Certificate with letsencrypt

Install certbot

 yum install certbot.noarch

stop httpd if running

 service httpd stop

create certificate valid for www.itbetrieb.de and itbeetrieb.de

 [root@??? ~]# certbot certonly --standalone -d itbetrieb.de -d www.itbetrieb.de

find certificates and keys in

 [root@h1826968 itbetrieb.de]# pwd
 /etc/letsencrypt/live/itbetrieb.de
 [root@??? itbetrieb.de]# ll
 insgesamt 0
 lrwxrwxrwx 1 root root 36  5. Jun 16:30 cert.pem -> ../../archive/itbetrieb.de/cert1.pem
 lrwxrwxrwx 1 root root 37  5. Jun 16:30 chain.pem -> ../../archive/itbetrieb.de/chain1.pem
 lrwxrwxrwx 1 root root 41  5. Jun 16:30 fullchain.pem -> ../../archive/itbetrieb.de/fullchain1.pem
 lrwxrwxrwx 1 root root 39  5. Jun 16:30 privkey.pem -> ../../archive/itbetrieb.de/privkey1.pem

edit

[root@h1826968 conf.d]# ll /etc/httpd/conf.d/ssl.conf
-rw-r--r-- 1 root root 9726  5. Jun 16:34 /etc/httpd/conf.d/ssl.conf

Update Certificate:

systemctl stop httpd
certbot renew
systemctl start httpd