Update README.md

README.md

@@ -26,6 +26,13 @@ There is no need to configure users or anything else than internet access and wh
 
 All programs including these can be found in the ```progs.csv```.
 
+## Preparation
+A bootable base installation of Arch Linux is needed.
+You can find a guide on how to get a encrypted Arch Linux with LVM installed on my [website](https://wiki.martenkante.eu/#arch/installation.md).
+Please only follow the guide until creating a second user.
+You don't need an existing user other than root to use larbs.
+A seperate user will be created during the installation progress.
+
 ## Installation
 ```
 curl -LO https://raw.githubusercontent.com/tiynger/larbs/master/larbs.sh