MESSAGE
| DATE | 2017-01-26 |
| FROM | Ruben Safir
|
| SUBJECT | Re: [Hangout-NYLXS] coreboot and payloads
|
On Thu, Jan 26, 2017 at 11:04:13AM -0800, Rick Moen wrote:
> Quoting Ruben Safir (ruben-at-mrbrklyn.com):
>
> > no, the hardware us pulled, to my understanding.
>
> Ah, socketed BIOS ROM? That's actually very nice. I have a Lenovo T60
> of which that's not true: The BIOS chip is surface-mounted on the
> motherboard.
>
I think so
https://libreboot.org/docs/install/r400_external.html
> > > alteration of the booting kernel's bootloader parameters, and can add
> > > the word 'single', while also removing 'quiet' or any rubbish like that,
> > > that was inserted to show you soothing pictures and hide boot-process
> > > information.
> > >
> >
> > that doesn't work fwiw. single is not a grub key word.
>
> I did not _say_ 'single' is a GRUB key word. Will you pay closer
> attention, please?
>
> It's a parameter to the booting kernel, and has meaning to Linux. It
> gets passed along to PID 1, the init process, which in turn acts on that
> instruction to put you into single-user mode, which usually means a
> single /bin/sh process with root authority (and the root filesystem
> mounted read-only). (Some Linuxes do this with the root FS mounted
> read-only; some do not.) If you get that far, you are golden, because
> you can then do 'mount -o rw,remount /', mount any other filesystems you
> really need at that moment (probably none), and change the installed
> system's root-user password to whatever you want. Having done that, as
> per usual, you make sure the file cache has been flushed to disk by
> doing
>
Right, of course.
> # sync
> # sync
> # sync
>
> ...and then rebooting.
>
> This is all Linux 101, Ruben. This is the standard way of breaking into
> a system from the physical console if you presently lack the root
> password.
>
I haven't done this since lilo
> And I might add that sometimes, if some idiot has taken measures to
> try to prevent the local console user from getting to root authority,
> it's useful to pass the booting kernel 'init=/bin/sh' rather than kernel
> keyword 'single'. This instructs the booting kernel to _not_ load the
> regular PID 1 init process, but rather a single root-user /bin/sh
> process with the root filesystem mounted read-only.
>
> If you get that far, proceed as deescribed above. Again, this is
> totally Linux 101, sir.
>
>
> > Yeah - thats it. You need to declare the kernel to boot first, not
> > simple when you have no os running to do a dmesg, and then you can run a
> > nornmal live disk and do an install. bios features need to run through
> > something called nvram... something or other. When I get home I'll post
> > the exact name. Its a command line program that flips bios bits.
>
> I see you do a lot of basically pointless talking, here, but zero
> attempt to answer the implied question about whether you can get control
> of GRUB by timely pressing of a Shift key or Esc keystroke.
>
> If you can get GRUB's attention, then you can alter the booting kernel's
> command line (if some idiot hasn't forced GRUB to lock out the local
> administrator from doing so). If you can do _that_, then you can get
> single-user mode as the root use. And if you can do _that_, you can
> change the root password, and you now have total control of your system.
>
> Stop ignoring the expert trying to help you, Ruben. Answer the
> goddamned implied question, do what I suggest, and report back
> competent, precise, concise diagnostic information. OK? Stop acting
> like the flakiest and most ungrateful of novices. Sheesh. You'd think
> you were being paid to make damned sure I was unsuccessful in helping
> you gain control of your system.
>
> _______________________________________________
> hangout mailing list
> hangout-at-nylxs.com
> http://www.nylxs.com/
--
So many immigrant groups have swept through our town
that Brooklyn, like Atlantis, reaches mythological
proportions in the mind of the world - RI Safir 1998
http://www.mrbrklyn.com
DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
http://www.nylxs.com - Leadership Development in Free Software
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Being so tracked is for FARM ANIMALS and and extermination camps,
but incompatible with living as a free human being. -RI Safir 2013
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