Another Escape Route Test

Not that long ago I got to thinking about just one of the old portable computers I have lying around. My old MacBook Air, bought not that long before a trip from a store selling used computers as well as new machines, had been a thoroughly portable machine. However, it only had four gigabytes of RAM with no way to increase that. This made me refrain from upgrading it to the final operating system versions it could support, even if the absolute final version among them has passed over the “no security updates” horizon. At last, the thought of installing a version of Linux on it occurred to me, and perhaps just before the latest burst of general lugubriousness over perceptions of rotten software from Apple. (Many years ago, during a previous burst, I set up an even older black-plastic MacBook to dual-boot into Linux, so I suppose that setting up just-in-case escape routes has been something I’ve been proving I can do for a while.)
( Booting and rebooting )