
--apply-defaults
Update all configuration files with values taken from the global configuration file (usually /etc/gnupg/gpgconf.conf).
--list-config [filename]
List the global configuration file in a colon separated format. If filename is given, check that file instead.
--check-config [filename]
Run a syntax check on the global configuration file. If filename is given, check that file instead.

The following options may be used:

-v
--verbose
Outputs additional information while running. Specifically, this extends numerical field values by human-readable descriptions.
-r
--runtime
Only used together with --change-options. If one of the modified options can be changed in a running daemon process, signal the running daemon to ask it to reparse its configuration file after changing.

This means that the changes will take effect at run-time, as far as this is possible. Otherwise, they will take effect at the next start of the respective backend programs.