For too many years now I have been too lazy to investigate the Apache error message I get whenever I restart the service:
... waiting apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName
I finally decided to investigate it today and found this post which describes a simple fix: create /etc/apache2/conf.d/name and add the ServerName variable to it.
sudo vim /etc/apache2/conf.d/name ServerName jeppson.org
Change ServerName to be whatever you would like, and you’re good to go.