Open the file and locate the entry PidFile . Another way is to use the ps and grep utilities. You are looking for the parent process. If you run your server as root, you will easily locate it since it belongs to root. You will see many httpd executables running on your system, but you should never need to send signals to any of them except the parent, whose pid is in the PidFile .
Some folks prefer to specify signals using numerical values, rather than using symbols.
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