:: Re: [DNG] upcoming usr merge requir…
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Skribent: tito
Dato:  
Til: dng
Emne: Re: [DNG] upcoming usr merge requirements
On Tue, 28 Nov 2023 18:19:05 -0600
o1bigtenor via Dng <dng@???> wrote:

> On Tue, Nov 28, 2023 at 12:48 PM Didier Kryn <kryn@???> wrote:
> >
> > Le 28/11/2023 à 03:43, Steve Litt a écrit :
> >
> > I'm speaking for Linux, not for the Debian or Devuan packaging...
> >
> > If you choose to have your /usr on a separate partition mounting on
> > mountpoint /usr, it should be no problem at all because your initramfs
> > will boot off its own OS, and then mount /dev/sda5 /usr, and then
> > pivotroot back to the hard disk, which now has /usr mounted in the
> > correct place. No big deal: It's been done for years: Long before
> > usrmerge.
> >
> > Now of course if a specific distro's packaging system and installer has
> > a problem with such a setup, you'll need to do some DIY on that distro.
> > But I doubt even Debian is stupid enough to seriously bork this
> > customary technique.
> >
> >     It's exactly that.

> >
> >     My own comment is: it is only if you decide to tweak the boot sequence that you need to take care.

> >
> >     The boot sequence is nowadays done in two steps:

> >
> >     1) boot into a first partition which, for distros, is always an initramfs; perform some mounts and maybe other things;

> >
> >     2) pivot-root to the final partition and continue the init sequence there.

> >
> >     Note that, if you decide to craft your own first step, the initial partition is not necessarily an initramfs, provided your kernel is able to mount it, i.e. it has the drivers built-in, which implies you must build it from source.

> >
> Hmmmmmmmmmmm - - - - thank you!
>
> How do I slowly step through my boot sequence to see what's happening?
>
> (I'm running from SSDs and trying to follow the boot sequence on the
> screen - - -
> I bet I miss at least 70% of it and maybe more even though I read
> very very quickly.)
>
> TIA

Hi,
you can use:
dmesg
+
bootlogd - record boot messages
The default logfile is /var/log/boot.

Ciao,
Tito
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