I want to change the mongodb database directory. Some says that I need to change the owner of the new directory to the username that is running mongodb

https://stackoverflow.com/questions/5798549/why-cant-i-start-the-mongodb

How do I know which user is running the mongodb service?

Well I suppose I just look at all the processes and see who own those processes.

How do I see the running processes.

I run the answer and get this. Looks like the user is mongodb. Not ubuntu, not root, but mongodb

root@ip-10-138-30-205:/media/newdrive# ps aux | grep mongodb

mongodb  17140  0.3  5.2 131484 31832 ?        Ssl  11:35   0:00 /usr/bin/mongod --config /etc/mongodb.conf                                                                                                                      

root     17154  0.0  0.1   8096   936 pts/0    S+   11:38   0:00 grep --color=auto mongodb