Turn your Raspberry Pi into a NAS with Samba

DON'T Install PLEX on a Raspberry Pi, but here's instructions anyways...

Open VPN on Raspberry Pi: Installation & Debugging Instructions

Install NGINX on Raspberry PI

How to Install PHP on Raspberry Pi with NGINX

Raspberry Pi Monitoring with EZ Server Monitor

Stress Testing on the Raspberry Pi with Sysbench

Install and Configure Gollum Wiki on Raspberry Pi

How to Install a Proxy on Raspberry Pi using Tinyproxy

How to Install Raspotify on a Raspberry Pi

The ULTIMATE Raspberry Pi Homeserver Starter Guide