mongodb create databse, create admin user, create database user, create database url

mongodb commands

// After install mongo db.
// commmand to start mongodb service
mongo

// go to admin databse 
use admin

// Create the root user
db.createUser({user:"admin", pwd:"password", roles:[{role:"root", db:"admin"}]})

Exit from the MongoDB shell.

//restart and authenticate mongodb

mongo -u admin -p password --authenticationDatabase admin

// You can see the mongo connecting. Check the databases using the following command:

show dbs

// create new database

use newdatabse

// add atleast one doc to that database

db.createCollection("mycollection")
{ "ok" : 1 }

// add user to databse 

db.createUser(
{
	user: "newUser",
	pwd: "password",
	roles:[{role: "userAdmin" , db:"newdatabse"}]})

// database connection url

mongodb://newUser:password@localhost:27017/newdatabse

//when conncetion timeout use below commant 
// check services that using mongodb
ps -eaf | grep mongod

// kill server using commant
sudo kill <pId>