Create a MongoDB user from commandline

Question

I have set up a MongoDB database with an admin user that has only administrative rights, not read or write access to databases.

What I now would want to do

Answer 1

Solved it by putting the commands

use dummydb
db.addUser('dummyuser', 'dummysecret')

into a .js file, and then ran MongoDB by calling:

$ mongo admin -u admin -p admin < setupMongoDB.js

That's it :-)