On 2021-02-08 00:40, Marco Möller wrote:
You could bypass any password request during boot to the console and
then fix it by setting the desired password newly. The boot parameter
for bypassing all password request an right away becoming logged in as
user root is:
init=/sbin/sulogin --force
That is interesting. But, how does the reader *use* that information.
STFW 'site:debian.org boot parameters buster', I see:
https://www.debian.org/releases/buster/arm64/ch05s03.en.html
Skimming the page, I do not see any instructions for entering boot
parameters...
Following the link 'Linux BootPrompt HOWTO':
https://tldp.org/HOWTO/BootPrompt-HOWTO.html
SSL problems. Try another site:
http://linuxdocs.org/HOWTOs/BootPrompt-HOWTO.html
I see LILO. Wow. Remember LILO and the 90's?
STFW 'linux boot prompt', I see:
https://www.linuxquestions.org/questions/linux-newbie-8/linux-boot-prompt-4175659396/
The answer by djk44883 provides a link to the GRUB manual:
https://www.gnu.org/software/grub/manual/grub/grub.html
'5.3.2 GNU/Linux' looks relevant:
https://www.gnu.org/software/grub/manual/grub/grub.html#GNU_002fLinux
But nothing tells me how to get to the 'grub>' prompt...
Booting a Stretch system, I see a menu:
GNU GRUB version 2.02~beta3-5+deb9u2
*Debian GNU/Linux
Advanced options for Debian GNU/Linux
Use the ? and ? keys to select which entry is highlighted.
Press enter to boot the selected OS, 'e' to edit the commands before
booting, or 'c' for a command line
If I press 'e', it (GRUB?) appears to bring up an editor window that
contains a bunch of content that looks relevant. The last few lines are:
....
echo 'Loading Linux 4.9.0-9-amd64 ...'
linux /vmlinuz-4.9.0-9-amd64 root=UUID=... ro noresume
echo 'Loading initial ramdisk ...'
initrd /initrd.img-4.9.0-9-amd64
If I press 'c', I obtain a prompt:
grub>
Do I add 'init=/sbin/sulogin --force' in the editor? Why no 'set'?
Where is this documented?
David
