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This article is to share with you about the basic operating commands and statements of mongodb. The editor thought it was very practical, so I shared it with you as a reference. Let's follow the editor and have a look.

To log in to the test library for the first time, you need to switch the admin library and create a user

1. Two kinds of mongo authentication login 1. Similar to mysql authentication login mongo-- host 10.10.10.5-u "testuser"-- authenticationDatabase "admin"-pendant 123456'

Login result

MongoDB shell version v4.0.4connecting to: mongodb://127.0.0.1:27017Implicit session: session {"id": UUID ("a8c4b96d-0b8d-469c-9d6c-7c0bcb38161b")} MongoDB server version: 4.0.42, authentication after login mongoMongoDB shell version v4.0.4connecting to: mongodb://127.0.0.1:27017Implicit session: session {"id": UUID ("88d434a3-a436-4189-929b-5b70f11248db")} MongoDB server version: 4.0.4 >

Toggle admin library

> use adminswitched to db admin > db.auth ("testuser", "123456") 1 II. Create library, view library 1, create database > use testdb # create testdb library switched to db testdb2, view current library > dbtestdb 3, view all libraries > show dbsadmin 0.000GBconfig 0.000GBlocal 0.000GBtestdb 0.000GB

# 4. View the current database user permissions

> show users {"_ id": "admin.testuser", "user": "testuser", "db": "admin", "roles": [{"role": "root", "db": "admin"}], "mechanisms": ["SCRAM-SHA-1" "SCRAM-SHA-256"]} III. Detailed explanation of permission roles.

Create a user to assign permissions 1. Create a super user

In the admin library, create a testuser user, set the password to 123456 and the permission to root

> db.createUser ({user:'testuser',pwd:'123456', roles: [{role:'root', db:'admin'}]}) Successfully added user: {"user": "testuser", "roles": [{"role": "root", "db": "admin"}]} 2. Create ordinary users

In the testdb library, create a testuser user, set the password to 123456 and the permission to dbOwner

> use testdbswitched to db testdb > db.createUser ({user:'testuser',pwd:'123456', roles: [{role:'dbOwner', db:'testdb'}]}) Successfully added user: {"user": "testuser", "roles": [{"role": "dbOwner", "db": "testdb"}]} V. Change password, permissions, etc. 1. Change password

Change the testuser user password to abc123

Method 1 > db.changeUserPassword ("testuser", "abc123") method 2 > db.updateUser ("testuser", {pwd: "abc123"}) 2, modify permission 1 > add permission > db.grantRolesToUser ("testuser", [{role: "readWrite", db: "testdb"}, {role: "read", db: "testdb"}]) 2 > delete permission > db.revokeRolesFromUser ("testuser", [{role: "readWrite", db: "testdb"]) 3 > modify permission > db.updateUser ("testuser") {roles: [{role: "read", db: "admin"}]})

On the basic operation of mongodb commands and statements to share here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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