How do you change MongoDB user permissions?

Question

For instance, if I have this user:

> db.system.users.find()
{ \"user\" : \"testAdmin\", \"pwd\" : \"[some hash]\", \"roles\" : [ \"clusterAdmin\" ], \"otherDB         


        

Answer 1

If you want to just update Role of User. You can do in the following way

db.updateUser( "userName",
               {

                 roles : [
                           { role : "dbAdmin", db : "dbName"  },
                           { role : "readWrite", db : "dbName"  }
                         ]
                }
             )

Note:- This will override only roles for that user.