That came later, though. Assuming re-purposing of an existing signal, SIGHUP was a smart choice because it&#x27;s exactly the one that a daemon (not attached to a terminal) will never ‘legitimately’ see.<p>I don&#x27;t know the history of SIGHUP-to-reload (perhaps a good question for TUHS) but I&#x27;d guess it originated outside of Bell or Berkeley, who would have simply added a new signal.