I'm using this tut as a base: https://www.howtoforge.com/tutorial...8-4-jessie-apache-bind-dovecot-ispconfig-3-1/ additionally I need PHP 5.5 of which I found 5.5.38 to be the latest. I then followed this tutorial to add it as fastcgi and FPM: https://www.howtoforge.com/how-to-u...pm-and-fastcgi-with-ispconfig-3-debian-wheezy but that tutorial is for Debian 7 and PHP 5.3 so I have some doubts about its accuracy. Later on I found this tutorial: https://www.howtoforge.com/tutorial/how-to-install-php-5-6-on-ubuntu-16-04/ but it deals with PHP 5.6 and Ubuntu. My questions are as follows: - I compiled PHP 5.5 wit hthe instructions for 5.3 any problems with this? - I also noticed that PHP 5.5 should come with OPCache, can I just add "--enable-opcache" to the instructions for PHP 5.3 and that's it? - I also noticed when switching a site in ISPCFG3 from fastcgi to my manually compiled PHP 5.5 as FPM there's a problem until I manually start it with /etc/init.d/php-5.5.38-fpm start and I see the 2 tuts above have different approaches one using a init script one a service file, can someone clarify what the correct approach is using the linked perfect server tutorial above?