MongoDB

wikipedia:MongoDB (Feb 2009, trends) is an open-source document-oriented database using a JSON-like documents with schema. Listen by default on port TCP 27017.

Features

Connect to mongoDB: mongo or mongo --host IP_TO_CONNECT
List databases: show dbs or show databases
Connect to a database: use <your_db_name>
Backup your_db_name database to a file (--archive): mongodump --archive=test.20150715.archive --db your_db_name
Backup database to binary JSON (BSON) files (--out): mongodump --host mongodb1.example.net --port 37017 --username user --password "pass" --out /opt/backup/mongodump-2011-10-24
mongod --smallfiles --oplogSize 128 --replSet rs0 --storageEngine=mmapv1
mongod --smallfiles --oplogSize 128 --replSet rs0 --storageEngine=mmapv1 --bind_ip_all
db.myCollection.find() or db.myCollection.find().pretty()
show tables, show collections
db.users.find({"name": /.*m.*/}) or db.users.find({"name": /m/})
db.YOUR_COLLETION.find().sort({_id:1}).limit(50);
mongo --eval "printjson(db.serverStatus())"