Today I renewed some of my SSL certificates and suddenly Apache2 was no longer starting. A
says all was fine. So I checked log files but found that there was a configuration error, which I wonder why the two different messages can happen.
As it turned out, one of the PEM files only contained DH parameters and no real certificate. After I added the cert block from a backup, the apache2 started again. After a renewing of the certificate, I can again access my SSL-secured website again (it is my personal #invidious
I wanted to share this with you, including !Friendica Admins
to save you a lot of time investigating it. So
check validity of SSL certificates but on startup of Apache2 they are being checked.