There is a great tutorial on installing Apache, MySQL, PHP on www.digitalocean.com. Below I propose a fast-forward guide.

• 1. Open a terminal. Right click on your desktop, and click Open in terminal. If on server version of Ubuntu just go to the next step.
• 2. Type the following command and hit ENTER to download package information from all configured sources. You may skip this step if recently done it.

  $ sudo apt update

• 3. Type the following command and hit ENTER to install PHP.

  $ sudo apt install -y php libapache2-mod-php php-mysql

• 4. Now, for Prvstorage app to work properly, you need to make sure the following php modules are installed: bcmath | ctype | fileinfo | json | mbstring | openssl | pdo | tokenizer | xml | gd |
  Type the following command and hit ENTER to check what php modules are installed.

  $ php -m

  For each module that is missing type the following command and hit ENTER to install it.

  $ sudo apt install -y php-bcmath php-mbstring php-xml php-zip

  On my test server I needed to install: bcmath | mbstring | xml | gd . The others were already installed.
• 5. Now we need to edit php.ini configuration file, to better serve our purpose.
  Php.ini configuration file location: /etc/php/X.X/apache2
  , where X.X is the version of installed PHP. To find your version, type in terminal the following command.

  $ php -v

  On my test server location was: /etc/php/8.1/apache2
  Type the fallowing command and hit Enter to edit php.ini configuration file:

  $ sudo nano /etc/php/8.1/apache2/php.ini

  Locate these configuration lines:

  .....
  post_max_size = 8M -> set this to '0', with no 'M', 'G' or whatever. .....
  upload_max_filesize = 2M -> for instance, you can change this to '2G' for 2 Gigabyte files.
  

• 7. The final touch, type the following command and hit ENTER to activate Ubuntu firewall.

  $ sudo ufw enable

• 8. Type the following command and hit ENTER to check firewall status.

  $ sudo ufw status