Hi

I've downloaded 2023-10-10-raspios-bookworm-armhf.img.xz, used unxz to
extract the .img file, and I'm trying to mount it so I can have a look
at some of the files in it. I was trying to avoid having to write the
image to an SD card.

$ file 2023-10-10-raspios-bookworm-armhf.img
2023-10-10-raspios-bookworm-armhf.img: DOS/MBR boot sector; partition 1 : ID=0xc, start-CHS (0x40,0,1), end-CHS (0x3ff,3,32), startsector 8192, 1048576 sectors; partition 2 : ID=0x83, start-CHS (0x3ff,3,32), end-CHS (0x3ff,3,32), startsector 1056768, 9297920 sectors

$ sudo losetup -f --show 2023-10-10-raspios-bookworm-armhf.img
/dev/loop0

$ sudo mount -t auto /dev/loop0 /mnt/image/
mount: /mnt/image: wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error.

I thought these image files were supposed to contain mountable
filesystems, and I'm (almost) sure I've done this before with raspbian
and Ubuntu images --- am I doing something wrong above?

--
Civilization is a race between catastrophe and education.
---H G Wells

Adam Funk <a24061@ducksburg.com> wrote:
> Hi
>
> I've downloaded 2023-10-10-raspios-bookworm-armhf.img.xz, used unxz to
> extract the .img file, and I'm trying to mount it so I can have a look
> at some of the files in it. I was trying to avoid having to write the
> image to an SD card.
>
> $ file 2023-10-10-raspios-bookworm-armhf.img
> 2023-10-10-raspios-bookworm-armhf.img: DOS/MBR boot sector; partition 1 : ID=0xc, start-CHS (0x40,0,1), end-CHS (0x3ff,3,32), startsector 8192, 1048576 sectors; partition 2 : ID=0x83, start-CHS (0x3ff,3,32), end-CHS (0x3ff,3,32), startsector 1056768, 9297920 sectors
>
> $ sudo losetup -f --show 2023-10-10-raspios-bookworm-armhf.img
> /dev/loop0
>
> $ sudo mount -t auto /dev/loop0 /mnt/image/
> mount: /mnt/image: wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error.
>
> I thought these image files were supposed to contain mountable
> filesystems, and I'm (almost) sure I've done this before with raspbian
> and Ubuntu images --- am I doing something wrong above?

The image file has multiple partitions, so you need to mount the partitions
within the image, not the raw image itself. You either need:

$ sudo losetup -f -P --show 2023-10-10-raspios-bookworm-armhf.img

and you'll get devices per partition: /dev/loop0p1, loop0p2, etc

or, on an existing loopback device,

$ sudo partprobe /dev/loop0

and it'll create the partition devices.
Then you can mount them:

$ sudo mkdir -p /mnt/boot /mnt/root
$ sudo mount /dev/loop0p1 /mnt/boot
$ sudo mount /dev/loop0p2 /mnt/root

Theo

On 2023-10-18, Theo wrote:

> Adam Funk <a24061@ducksburg.com> wrote:
>> Hi
>>
>> I've downloaded 2023-10-10-raspios-bookworm-armhf.img.xz, used unxz to
>> extract the .img file, and I'm trying to mount it so I can have a look
>> at some of the files in it. I was trying to avoid having to write the
>> image to an SD card.
>>
>> $ file 2023-10-10-raspios-bookworm-armhf.img
>> 2023-10-10-raspios-bookworm-armhf.img: DOS/MBR boot sector; partition 1 : ID=0xc, start-CHS (0x40,0,1), end-CHS (0x3ff,3,32), startsector 8192, 1048576 sectors; partition 2 : ID=0x83, start-CHS (0x3ff,3,32), end-CHS (0x3ff,3,32), startsector 1056768, 9297920 sectors
>>
>> $ sudo losetup -f --show 2023-10-10-raspios-bookworm-armhf.img
>> /dev/loop0
>>
>> $ sudo mount -t auto /dev/loop0 /mnt/image/
>> mount: /mnt/image: wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error.
>>
>> I thought these image files were supposed to contain mountable
>> filesystems, and I'm (almost) sure I've done this before with raspbian
>> and Ubuntu images --- am I doing something wrong above?
>
> The image file has multiple partitions, so you need to mount the partitions
> within the image, not the raw image itself. You either need:
>
> $ sudo losetup -f -P --show 2023-10-10-raspios-bookworm-armhf.img
>
> and you'll get devices per partition: /dev/loop0p1, loop0p2, etc
>
> or, on an existing loopback device,
>
> $ sudo partprobe /dev/loop0
>
> and it'll create the partition devices.
> Then you can mount them:
>
> $ sudo mkdir -p /mnt/boot /mnt/root
> $ sudo mount /dev/loop0p1 /mnt/boot
> $ sudo mount /dev/loop0p2 /mnt/root

Brilliant, thanks very much!

