Re: [Xen-users] can the root password be recovered from a DomU

[Tim Wickberg <wickbt@xxxxxxx>]

Assuming your image file has been partitioned, you'll need to specify 
the offset to the start of the partition you want to mount. Otherwise 
you're trying to mount the partition table as a filesystem, which is why 
you see the "must specify a filesystem type" error.
What you want (assuming you want the first partition, which starts at 
block 62 * 512 bytes/block) is:
mount -o loop,offset=$((62*512) mydisk.img /mnt

A few quick references:
http://darkdust.net/writings/diskimagesminihowto
http://www.openclose.it/creare_e_usare_un_disco_immagine.do


Kevin McKeon wrote:
> Just curious if anyone knows this. If you loose the root password on a 
> Linux box, you can just boot from CDRom, mount the root partition and 
> edit /etc/shadow.
> Is it possible to do something similar with a DomU.
>
> I tried:
> mount -o loop mydisk.img /mnt
> but I got an error saying something like "you must specify a filesystem 
> type"
> mount -o loop -t ext3 mydisk.img /mnt does NOT work either (I've also 
> tried moving the '-t ext3' part but no go)
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