Citadel OS is the operating system of Umbrel Bitcoin and Lightning node. It's based on Raspberry Pi OS (formerly Raspbian) and uses pi-gen for customization.
Config variables
The config file has system defaults which are used when building the image and for automated builds.
-
CITADEL_VERSION- To install the specific Citadel version. -
GITHUB_USERNAME- To automatically login to your node without typing a password. -
CITADEL_REPO- A custom git repo used to download Citadel.CITADEL_VERSIONis ignored if this is set, but it is required to also setCITADEL_BRANCH. -
CITADEL_BRANCH- The git branch or commit SHA in the custom repo that should be checked out.
Other pi-gen-related stuff can be found in pi-gen's documentation which is still applicable.
Citadel is still in an early stage and things are expected to break every now and then. We DO NOT recommend running it on mainnet with real money just yet, unless you want to be really #reckless.
Citadel OS is licensed under the GNU Affero General Public License v3.0 or later.
It includes code from umbrel-os and pi-gen, which are
Copyright (c) 2015 Raspberry Pi (Trading) Ltd.
Copyright (c) 2020 Umbrel. https://getumbrel.com/
"Being open source means anyone can independently review the code. If it was closed source, nobody could verify the security. I think it's essential for a program of this nature to be open source." — Satoshi Nakamoto