[otrs] How to stop notifications ?

Hi, everyone is here is receiving notifications from our test-system and i dont know exactly how to stop it... I searched the documentation and found this : Use $OTRS_HOME/bin/Cron.sh {start|stop|restart} to start or stop this cronjobs from $OTRS_HOME/var/cron/* (.dist will be ignored). How does this work ? Cron.sh tells me : Run this script just as OTRS user! Or use 'Cron.sh {start|stop|restart} OTRS_USER'! Thanks to everyone answering my dumb questions :) mfg Dennis