It seems you executed the correct command but, for some reason, you don't have the
ctlscript.sh in the right place. Could please you execute the following commands in order to see how is your file structure? If you want, share the output of the commands:
ls -la /opt/bitnami/
sudo find /opt/bitnami/ -name "ctlscript.sh"
sudo grep -iR "only root execution" /opt/bitnami/
If there is anything you didn’t fully understand, please don’t hesitate to ask us again. We’ll be more than happy to help you.
Hope it helps.