Change one file in an ISO image

Jason jhelfman at
Thu Sep 17 02:03:50 UTC 2009

Why not just make a release with the updated file?

On Wed, Sep 16, 2009 at 07:26:01PM -0400, Bryant Eadon thus spake:
>Gelsema, P (Patrick) - FreeBSD wrote:
>>Hi list,
>>I need to change one file in an existing ISO image. It is a DVD image btw.
>>Unfortunately I dont have many options of changing the fie before creating
>>the image.
>>Mounting is not the issue, copying data neither but the ISO is also
>>bootable. There must be a simpler solution as in copying all the content
>>with cpio and making it bootable. OS on the DVD is WinPE btw.
>>Does anyone have some pointers for performing this action?
>Have you tried mounting it as a vnode ? and mounting it R/W ?
>mdconfig -a -t vnode -f file.img
>mount -t <type> /dev/md0 /mnt/rw_dvd
>Where <type> may be cd9660 or some other format of the image.
>I haven't seen reported success with this method (checked with 
>various google searches), but perhaps there's something along these 
>lines *will* work.
>Hope that helps,
>freebsd-questions at mailing list
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