Problem restarting Apache

I have just installed lamp stack on centos, according to the tutorials on DO. Now when I give the command "sudo service httpd restart " it gives the following message " Stopping httpd: [ OK ] Starting httpd: httpd: apr_sockaddr_info_get() failed for cent httpd: Could not reliably determine the server’s fully qualified domain name, using for ServerName "

BUT when i go to the ip address or the it show that apache is installed and even the info.php file which i have created for testing purpose is also being showed in both the IP and

Can someone please explain me this message. I am using linux for the first time.

Thanks for the help in advance.

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@hypertextsol, <br> <br>Do as @Alex recommended; then, make sure your hostname is correctly listed in <strong>/etc/hostname</strong>.

You either need to configure DNS correctly, or put your hostname into /etc/hosts. It’s not a fatal error, but it does betray poor attention to configuration details. <br> <br>

This is the content in /etc/hosts <br> localhost localhost.localdomain localhost4 localhost4.localdomain4 <br>::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 <br> <br>