Like all DIY bitcoin rpc password they make assumptions about things and are subject to external libraries and software being updated or changed. I periodically test and update these steps for changes or additions, but I can’t guarantee that some troubleshooting won’t be needed to get your node up and running.
PRELIMINARIES This tutorial is to install Bitcoin Core v0. Options are given to install the GUI and wallet or not. If you wish to run a testnet node, the testnet blockchain is only around 8GB so keeping that on a 16GB microSD card with the OS will work well. ASSEMBLY How to assemble your Raspberry Pi will depend on the case purchased.