On a running Atomic system that you can boot into, you have two options for rollback. By default, atomic keeps the previously booted os tree; it will be available as a secondary bootloader entry. The first option is, while on a physical console, hold down shift to access the syslinux boot menu. While logged into a running system, atomic rollback will swap the bootloader order to the previous tree. The second option is, while logged into a running system, type atomic rollback which will swap the bootloader order to the previous tree.

There may be a time when you have an issue with the Atomic host and need to enter rescue mode to fix an issue. In this article, we will explore how to do just that.

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