Installation to Raspberry Pi

In order to have GPhoto2Server running on Raspberry Pi one has to first install GPhoto2 onto Pi, optionally make Pi provide own WiFi etc. Here's the complete instruction for everything:

• Install latest Raspbian (Jessie) onto SD card See https://www.raspberrypi.org/documentation/installation/installing-images/ Do all the usual configs after installation (run raspi-config and do expand filesystem, change hostname/password if you wish, etc).
• If you want Raspberry Pi to provide WiFi (which you probably do want in order to use GPhoto2Server outdoors, and not carry around some sort of battery powered WiFi router) - use Adafruit instructions on how to do that: https://learn.adafruit.com/setting-up-a-raspberry-pi-as-a-wifi-access-point/overview This step is a bit hard though, and you need to have a good WiFi dongle (one that supports infrastructure mode). Thus if it is not entirely necessary - skip it. Or you can do this after other steps - it does not necessarily have to be done as step 2.
• On your Raspberry Pi run gphoto2-updater in order to have latest libgphoto2 installed: https://github.com/gonzalo/gphoto2-updater#how-to-use
• Download latest GPhoto2Server release (currently it's 1.2 - https://github.com/mvmn/gp2srv/releases/download/1.2/gp2srv-1.2.zip ) onto your Raspberry Pi. Unzip it.
• When you need to use GPhoto2Server - plug your camera into Raspberry Pi via USB (before starting GPhoto2Server) and execute this command in terminal in folder to which you have unzipped gp2srv-<version>.zip in order to start GPhoto2Server:

java -jar GPhoto2Server-<version>.jar

or just run run.sh shell script (which will contain same java -jar GPhoto2Server-<version>.jar command anyway)

• Connect to same network where Raspberry Pi is (WiFi or whatever you have), and in a web browser open URL http://<your Raspberry Pi IP address or hostname.local>:8080

There you should have GPhoto2Server working.