Installing Certbot

In short, to install Certbot on CentOS 7, run the following commands:

 yum -y install snapd ; systemctl enable --now snapd.socket ; ln -s /var/lib/snapd/snap /snap
 snap install core; snap refresh core ; snap install --classic certbot ; ln -s /snap/bin/certbot /usr/bin/certbot

If you want to use Certbot from within the Admin/Theme page, you need to follow the installation instruction about Apache Integration on https://www.mirtapbx.com/manual/index.php/Themes