Create root user for DB
mongo > use admin > db.createUser({user:"admin", pwd:"admin123", roles:[{role:"root", db:"admin"}]}) vi /lib/systemd/system/mongod.service
ExecStart=/usr/bin/mongod --auth --config /etc/mongod.confsystemctl daemon-reload
// restart Mongod service mongod restart
Connect to DB
mongo -u admin -p admin123 --authenticationDatabase admin
Performance Monitor
mongostat mongotop