Ubuntu Apache Error: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1

Today, I will let you know example of apache2: could not reliably determine the server's fully qualified domain name. I’m going to show you about using 127.0.1.1. set the 'servername' ubuntu 21. We will look at example of apache2: could not reliably determine the server's fully qualified domain name. I explained simply step by step using 127.0.1.1. set the 'servername' dir.

A Few days ago i installed apache2 in my ubuntu 21. I simply restart apache using apache command then i found following error:

"apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1. Set the 'ServerName'"

If you want to resolve that issue then follow below commands:

First, you have to open "apache2.conf" and add "ServerName localhost" line in bottom. so let's open file by bellow command:

sudo nano /etc/apache2/apache2.conf

Add below line on that file:

ServerName localhost

Now, just reload apache2.

sudo systemctl reload apache2

Now, It will works.

I hope it can help you...