Short story: I placed a single line,
into the previously empty file /boot/loader.conf and now my machine boots with an
extremely limited read-only volume.
How do I get my old boot behavior back?
Long story: I was muddling through updating the kernel and world for the first time,
going from FreeBSD 5.1 => 5.2. Following instructions in /usr/src/UPDATING I made
backups, made buildworld, etc. until it got to the point where it says reboot in
Never having done that, I tried first by "reboot"ing, but for some reason my USB
keyboard doesn't get power until further on in the boot cycle, so I couldn't just
"press 4." I looked through the docs and found instruction saying that I should set
boot_single. I'm guessing I should have set it to something other than "", which is
just copied from /boot/defaults/loader.conf.
So, a couple more questions: what is this limited read-only mode exactly? Where are my
files (e.g. /usr is empty)? What should I have done? Is it possible to back out?
It's a personal sandbox, and everything I need is already safely backed up; if I need
to just blast the whole system with a CD install, I can do that. But I am curious to
know if it's possible to u-turn in this cul-de-sac. Apparently, I know just enough to
get myself into trouble, but not enough to get out.
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