MongoDB database details (1). mongodb details

MongoDB database details (1). mongodb details

MongoDB> port 27017

I. What is Nosql (object-oriented storage-key and value)

Ii. CognitionMongoDB (json storage)

 

How to Create a mongodb database with a user name and password

I'm so angry. Let's just put it down. Below is a part of my notes on mongodb.
By default, mongoDB user authentication is disabled.
Modify the/etc/cmdd. conf file. By default, any client in mongoDB can connect to port 27017 without authentication. By default, there is no administrator account. By modifying this configuration file, you can change it to permission authentication during login.
If you want to create a user for a database in mongoDB, you must first enter the database and then use the addUser command. You can also set the user to read-only (db. addUser ("jack", "jack", true), and the third parameter to indicate whether the user is a "read-only user ").

To use a super administrator, you must first connect to the admin database and log on to the administrator account, and then connect to other databases to exercise administrator privileges.

User information storage and authentication process

Similarly, MySQL saves system user information in the mysql. user table. MongoDB also saves the username and pwd of the system user in the admin. system. users collection. Pwd = md5 (username + ": mongo:" + real_password ). This is not a problem. Username And: mongo: It is equivalent to adding a salt value to the original password. Even if attackers obtain the md5 hash stored in the database, they cannot simply find the original password from the rainbow table.

Common permission management commands

1. # enter the database admin

Use admin

2. # Add or modify user passwords

Db. addUser ('name', 'pwd ')

3. # view the user list

Db. system. users. find ()

4. # User Authentication

Db. auth ('name', 'pwd ')
If this one returns 1, the authentication is successful. Only after the authentication is successful can the database be operated.

5. # delete a user

Db. removeUser ('name ')

6. # view all users

Show users

7. # view all databases

Show dbs

8. # view all collections

Show collections

9. # view the status of each collection

Db. printCollectionStats ()

10. # view master-slave replication status

Db. printReplicationInfo ()

The company is preparing to use the mongodb database. I have checked a lot of information about mongodb usage problems and the mongodb cost problems.

Mongodb is free of charge