USB booting :: How to halt without doing backup

Great! I can now boot from a USB memory key. I love the way that files are restored from the key during boot, and saved back to the key as a backup file during shutdown.

However sometimes I screw up completely, and I just want to shutdown without doing the backup. Pulling the plug (which I've not tried yet) seems too brutal.

How can I exit without doing the backup?

Clear the file /opt/.backup_device
From the prompt you can type
$ > /opt/.backup_device

But then don't forget to select the backup device after a reboot or you won't get your backups anymore.

original here.