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no, in general you need to send a signal (sighup) to the daemon to reload its config or you need to restart it. If you changed systemd config files you need to reload that too.
It is all.
Most services recognize this signal – which can be sent using the kill command with appropriate command-line parameters – as an indication that they should re-examine their configuration. They do not "monitor" those files to detect changes.
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Does auditd require a system reboot to activate?
