2021 Updated! Install WordPress on Ubuntu Server with add-on features as HTTPS support, SSL certificate and HTTP2 supports

sudo apt-get install apache2 apache2-utils 
sudo systemctl enable apache2
sudo systemctl start apache2
sudo apt-get install mysql-client mysql-server
sudo apt-get install php7.4 php7.4-mysql libapache2-mod-php7.4 php7.4-cli php7.4-cgi php7.4-gd  
sudo nano  /var/www/html/info.php
This is only for info about the server configuration and settings etc, very highly recommended to remove it after the initial test.
sudo rm -rf /var/www/html/info.php
sudo a2enmod rewrite

sudo apache2ctl configtest
(You might get a "AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using Set the 'ServerName' directive globally to suppress this message")
There is an easy fix: 
sudo nano /etc/apache2/apache2.conf
Then Just add a line like this: 
This should solve the issue.

It's time to download and deploy the latest wordpress version.
wget -c http://wordpress.org/latest.tar.gz
tar -xzvf latest.tar.gz
sudo rsync -av wordpress/* /var/www/html
sudo chown -R www-data:www-data /var/www/html
sudo chmod -R 755 /var/www/html
cd /var/www/html
mysql -u root -p
CREATE USER 'dbuser'@'localhost' IDENTIFIED BY 'YourPassword';
GRANT ALL PRIVILEGES ON dbuser.* TO 'dbuser'@'localhost';

There are several methods to determine what is our current password strength, and we can make it stronger if required.
I usually use these methods:

SHOW VARIABLES LIKE 'validate_password%';
SHOW VARIABLES LIKE 'default_authentication_plugin';

then if I need to modify something here are some useful variable settings:

SET GLOBAL validate_password.LENGTH = 8;
SET GLOBAL validate_password.policy=2;
SET GLOBAL validate_password.policy=MEDIUM;
SET GLOBAL validate_password.mixed_case_count = 1;
SET GLOBAL validate_password.number_count = 1;
SET GLOBAL validate_password.special_char_count = 1;
SET GLOBAL validate_password.check_user_name = 0; 

cd /var/www/html
sudo mv wp-config-sample.php wp-config.php

In the wp-config.php we will set our own database name , username password ,and host name/address.

sudo nano wp-config.php 

sudo systemctl restart apache2.service 
sudo systemctl restart mysql.service

If we carefully followed all my steps above , you should have a running wordpress page by now.
You might need to run as the wordpress uses php file extensions.
sudo rm -rf /var/www/html/index.html

Enable HTTPS supports:

Create a ssl-params.conf file and add the following definition below to it, then save it.

$ sudo nvim /etc/apache2/conf-available/ssl-params.conf 
# Cipherli.st Strong Ciphers for Apache url: https://cipherli.st/
# Addong some Strong SSL Security on Apache2
SSLProtocol All -SSLv2 -SSLv3 -TLSv1 -TLSv1.1
SSLHonorCipherOrder On
Header always set Strict-Transport-Security "max-age=63072000; includeSubDomains; preload"
Header always set X-Frame-Options DENY
Header always set X-Content-Type-Options nosniff
# Requires Apache >= 2.4
SSLCompression off
SSLUseStapling on
SSLStaplingCache "shmcb:logs/stapling-cache(150000)"
# Requires Apache >= 2.4.11
SSLSessionTickets Off

Next thing to do is create a backup of the original default-ssl.conf file.

$ sudo cp /etc/apache2/sites-available/default-ssl.conf /etc/apache2/sites-available/default-ssl.conf.bak

Then modify it accordingly, we are deploying a wordpress site in this particular example we use the following adjustments.

ServerName lnrsoft.ddns.net
ServerAlias lnrsoft.ddns.net

Redirect permanent / https://lnrsoft.ddns.net/
DocumentRoot /var/www/html

Protocols h2 http:/1.1

<If "%{HTTP_HOST} == 'lnrsoft.ddns.net'">
    Redirect permanent / https://lnrsoft.ddns.net/

SSLEngine on
Options FollowSymLinks
AllowOverride All
Require all granted
SSLProtocol +TLSv1.2

Enable HTTP2 supports:

<VirtualHost *:443>
  ServerName lnrsoft.ddns.net
  ServerAlias lnrsoft.ddns.net

  Protocols h2 http:/1.1

  <If "%{HTTP_HOST} == 'lnrsoft.ddns.net'">
    Redirect permanent / https://lnrsoft.ddns.net/

  DirectoryIndex index.html index.php
  DocumentRoot /var/www            

  ErrorLog ${APACHE_LOG_DIR}/lnrsoft.ddns.net.log
  CustomLog ${APACHE_LOG_DIR}/lnrsoft.ddns.net-access.log combined

  SSLEngine On
  SSLCertificateFile /etc/letsencrypt/live/lnrsoft.ddns.net/cert.pem
  SSLCertificateKeyFile /etc/letsencrypt/live/lnrsoft.ddns.net/privkey.pem
  SSLCertificateChainFile /etc/letsencrypt/live/lnrsoft.ddns.net/chain.pem

  <Directory /var/www>
      Options FollowSymLinks
      AllowOverride All
      Require all granted


It is also recommended adding strong ciphers for Apache to increase SSL Security on the server.
Part of my Best Practices to deploy a secure webserver, virtual personal server or database serve is to add the recommended ciphers from SSL Server Test.

How to Enable HTTP2 in Apache 2.4 on Ubuntu

### Step 1: Upgrade Apache from PPA

sudo add-apt-repository ppa:ondrej/apache2
sudo apt update
sudo apt upgrade

### Step 2: Install the PHP FastCGI module for PHP 7.4

sudo apt install php7.4-fpm 
sudo a2enmod proxy_fcgi setenvif
sudo a2enconf php7.4-fpm 
sudo a2dismod php7.4 
sudo service apache2 restart

### Step 3: Change MPM from "prefork" to "event"

sudo a2dismod mpm_prefork 
sudo a2enmod mpm_event 
sudo service apache2 restart 
sudo service php7.4-fpm restart

### Step 4: Add a line to your Virtual Host file

Protocols h2 h2c http/1.1

### Step 5: Enable the mod_http2 Apache module

sudo a2enmod http2
sudo service apache2 restart

### Step 6: Test your Apache server for HTTP/2