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On a supported openSUSE setup, Snapper can help recover the root system from a bootable Btrfs snapshot: boot the snapshot, check that it works, run sudo snapper rollback, then reboot. That documented capability is not proof that a particular system was deliberately damaged and recovered, so this guide explains the recovery path and its prerequisites without claiming a test result.
What Snapper recovery does
Snapper manages filesystem snapshots. In openSUSE’s documented setup, snapshots can help undo package or administration changes and, when the system meets the requirements, provide a prior root state to boot and roll back to. The rollback operation resets the system to the selected snapshot state; it is different from restoring only chosen files.
Snapshots are useful for local recovery, but they are stored on the same partition or subvolume as their source. They therefore are not a separate backup if that storage device fails.
How to boot and roll back to a snapshot
- Open the bootloader’s snapshot option. On the documented Tumbleweed path, select “Start bootloader from a read-only snapshot.” Menu wording and availability can vary with the openSUSE release and boot setup.
- Choose a recovery snapshot and boot it. The snapshot boot is read-only. Use it to inspect the system and determine whether the recovered state is usable; booting it for inspection does not itself make it the new default.
- Confirm the recovery from the booted system. If the snapshot is the state you want to keep, run
sudo snapper rollback. - Reboot. The rollback sets the recovered snapshot as the new default boot option. Confirm the system starts in that state.
The Leap 15.6 documentation describes the same broad sequence: boot a bootable snapshot, inspect the system, run sudo snapper rollback, and reboot. Consult the documentation for the exact release installed, since the available menu and configuration can differ. openSUSE Leap 15.6: System Recovery and Snapshot Management; openSUSE Tumbleweed: System Recovery and Snapshot Management.
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When bootable rollback is available
For Leap 15.6, the documented requirements include a Btrfs root filesystem on one device, an installed bootloader capable of booting the system, and the default root subvolume arrangement. The bootable snapshots are those created for Snapper’s default root configuration. As the Leap guide puts it, “Only snapshots created for the default Snapper configuration (root) are bootable.” These are release-specific documented requirements, not a guarantee for every openSUSE installation or custom filesystem layout. Leap 15.6 bootable snapshot requirements.
What a root rollback does not restore
A root rollback covers the contents of /, not every location or every kind of data. In the Leap 15.6 layout, some paths are excluded from snapshots. The documentation lists bootloader configuration directories, /srv, and /opt; it also describes /home as excluded when it is not on a separate partition. The precise exclusions depend on release and layout, so check the matching documentation before relying on rollback to restore an application or file.
Because a snapshot boot mounts included parts read-only, it is primarily an inspection and recovery route, not a writable continuation of the old system. Snapper also warns that snapshot creation does not ensure consistency for files being written at that moment; take care when restoring data or files that may have been changing during snapshot creation. Leap 15.6 snapshot exclusions.
Undo selected changes or roll back the root?
| Approach | What it is for | Key distinction |
|---|---|---|
| Compare snapshots and restore selected files | Recover chosen changes without resetting the entire root state | Selective restoration; check the affected files and consistency needs. |
Boot a snapshot, then run sudo snapper rollback |
Return the supported root system to the snapshot state | Root-level rollback; it does not restore excluded paths or all data outside /. |
The Leap guide documents both comparing snapshots to restore selected files and rolling the system back to a snapshot. Snapper’s normal setup can create paired pre- and post-snapshots around YaST and Zypper operations, which can help identify changes associated with those operations. openSUSE Leap 15.6 snapshot management.
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- openSUSE is a Linux-based operating system for your PC, Laptop or Server. You can surf the Web, manage your e-mails and photos, do office work, play videos or music and have a lot of fun!
- You can surf the Web, manage your e-mails and photos, do office work, play videos or music and have a lot of fun!
How to prepare without mistaking snapshots for backups
- Check the documentation for the exact openSUSE release and confirm the root filesystem, subvolume arrangement, bootloader, and Snapper configuration.
- Know where important data lives and which paths your root snapshots exclude.
- Keep a separate copy of important files on another storage device. This addresses the same-device limitation; it is not a Snapper feature or a substitute for checking what your backup contains.
- Before a real recovery, identify the snapshot you intend to use and inspect it through the documented boot path where possible.
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