I'm a student at the university of KULeuven and I'm currently investigating the options to perform root operations in web servers which don't run as root.I already found a lot of solutions (running a daemon etc). For security reasons you don't want to run your webserver as root, but as a user like www-nginx with limited permissions. However, ISPconfig 3 must perform certain root actions to reload the server config at certain stages. But I was curious: What does ISPconfig 3 uses for this matter? Responses can be very technically, I even would happy if they would go in detail.