You work as a Network Administrator for World Perfect Inc. The company has a Linux-based network. You have configured a Linux Web server on the network. A user complains that the Web server is not…

The killall command sends a signal (SIGTERM by default) to every process whose name matches the argument, so killall httpd will terminate all running HTTPD instances simultaneously. This resolves the issue of multiple HTTPD processes without requiring the administrator to find and kill each PID individually.

endall is not a valid Linux command; executing it would result in a 'command not found' error.

kill requires a numeric process ID (PID) as its argument, not a process name; passing a name like 'httpd' directly will fail or produce an error.

end is not a valid Linux command; it does not exist in standard Linux distributions.