1 mongo # connects to mongodb://127.0.0.1:27017 by default
2 mongo --host <host> --port <port> -u <user> -p <pwd> # omit the password if you want a prompt
3 mongo "mongodb://192.168.1.1:27017"
4 mongo "mongodb+srv://cluster-name.abcde.mongodb.net/<dbname>" --username <username> # MongoDB Atlas