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