I have installed canvas LMS with the help of bitnami VM.
When I stop the service I got the message like
sudo /opt/bitnami/ctlscript.sh stop
/opt/bitnami/apache2/scripts/ctl.sh : httpd stopped
Stopping canvas_init daemon, it could take some seconds...
/opt/bitnami/apps/canvaslms/scripts/ctl.sh : canvas_init stopped
Could not connect to Redis at 127.0.0.1:6379: Connection refused
/opt/bitnami/redis/scripts/ctl.sh : redis could not be stopped
waiting for server to shut down.... done
/opt/bitnami/postgresql/scripts/ctl.sh : postgresql stopped