A few minutes later I get:apache2.service - The Apache WebserverLoaded: loaded (/usr/lib/systemd/system/apache2.service; enabled)Active: failed (Result: exit-code) since Wed 2018-10-03 15:10:27 PDT; 38s agoProcess: 5147 ExecStop=/usr/sbin/start_apache2 -DSYSTEMD -DFOREGROUND -k graceful-stop (code=exited, status=0/SUCCESS)Process: 5140 ExecStart=/usr/sbin/start_apache2 -DSYSTEMD -DFOREGROUND -k start (code=exited, status=1/FAILURE)Main PID: 5140 (code=exited, status=1/FAILURE)This after I tracked down some port interference.