How to Install MongoDB on Ubuntu 18.04 LTS Server

This post shows users and new students that How to Install MongoDB on Ubuntu 18.04 LTS Server.

MongoDB is a cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with optional schemas. MongoDB is developed by MongoDB Inc. and licensed under the Server Side Public License.

MongoDB is already in Ubuntu default repositories however, the version in Ubuntu repositories isn’t the latest and greatest. In order to install the latest, you must install MongoDB package repository on Ubuntu, and this tutorial will show you how.

For more details about MongoDB, please check its official website.

Installation Process of MongoDB on Ubuntu

Step 1: Add MongoDB Package repository to Ubuntu

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5

Step 2: Install MongoDB on Ubuntu 18.04

sudo apt update
sudo apt install -y mongodb-org

#Step 3: Manage MongoDB

sudo systemctl stop mongod.service
sudo systemctl start mongod.service
sudo systemctl enable mongod.service

By default, MongoDB listens on port 27017. After installing, the local server should be able to communicate with MongoDB. To verify whether MongoDB is running and active, run the commands below:

sudo systemctl status mongod

After run above Commands You should see something like below:

mukesh@ubuntu1604:~$ sudo systemctl status mongod
● mongod.service - High-performance, schema-free document-oriented database
   Loaded: loaded (/lib/systemd/system/mongod.service; enabled; vendor preset: enabled)
   Active: active (running) since Sat 2020-11-04 10:23 CST; 23min ago
     Docs: https://docs.mongodb.org/manual
 Main PID: 2383 (mongod)
    Tasks: 23
   Memory: 60.7M
      CPU: 2.613s
   CGroup: /system.slice/mongod.service
           └─2383 /usr/bin/mongod --config /etc/mongod.conf

Nov 04 10:23:13 ubuntu1604 systemd[1]: Started High-performance, schema-free document-oriented database.
Nov 04 11:23:13 ubuntu1604 systemd[1]: Started High-performance, schema-free document-oriented database.

Run the commands below, to connect to MongoDB shell:

mongo --host 127.0.0.1:27017

After run above Command You should see something like below:

MongoDB shell version v3.6.2
connecting to: mongodb://127.0.0.1:27017/
MongoDB server version: 3.6.2
Welcome to the MongoDB shell.
For interactive help, type "help".
For more comprehensive documentation, see
        http://docs.mongodb.org/
Questions? Try the support group
        http://groups.google.com/group/mongodb-user
Server has startup warnings:

Step 4: Adding Admin User

For enable authentication, run the commands to create a new admin user after you’ve logged into MongoDB server.

> use admin

For create a new admin user, run the commands below:

> db.createUser({user:"admin", pwd:"new_password_here", roles:[{role:"root", db:"admin"}]})

After run above Commands you should see a successful admin user created :

Successfully added user: {
	"user" : "admin",
	"roles" : [
		{
			"role" : "root",
			"db" : "admin"
		}
	]
}

Exit and continue below to enable MongoDB logon authentication, Run the commands below to open MongoDB config file :

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

Then change the highlighted line to look like the one below and save :

[Unit]
Description=High-performance, schema-free document-oriented database
After=network.target
Documentation=https://docs.mongodb.org/manual

[Service]
User=mongodb
Group=mongodb
ExecStart=/usr/bin/mongod --auth --config /etc/mongod.conf
PIDFile=/var/run/mongodb/mongod.pid
# file size

Save and exit

Restart MongDB to make the changes apply.

sudo systemctl daemon-reload
sudo service mongod restart

Now only authetication users will be allowed to access the database server :

mongo -u admin -p new_password_here --authenticationDatabase admin

Step 5: Completely Remove MongoDB

Stop the database server

sudo systemctl stop mongod.service

Remove all packages

sudo apt purge mongodb-org*

Finally, remove MongoDB databases and log files.

sudo rm -r /var/log/mongodb
sudo rm -r /var/lib/mongodb

That’s all

If you find any error and issue in above steps , please use comment box below to report.