This is a legacy script. Modern application should use the per component global configuration files under ‘/etc/gnupg/’.
This script is a wrapper around gpgconf to run it with the command --apply-defaults for all real users with an existing GnuPG home directory. Admins might want to use this script to update he GnuPG configuration files for all users after ‘/etc/gnupg/gpgconf.conf’ has been changed. This allows enforcing certain policies for all users. Note, that this is not a bulletproof way to force a user to use certain options. A user may always directly edit the configuration files and bypass gpgconf.
applygnupgdefaults is invoked by root as: