The error message:
server: no process found
should be self-explanatory. You're trying to kill a process that is not running.
That's because the Apache2 server daemon process is not called
server. It's called
The command you are using will only kill the
server binary that you wrote in Problem Set 6.
The correct command to kill a zombie Apache2 process is:
sudo killall -9 apache2
Also (as @DinoCoderSaurus always reminds me) you may be viewing an old website from your browser's cache. Try using Ctrl+F5 to force the browser to bypass the cache and reload the page over the network.
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