C:\Program Files\MongoDB\Server\4.4\bin>mongo MongoDB shell version v4.4.1 connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb Implicit session: session { "id" : UUID("7aa2a8eb-097a-4433-a348-314868079dff") } MongoDB server version: 4.4.1 --- The server generated these startup warnings when booting: 2020-09-21T16:38:42.622+08:00: ***** SERVER RESTARTED ***** 2020-09-21T16:38:43.487+08:00: Access control is not enabled for the database. Read and write access to data and configuration is unrestricted --- --- Enable MongoDB's free cloud-based monitoring service, which will then receive and display metrics about your deployment (disk utilization, CPU, operation statistics, etc). The monitoring data will be available on a MongoDB website with a unique URL accessible to you and anyone you share the URL with. MongoDB may use this information to make product improvements and to suggest MongoDB products and deployment options to you. To enable free monitoring, run the following command: db.enableFreeMonitoring() To permanently disable this reminder, run the following command: db.disableFreeMonitoring() --- > db test > 2 + 2 4 > show dbs admin 0.000GB config 0.000GB local 0.000GB