Note that this is a cheatsheet and not a replacement for the official documentation:
OStree is how the root filesystem is managed in Universal Blue images. It can have multiple deployments including 1 active deployment and 1 or more standby or rollback deployments.
Managing ostree
Update ostree
Pull updated version based on your current upstream repository.
rpm-ostree upgrade
Note: Using the
ublue updatecommand includes this step.
Roll back deployment
This will change your next target boot to the previous deployment. Use this if you have issues with your current booted deployment.
rpm-ostree rollback
Add rpm package
Install a new package layered on top of the file system tree.
Add --now to layer on top of the active tree.
rpm-ostree install $PACKAGE
Get ostree status
See the current booted file system tree and any layered packages.
rpm-ostree status
Note: This is very handy when getting help and reporting issues!
Pin a file system tree
To pin your current file system use 0 and for the previous booted file system use 1.
This will keep a deployment available so it is not garbage collected.
Useful for major version changes and kernel changes.
sudo ostree admin pin 0
Original Docs and Cheatsheet: Justin Garrison and Erwan Le Floch