How do I update Apache2 on Ubuntu 18.04?

When upgrading your Apache2 web server on Ubuntu 18.04 you will want to add the ppa:ondrej/apache2 repository. To get Apache2 updated, enter the following commands:

sudo add-apt-repository ppa:ondrej/apache2

Then run the updates.

sudo apt update

Then install the most recent version of Apache2.

sudo apt install apache2

This should get your Apache2 fully updated.