centos8.txt

dnf install openssl

sudo nano /etc/yum.repos.d/mongodb-org-4.2.repo

[mongodb-org-4.4]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.4/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.4.asc


Save the file (Ctrl+o) and exit (Ctrl+x).


sudo yum install -y mongodb-org

sudo yum install checkpolicy


sudo systemctl start mongod
sudo systemctl daemon-reload
sudo systemctl restart mongod
sudo systemctl enable mongod
sudo systemctl status mongod


=============================
mongo
use admin

db.createUser(
 {
 user: "vnapnic",
 pwd: "123456",
 roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
 }
 )

show users
quit()

===============================

sudo nano /lib/systemd/system/mongod.service

Find the following line:
Environment="OPTIONS=--f /etc/mongod.conf"

Add the --auth option as follows:
Environment="OPTIONS= --auth -f /etc/mongod.conf"

Save the file (Ctrl+o) and exit (Ctrl+x).
===================================

sudo systemctl daemon-reload
sudo systemctl restart mongod

=================================

mongo
use admin
show users

db.auth("vnapnic", "123456")

show users


================================
sudo netstat -plunt | grep mongo