[Nottingham] backup commands

Andy Smith andy at lug.org.uk
Sat Aug 4 19:21:18 BST 2007


On Sat, Aug 04, 2007 at 06:15:07PM +0000, vanschoo at speakeasy.net wrote:
> when you copy to a USB stick it's important to verify right then
> that the info on the USB stick completely matches that on the
> source media.
> Can someone post a short script or just some sample commands for
> doing this? I'd just like to see examples of the options and
> commands others are using - sort of as a starting point for
> deciding what I want to use.

For a single file?  "md5sum" will do it:

$ cp final.tar final2.tar
$ md5sum final.tar final2.tar
ba635b30f3848330ea0a25ef48d7fb9a  final.tar
ba635b30f3848330ea0a25ef48d7fb9a  final2.tar

If the hashes match then the files are identical..


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