Starting MongoDB

Once you have the MongoDB packages installed, the next thing you should do is see whether you can start and connect the MongoDB server from your terminal. So, let's begin:  

1. Start MongoDB manually or automatically at boot time in the following commands:

$ sudo systemctl start mongod
$ sudo systemctl enable mongod

2. Verify it by checking its version:

$ mongo --version

You should get a similar output to this on your terminal:

MongoDB shell version v4.2.1
git version: edf6d45851c0b9ee15548f0f847df141764a317e
OpenSSL version: OpenSSL 1.1.1d 10 Sep 2019
allocator: tcmalloc
modules: none
build environment:
    distmod: ubuntu1804
    distarch: x86_64
    target_arch: x86_64

3. Optionally, check the MongoDB server status with the following command:

$ sudo service mongod status

You should get the similar output to this on your terminal:

● mongod.service - MongoDB Database Server
   Loaded: loaded (/lib/systemd/system/mongod.service; enabled;
     vendor preset...