How to Fix Apache Configuration Error AH00558: Could not reliably determine the server's fully qualified domain name

Not the biggest Apache fan here, but today working on a server while setting up Apache as a reverse proxy for the JBoss application, after trying to restart the apache service I faced the following issue Apache Configuration Error AH00558: Could not reliably determine the server's fully qualified domain name.

Luckily, a quick Google helped to find the solution:

Long story short (For Debian / Ubuntu)

sudo nano /etc/apache2/apache2.conf

Add a line containing ServerName 127.0.0.1 to the end of the file

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