Installing mongodb on linux

sudo apt-get install mongodb-server

mkdir -p mongodb/db1
mongod --port 27017 --dbpath /home/pi/mongodb/db1

Connecting to db:

mongo --port 27017

Creating admin user:

use admin
db.addUser(
  {
    user: "root",
    pwd: "abc123",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
)

use admin
db.grantRolesToUser(
  "myUserAdmin",
  [ { role: "userAdminAnyDatabase", db: "admin" }, 
    { role: "dbAdminAnyDatabase", db: "admin" }, 
    { role: "readWriteAnyDatabase", db: "admin" } ]
)