Q: os x server how to stop websites through terminal

command

launchctl unload -w /System/Library/LaunchDaemons/org.apache.httpd.plist 

doesn't work

I get error: /System/Library/LaunchDaemons/org.apache.httpd.plist: Could not find specified service

Service is not started???

when I run

launchctl load -w /System/Library/LaunchDaemons/org.apache.httpd.plist

and then

launchctl unload -w /System/Library/LaunchDaemons/org.apache.httpd.plist

I don't get error

OK, but after unload command or "apachectl stop" websites are still working

"killall httpd" works, but service restarts automatically during short time

OS X El Capitan