We have a requirement to replace the existing certificate and also install the recent patch of content server in our content server which based on linux and the database is MAXDB. However Database server is different one and is based on unix. So we have following the steps below. Installing the patch on Unix:Log on to the Unix system as the Content Server Administrator.Unpack the files to a temporary directory.Stop the Apache Web Server with the command apachectl stop. You will find this command in the directory bin of the server installation.For Apache 1.3: Replace the Shared Libraries in the directory libexec of your Content Server/Cache Server installation against the files from the ZIP archive.For Apache 2.0 and higher: Replace the Shared Libraries in the directory modules of your Content Server/Cache Server installation against the files from the ZIP archive.Check the execution rights of the program files. Some UNIX variants require execution rights to be set for shared libraries. The relevant command is chmod755 .Start the Apache Web Server with the command apachectl start.Now in course of the following the steps above we were supposed to stop the Apache webservice using apachectl stopHowever immediately after giving the command we are getting the below error message. httpd: Could not reliably determine the server's fully qualified domain name, using server's fqdn for ServerNamehttpd (no pid file) not runningAs a part of investigation we checked the below location to confirm whether the server name is mentioned there or not. /app/apache/vvzcs/conf/httpd.confServer name is maintained there. Can anyone kindly suggest please we have a long pending defect which needs to be fixed. This issue popped additional guest. 
httpd: Could not reliably determine the server's fully qualified domain name
apache httpd;hostname