Re: compare two directory trees

[Liam O'Toole <liam.p.otoole@gmail.com>]

On 2010-12-14, Yuwen Dai <yuwend@gmail.com> wrote:
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> Dear all,
>
> I burn DVD/CDs from ISO files.  In order to verify the burning is correct,
> I wrote a script working like this:
> 1. mount the DVD and ISO files onto two mount points
> 2. calculate every file's md5sum in each directory, and save and sort them
> in two separate files
> 3. compare the above two files.
>
> The above method does work, but too time consuming because of the md5sum
> calculating.  Do you have any suggestion to improve the efficiency?

Some installation CDs have a menu option which offers to verify the CD
prior to installation. It might be worth investigating what technique
they use and adapting it for your purpose.

Liam

-- 
Liam O'Toole
Cork, Ireland