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Boot usb

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  Boot usb Gunnar Gervin <dofeelok@gmail.com> - 2021-07-14 03:20 +0200
    Re: Boot usb Celejar <celejar@gmail.com> - 2021-07-14 03:40 +0200
    Re: Boot usb Keith Bainbridge <keithrboz@gmail.com> - 2021-07-14 04:00 +0200
      Re: Boot usb Greg Wooledge <greg@wooledge.org> - 2021-07-14 04:10 +0200
        Re: Boot usb Gunnar Gervin <dofeelok@gmail.com> - 2021-07-14 04:20 +0200
    Re: Boot usb "Thomas Schmitt" <scdbackup@gmx.net> - 2021-07-14 09:20 +0200

#237341 — Boot usb

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Hi.
I have burned iso image to usb but it is unmounted.
Thus can probably not be booted(?)
Tried mount sdb; sudo mount /dev/sdb & also sudo mount /dev/sdb1
But Terminal said "Cannot find in /etc/fstab" in both tries.
Gunnar

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#237343

On Wed, 14 Jul 2021 04:14:41 +0300
Gunnar Gervin <dofeelok@gmail.com> wrote:

> Hi.
> I have burned iso image to usb but it is unmounted.
> Thus can probably not be booted(?)

No - whether or not it is currently mounted (or mountable at all,
in /etc/fstab, etc.) makes no difference as to whether it will
successfully boot. 

> Tried mount sdb; sudo mount /dev/sdb & also sudo mount /dev/sdb1
> But Terminal said "Cannot find in /etc/fstab" in both tries.

Did you try just booting from the device (first making sure, of course,
that the system BIOS / UEFI is configured to boot from the USB device
in question)?

Celejar

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#237344

Good Morning Gunnar

The boot command requires a mount point, but I'm never sure how to do 
this well outside of file manager

In any case, if you're confident that the USB was correctly written, 
just try booting to it

All the best


Keith Bainbridge

keithrbaugroups@gmail.com



On 7/14/21 11:14, Gunnar Gervin wrote:
> Hi.
> I have burned iso image to usb but it is unmounted.
> Thus can probably not be booted(?)
> Tried mount sdb; sudo mount /dev/sdb & also sudo mount /dev/sdb1
> But Terminal said "Cannot find in /etc/fstab" in both tries.
> Gunnar

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#237345

On Wed, Jul 14, 2021 at 11:37:47AM +1000, Keith Bainbridge wrote:
> The boot command requires a mount point,

... huh?

This makes no sense.  There is no "boot command", and there is no need
to mount a USB device to which you have written a Debian installer ISO
image.  In fact, mounting at any point during this process is bad.

All you need to do is follow the instructions in the release notes.
"Burn" (copy) the ISO image to the USB device, without ever mounting it.
Then tell your computer's firmware/BIOS to boot the USB device, possibly
selecting either UEFI or Legacy mode as appropriate.  That's it.

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#237346

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Hm.
Tried press option key
But usb does not show in screen
And when in grub wrote
boot=/dev/sdb
a ? mark came on screen, which only came up black with blinker up in left
corner... & nothing else.
Nope Youtube did not solve it..
Debian live again, soon, or else how reset back to start...
Gunnar
PS
Gene med not vaccine who care

On Wed, 14 Jul 2021, 05:00 Greg Wooledge, <greg@wooledge.org> wrote:

> On Wed, Jul 14, 2021 at 11:37:47AM +1000, Keith Bainbridge wrote:
> > The boot command requires a mount point,
>
> ... huh?
>
> This makes no sense.  There is no "boot command", and there is no need
> to mount a USB device to which you have written a Debian installer ISO
> image.  In fact, mounting at any point during this process is bad.
>
> All you need to do is follow the instructions in the release notes.
> "Burn" (copy) the ISO image to the USB device, without ever mounting it.
> Then tell your computer's firmware/BIOS to boot the USB device, possibly
> selecting either UEFI or Legacy mode as appropriate.  That's it.
>
>

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#237355

Hi,

maybe the USB stick mounts automagically if you just plug it out after
copying the ISO and then plug it in again.
(I personally dislike this automount feature.)


Gunnar Gervin wrote:
> I have burned iso image to usb but it is unmounted.

Do you mean that it cannot be mounted ?

It must not be mounted during the copy procedure. Afterwards it should be
mountable by the base device and also by some of its partitions.
In case of amd64 ISO the partition 1 points to the ISO filesystem and
partition 2 points to the FAT filesystem of the EFI System Partition.


> Tried mount sdb; sudo mount /dev/sdb & also sudo mount /dev/sdb1
> But Terminal said "Cannot find in /etc/fstab" in both tries.

This message comes if you omit the name of the mount directory and the
device is not listed in fstab where the system could find the directory
name.

This fails for me:

  $ sudo mount /dev/sdc
  mount: can't find /dev/sdc in /etc/fstab

This succeeds:

  $ mount /dev/sdc /mnt/iso
  mount: /dev/sdc is write-protected, mounting read-only

The message about "write-protected" is normal. It just means that Linux
has no driver for write operations in ISO 9660 filesystems. That's ok,
because booting a Debian ISO needs only readability of the filesystem.

You need an existing directory for the role of "/mnt/iso". It should be
empty. I made my "/mnt/iso" by

  $ mkdir /mnt/iso

although this is quite oldfashioned. Meanwhile the mount points of
removable media have different names (for the bleeping automats).
Whatever, any directory will do. Just don't use one with important files
in it, because they will be hidden while the directory is used as mount
point.


Have a nice day :)

Thomas

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