Re: [gentoo-user] Problems setting up sshd on an installation kernel

[Alan Mackenzie <acm@muc.de>]

Hi, Joshua,

On Sun, Dec 06, 2009 at 01:56:06PM -0500, Joshua Murphy wrote:
> On Sun, Dec 6, 2009 at 11:59 AM, Florian Philipp
> <lists@f_philipp.fastmail.net> wrote:
> > Alan Mackenzie schrieb:

> >> I'm trying to get sshd working on an embryonic Gentoo installation on my
> >> laptop.  The reason is that I want to ssh from my nice comfy desktop
> >> system into this laptop to do the rest of the installation stuff.

> >> The installation kernel with which I'm having problems is:
> >> Linux livecd 2.6.30-gentoo-r8 #1 SMP Tue Nov 3 11:40:51 UTC 2009.

> >> Having started sshd on my laptop, when I do

> >>     ssh -lroot 192.168.2.101

> >> from my desktop, I get prompted for my ssh key's pass phrase, which I
> >> enter.  Thereafter, nothing happens, and it continues to happen for a
> >> long, long time.

> > [...]

> >> Clearly openpty (a C function) is failing to find some file.  Don't you
> >> just love error messages like "No such file or directory" which forget
> >> to identify the filename?  I'm guessing that the file it can't find is
> >> the device file for the new pty.

> >> Is there anything I can do to get sshd working from this kernel (and if
> >> so, what?), or is there something fundamentally wrong with the kernel
> >> configuration?


> > Where did you start sshd, in the chrooted environment or on the live cd
> > itself?

> My first thought as well... I'd guess, just at a glance, that sshd was
> started in the chroot, and that /mnt/gentoo/dev/ is bind mounted
> properly, but /mnt/gentoo/dev/pts/ isn't.

It was, and it is, but it isn't, just as you suggest.  I've just read up
on exactly what

    mount -o bind /dev /mnt/gentoo/dev

means, and I can see I really want "-o rbind" (or --rbind) instead.

Thanks!  It'll surely work, now

> Joshua M. Murphy

-- 
Alan Mackenzie (Nuremberg, Germany).