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3.4 Use of signals

A running dirmngr may be controlled by signals, i.e. using the kill command to send a signal to the process.

Here is a list of supported signals:

SIGHUP
This signal flushes all internally cached CRLs as well as any cached certificates. Then the certificate cache is reinitialized as on startup. Options are re-read from the configuration file. Instead of sending this signal it is better to use
          gpgconf --reload dirmngr

SIGTERM
Shuts down the process but waits until all current requests are fulfilled. If the process has received 3 of these signals and requests are still pending, a shutdown is forced. You may also use
          gpgconf --kill dirmngr

instead of this signal

SIGINT
Shuts down the process immediately.
SIGUSR1
This prints some caching statistics to the log file.