Most of the OS based on Linux kernel comes already with Apache2 service preinstalled but if you don't have the preinstalled follow my blog with Step-1 otherwise follow it from Step-2.

Step-1: Installing the Apache2 service

Command:- sudo apt-get install apache2

Note- I have installed it already on my machine.

Step-2: Enabling the Apache2 service

Command:- sudo service apache2 start

Step-3: Know your machine's IP

Command:- ifconfig

Note- If network tools aren't installed to your device. Do it by the following commands- sudo apt-get install ifconfig

Step-4: Open your browser & enter your machine IP

You will get a screen like this.

Step-5: Enabling firewalls and configuring it so that local devices connected in network can see it on port 80.

Commands:-

(i) sudo ufw enable

(ii) sudo ufw allow 'Apache'

(iii)sudo ufw allow from 192.168.0.0/24 to any port 80

(iv)sudo ufw default deny incoming

(v)sudo ufw status

Congratulations!!! now you can access the Apache2 web server from your local connected device.

Step-6: - Now make a directory in /var/www/html/ location and enjoy file sharing.