Merge pull request #4108 from aktarus82/patch-1

Update debian.rst, enable autostart of ZM at boot

docs/installationguide/debian.rst

@@ -102,6 +102,7 @@ To make sure zoneminder can read the configuration file, run the following comma
  sudo systemctl reload apache2.service
  sudo systemctl restart zoneminder.service
  sudo systemctl status zoneminder.service
+ sudo systemctl enable zoneminder.service # start zoneminder automatically at boot
 
 If the zoneminder.service show to be active and without any errors, you should be able to access zoneminder at ``http://yourhostname/zm``