mxlinux install mongodb issue: unrecognized service how to resolve

If you follow mongodb installation instruction,  https://docs.mongodb.com/manual/tutorial/install-mongodb-on-debian/, will find error when trying to start the service.  

That's because mx linux uses SysV init instead of systemd, but the apt installation didn't include a SysV script.

How to fix:

The init script could be downloaded from https://github.com/mongodb/mongo/blob/master/debian/init.d

Save it as  /etc/init.d/mongod

Restart computer

$ sudo service mongod start

test launching succesful

$ sudo service mongod status

connect to the local mongodb server

$ mongosh