First of all we need a SSH Access to our Website or Server.

In this case we will use letsencrypt to get a free certificate on a Apache2 Webserver running on Debian.

All we need is the package certbot and snapd

apt-get update && apt-get upgrade
apt-get install snapd certbot python3-certbot-apache

/// installing of snapd
snap install core

/// install and configure certbot
certbot --apache

Answer the questions:

1. enter a valid emailadress for urgent renewal
2. accrept the Terms of Service
3. is optional, but i u want to support the guys give them a yes.
4. Which names would you like to activate https? -> let it empty and hit enter for all

Now we need a crontab to renew our certificate

crontab -e


// File:
# m h  dom mon dow   command
* * 1 1,4,7,10 * certbot renew