and thank you for the help.
I need nginx to run, so dissabling it is not an option. The site will be a proxy server running GLYPE. So I will set it up and forget about it.
If you want to save me time researching, could yopu plese rephrase this and tell me the file that I need to edit when you say "have a look in the sites-enabled vhost folder and remove the symlink for 000-ispconfig.vhost."?
Besides the symlinks, isn't there a way to have ispconfig3 inactive and NOT loaded? ANd whenever I need it I could run something like "ispconfig3 start"?
Yes, I will look to optimize ubuntu, nginx etc. I just started from what is obvious to me.
Trying the stuff you showed me for memory right now.