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I would like to know if upgrading Ubuntu from 12.04 to 12.10 via update is actually downloading the complete 12.10 OS or its just the necessary files.

Thank you

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I can not explain it better than the image in the answer here:… – Rinzwind Nov 22 '12 at 15:39

The mentioned image says everything better than i will now, but still...

It will only download the new packages which are needed, which may be a lot but only them.

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Thank you for that – Uttam Baroi Nov 22 '12 at 16:50

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