Intriguing Live Distro Sum Changes . . .


 
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Operating Systems Linux Ubuntu Intriguing Live Distro Sum Changes . . .
# 1  
Old 11-15-2014
Intriguing Live Distro Sum Changes . . .

Greetings!

Here's something which I came across whilst mucking about with a UNetbootin thumbdrive install of 12.04 (I suspect this would apply to other variants as well).

Here's the scenario:

As an experiment before burning to flash, I generated a comprehensive md5sums.txt for the entirety of root; replacing the original short listing with a complete one. In doing so, I swept boot.cat onto the roster for verification.

Curiously, upon generating the iso, the sum for boot.cat seems to change in the process. FWIW, touching the two file specimens (pre- and post-iso) with identical timestamps won't bring the sums into agreement. The files are a match sizewise, and all seems to function OK when run...

The question: Is this a known behavior (and, hence, the abbreviated original sums listing), or is this truly out of the ordinary? What might be at work here?

Anyone know???

Thanks!

Last edited by LinQ; 11-15-2014 at 11:42 AM.. Reason: Errata --
# 2  
Old 11-17-2014
Update:

The issue with boot.cat was not reproducible in subsequent tests. Alterations to isolinux.bin during genisoimage usage seem to be of wider applicability.

See this thread for those details.

Thanks, and have a great day Smilie
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