There are several reasons why you might want to run different Apache Virtual Hosts as separate users from the Apache user account. My most frequent usage is on my development machine to allow running from my home directory. The most commonly recommended option for this purpose is MPM-ITK (a quick hack would be to add yourself to the www-data group using “sudo usermod -a -G www-data USERNAME”) sudo apt-get install apache2-mpm-itk<br></br>sudo a2enmod mpm_itk

My normal combination on the big-server side would be Apache + MySQL (or PostgreSQL), but on the RPi this seems to be absolute overkill. For data-logging operations I would not use the local system anyway (looking at MQTT as well as Remote MongoDB datastore via REST Webservices). After some poking around and reading up on the options I decided to go for the following combo: LightHTTPD + SQLite. Both are lightweight replacement of their fully-featured big-server counterparts (Apache HTTP & MySQL) and have very familiar configurations.