How to set up users in mongodb

To set up a MongoDB user, follow these steps: 1. Connect to the server and create an administrator user. 2. Create a database to grant users access. 3. Use the createUser command to create a user and specify their role and database access rights. 4. Use the getUsers command to check the created user. 5. Optionally set other permissions or grant users permissions to a specific collection.

How to set up a MongoDB user

MongoDB is a NoSQL database system that uses role-based access control (RBAC) to manage access to data. To set up a MongoDB user, follow these steps:

1. Connect to the MongoDB server using <code>mongo</code> shell

 <code>mongo</code>

2. Create an administrator user

If the administrator user has not been created yet, create it with the following command:

 <code>use admin db.createUser( { user: "admin", pwd: "password", roles: [ { role: "root", db: "admin" } ] } )</code>

3. Create a database

To create a database that users can access, use the following command:

 <code>use mydb db.createCollection("mycollection")</code>

4. Create a database user

To create a database user, use the following command:

 <code>db.createUser( { user: "mydbuser", pwd: "password", roles: [ { role: "readWrite", db: "mydb" } ] } )</code>

This command adds a user named "mydbuser" to the database "mydb", which has read and write permissions.

5. Check the user

To check the created user, use the following command:

 <code>db.getUsers()</code>

6. Set other permissions (optional)

In addition to basic read and write permissions, other permissions can be set, such as:

• dbAdmin : Allows the creation and management of databases.
• clusterAdmin : Allows management of the entire cluster.

To set additional permissions, modify the role field in the roles array.

7. Grant user permissions (optional)

To grant users permissions to a specific collection, use the following command:

 <code>db.collection.grantRolesForUser( "mydbuser", [ { role: "find", db: "mydb" } ] )</code>

This command grants the "mydbuser" user the search permission for the "collection" collection in the "mydb" database.

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