You may get the error when restarting apache.

# service httpd restart
Stopping httpd: [ OK ]
Starting httpd: httpd: apr_sockaddr_info_get() failed for XXXXX
httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName

It is because of the apache variable ServerName has not been set.

In CentOS, you can do the changes as below.

# vi /etc/httpd/conf/httpd.conf

Press “/” and type “ServerName” and then press Enter to find the string “ServerName”

You may find the following line

#ServerName www.example.com:80

Add a line as below or change the line to the following

ServerName yourdomain.com

Press “ESC” and press “:” and type “wq” and then press Enter to save it

Restart the apache again!

# service httpd restart
Stopping httpd:                                            [  OK  ]
Starting httpd:                                            [  OK  ]

 

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