--
The internet is quite simply a glorious place. Where else can you find
bootlegged music and films, questionable women, deep seated xenophobia
and amusing cats all together in the same place? ---Tom Belshaw

On 2023-10-18, Adam Funk <a24061@ducksburg.com> wrote:

> The internet is quite simply a glorious place. Where else can you find
> bootlegged music and films, questionable women, deep seated xenophobia
> and amusing cats all together in the same place? ---Tom Belshaw

Nice .sig. See below for my version.

--
/~\ Charlie Gibbs | The Internet is like a big city:
\ / <cgibbs@kltpzyxm.invalid> | it has plenty of bright lights and
X I'm really at ac.dekanfrus | excitement, but also dark alleys
/ \ if you read it the right way. | down which the unwary get mugged.

On 2023-10-18, Charlie Gibbs wrote:

> On 2023-10-18, Adam Funk <a24061@ducksburg.com> wrote:
>
>> The internet is quite simply a glorious place. Where else can you find
>> bootlegged music and films, questionable women, deep seated xenophobia
>> and amusing cats all together in the same place? ---Tom Belshaw
>
> Nice .sig. See below for my version.
>
> --
> /~\ Charlie Gibbs | The Internet is like a big city:
> \ / <cgibbs@kltpzyxm.invalid> | it has plenty of bright lights and
> X I'm really at ac.dekanfrus | excitement, but also dark alleys
> / \ if you read it the right way. | down which the unwary get mugged.

Thanks. Can I add yours to my file, and should I attribute it to you?

--
Well, I sort of don’t trust anybody who doesn’t like
Led Zeppelin. (Jack White)

On 2023-10-19, Adam Funk <a24061@ducksburg.com> wrote:

> On 2023-10-18, Charlie Gibbs wrote:
>
>> On 2023-10-18, Adam Funk <a24061@ducksburg.com> wrote:
>>
>>> The internet is quite simply a glorious place. Where else can you find
>>> bootlegged music and films, questionable women, deep seated xenophobia
>>> and amusing cats all together in the same place? ---Tom Belshaw
>>
>> Nice .sig. See below for my version.
>>
>> --
>> /~\ Charlie Gibbs | The Internet is like a big city:
>> \ / <cgibbs@kltpzyxm.invalid> | it has plenty of bright lights and
>> X I'm really at ac.dekanfrus | excitement, but also dark alleys
>> / \ if you read it the right way. | down which the unwary get mugged.
>
> Thanks. Can I add yours to my file, and should I attribute it to you?

Sure, as long as the attribution is kept.

--
/~\ Charlie Gibbs | Microsoft is a dictatorship.
\ / <cgibbs@kltpzyxm.invalid> | Apple is a cult.
X I'm really at ac.dekanfrus | Linux is anarchy.
/ \ if you read it the right way. | Pick your poison.

On 2023-10-19, Charlie Gibbs wrote:

> On 2023-10-19, Adam Funk <a24061@ducksburg.com> wrote:
>
>> On 2023-10-18, Charlie Gibbs wrote:
>>
>>> On 2023-10-18, Adam Funk <a24061@ducksburg.com> wrote:
>>>
>>>> The internet is quite simply a glorious place. Where else can you find
>>>> bootlegged music and films, questionable women, deep seated xenophobia
>>>> and amusing cats all together in the same place? ---Tom Belshaw
>>>
>>> Nice .sig. See below for my version.
>>>
>>> --
>>> /~\ Charlie Gibbs | The Internet is like a big city:
>>> \ / <cgibbs@kltpzyxm.invalid> | it has plenty of bright lights and
>>> X I'm really at ac.dekanfrus | excitement, but also dark alleys
>>> / \ if you read it the right way. | down which the unwary get mugged.
>>
>> Thanks. Can I add yours to my file, and should I attribute it to you?
>
> Sure, as long as the attribution is kept.

Thanks! (I changed it to my usual sig format.)

--
The Internet is like a big city: it has plenty of bright lights and
excitement, but also dark alleys down which the unwary get mugged.
(Charlie Gibbs)