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

sudo nano /etc/apache2/apache2.conf

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

/etc/apache2/apache2.conf`

Include the virtual host configurations:

IncludeOptional sites-enabled/*.conf

vim: syntax=apache ts=4 sw=4 sts=4 sr noet

**ServerName 127.0.0.1`**