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Manual Rollbacks
When an update is complete, the previous OS deployment remains on disk. If an update causes issues, you can use it as a fallback. This is a manual operation that requires human intervention and console access.
Temporary rollback
To temporarily boot the previous OS deployment, hold down `Shift` during the OS boot process. When the bootloader menu appears, select the relevant OS entry in the menu.
Permanent rollback
To permanently revert to the previous OS deployment, log into the target node, and run `rpm-ostree rollback -r`. This operation marks the previous OS deployment as the default, and immediately reboots into it.