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Re: image created by debootstrap does not work





On 09/22/2017 04:02 PM, Reco wrote:
> <DM5PR12MB190060F6A3633E658F56D98FBC670@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
>
>      Hi.
>
> On Fri, Sep 22, 2017 at 07:07:28PM +0000, 慕 冬亮 wrote:
>> qemu-system-x86_64 -kernel /boot/vmlinuz-4.12.0-1-amd64 -hda
>> qemu-stretch.img -append "root=/dev/sda1 single"
One small problem I have modified, sda1 => sda.
There is no any partition in image file.
>>
>> However, the result shows that "VFS: unable to mount root fs".
> And that's exactly how it should be. I'm not sure about jessie's kernel,
> but stretch one has ext support built as a module (CONFIG_EXT4_FS=m).
>
> Meaning - if you want to boot from ext2/ext4 filesystem you'll need
> initrd. This qemu invocation does not supply one.
I tried the following command, that uses the default initrd in /boot, 
but dead loop "floopy error -5 while reading block 0"

qemu-system-x86_64 -kernel /boot/vmlinuz-4.12.0-1-amd64 -initrd 
/boot/initrd.img-4.12.0-1-amd64 -hda qemu-stretch.img -append 
"root=/dev/sda single"

>
>> I learn the method from the following website:
>>
>> https://www.collabora.com/news-and-blog/blog/2017/01/16/setting-up-qemu-kvm-for-kernel-development/
> I'm genuinely surprised that such method worked for them.
I have learned how to use busybox as basic environment.
Is that any tutorial to show how to make debian debootstrap image as 
basic environment?
>
> Reco

-- 

My best regards to you.

      No System Is Safe!
      Dongliang Mu