Create a SSL Certificate on Ubuntu
Published:
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sudo a2enmod ssl
sudo service apache2 restart
sudo mkdir /etc/apache2/ssl
sudo nano /etc/apache2/sites-available/default
ServerName example.com:443
SSLEngine on
SSLCertificateFile /etc/apache2/ssl/apache.crt
SSLCertificateKeyFile /etc/apache2/ssl/apache.key
sudo a2ensite default
sudo service apache2 reload
source: digitalocean