Can't create backup mongodump with --db. Authentication failed

Question

When I create backup of all databases in MongoDB (version 3):

mongodump --username bacUser --password 12345

It\'s OK. But when I try to cre

Answer 1

mongodump   --authenticationDatabase admin -uroot -pyourpassword

here root is username and yourpassword is your password.

This command will backup/dump all database back-up in current directory.