How to change the upload_max_size for moodle in Ubuntu 22.04.2 LTS?

The documentation on that Moodle site is out of date by a decade or so. In order to change the maximum upload size on an Ubuntu 22.04 system running Apache and PHP 8.1, you will want to do this:

0. Connect to your server

1. Edit the php.ini file for your version of PHP:

   sudo {editor of choice} /etc/php/8.1/apache2/php.ini
   

   ^{Note 1: Be sure to replace {editor of choice} with your editor of choice.
   Note 2: If you are not using PHP 8.1, be sure to replace 8.1 with the version your system is using.}

2. Locate the line that reads upload_max_filesize and change the limit to something that makes sense for your installation:

   upload_max_filesize = 64M
   

   Optional:

   If people will regularly be uploading many files at the same time, consider increasing the max_file_uploads value as well.

3. Given the way Moodle is designed, it may also be useful to increase the maximum size for POST requests:

   post_max_size = 16M
   

   ^{Note: This will depend on how your students are using Moodle. Generally 16~32M is sufficient to handle anything that most plugins will expect.}

4. Increase the memory_limit to also handle some of the less-efficient modules/plugins that are available for Moodle:

   memory_limit = 256M
   

   ^{Note: Generally 256M is sufficient for most Moodle installations. Some may require 384M if there is a remarkable amount of server-side processing going on with each HTTP request.}

5. Save the php.ini file

6. Restart Apache:

   sudo service apache2 restart
   

7. Test your Moodle installation