Zend Optimizer installation [3/4]

Then click 'YES' for the Apache server.
The next option is the full path for the apache control utility. By default it is : '/usr/sbin/apachectl' , but it can be on other place.
To find it you can use 'which' command on other console opened to the same server.

When you have the right location write it to the Zend Optimizer Installation