Mastering Fedora Silverblue: Your Guide to Rebase to Fedora Linux 44

Fedora Silverblue is a desktop operating system built on Fedora Linux, designed for daily use, development, and container workflows. It offers atomic updates, making it easy to roll back if issues arise. If you're ready to upgrade to Fedora Linux 44, this Q&A covers everything from preparation to execution and recovery. Let's dive in.

1. What is Fedora Silverblue and why would you rebase to Fedora Linux 44?

Fedora Silverblue is an immutable desktop OS that uses the rpm-ostree technology, allowing you to manage system updates as atomic image-based deployments. Unlike traditional package managers, Silverblue ensures your system remains consistent and easy to revert. Rebasing to Fedora Linux 44 means switching your system's base image to the latest Fedora release, gaining new features, security updates, and performance improvements. The process is designed to be safe—if something goes wrong, you can roll back to the previous version. This guide will show you both the GUI and terminal methods, so you can choose what fits your workflow.

2. How do you prepare your existing system before rebasing?

Before rebasing, it's crucial to apply all pending updates. Open a terminal and run:

$ rpm-ostree update

Alternatively, you can use GNOME Software to install updates and reboot. This ensures your current deployment is stable and reduces the risk of conflicts during rebase. Remember, rpm-ostree is the underlying atomic technology used by all Fedora Atomic Desktops (like Kinoite). After updating, your system is ready for the next step, whether you choose the graphical or command-line route.

3. How do you rebase to Fedora Linux 44 using GNOME Software?

If you prefer a visual interface, GNOME Software notifies you when a new Fedora version is available on the Updates screen. Simply click Download to fetch the new image—this may take a while depending on your internet speed. Once downloaded, the button changes to Restart & Upgrade. Click it, and your system will automatically reboot and apply the new Fedora Linux 44 deployment. After restarting, you'll be running the latest release. It's that easy! If you ever need to undo this, refer to the rollback instructions.

4. How do you rebase using the terminal?

For those comfortable on the command line, start by verifying the 44 branch is available:

$ ostree remote refs fedora

Look for fedora:fedora/44/x86_64/silverblue in the output. If you want to pin your current deployment (so it remains in the GRUB menu until manually removed), pin it using:

$ sudo ostree admin pin 0

Replace 0 with the deployment number from rpm-ostree status. To unpin later, use sudo ostree admin pin --unpin 2 (adjust number). Then rebase with:

$ rpm-ostree rebase fedora:fedora/44/x86_64/silverblue

Finally, reboot. Your system will boot into Fedora Linux 44. If you encounter problems, follow the rollback procedure.

5. How can you pin or unpin deployments during the rebase process?

Pinning a deployment ensures it stays available as a boot option in GRUB, even after you upgrade. To pin the current one, first check its position with rpm-ostree status. The number on the left (0, 1, 2…) is the index. Then run:

$ sudo ostree admin pin 0

This prevents automatic removal of that deployment. To later unpin a deployment (e.g., number 2), use:

$ sudo ostree admin pin --unpin 2

Pinning is optional but useful if you want to keep a fallback for testing purposes. After rebase, you can manage pinned entries as needed.

6. How do you roll back if something goes wrong after rebasing?

If Fedora Linux 44 fails to boot or you experience issues, rolling back is straightforward. At boot time, look for the GRUB menu (press ESC if it doesn't appear automatically) and select the entry for the previous version. Your system will start normally. To make the old version the default again, run:

$ rpm-ostree rollback

This command switches the active deployment to the previous one and marks it as permanent. You can repeat the process if you want to revert again. This atomic rollback capability is one of Silverblue's key advantages, giving you peace of mind when upgrading.