httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName

Question

I tried to restart my Apache server on CentOS 5.0 and got this message:

httpd: Could not reliably determine the server\'s fully qualified domain name,

Answer 1

So while this is answered and accepted it still came up as a top search result and the answers though laid out (after lots of research) left me scratching my head and digging a lot further. So here's a quick layout of how I resolved the issue.

Assuming my server is myserver.myhome.com and my static IP address is 192.168.1.150:

1. Edit the hosts file

   $ sudo nano -w /etc/hosts
   
   127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
   
   127.0.0.1 myserver.myhome.com myserver
   
   192.168.1.150 myserver.myhome.com myserver
   
   ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
   ::1 myserver.myhome.com myserver
   

2. Edit httpd.conf

   $ sudo nano -w /etc/apache2/httpd.conf
   
   ServerName myserver.myhome.com
   

3. Edit network

   $ sudo nano -w /etc/sysconfig/network HOSTNAME=myserver.myhome.com
   

4. Verify

   $ hostname
   
   (output) myserver.myhome.com
   
   $ hostname -f
   
   (output) myserver.myhome.com
   

5. Restart Apache

   $ sudo /etc/init.d/apache2 restart
   

It appeared the difference was including myserver.myhome.com to both the 127.0.0.1 as well as the static IP address 192.168.1.150 in the hosts file. The same on Ubuntu Server and CentOS.