On Tue, Nov 10, 2015 at 10:52 AM, Arun Khan <knura9@xxxxxxxxx> wrote:
> On Mon, Nov 9, 2015 at 9:31 PM, Alessandro Baggi
> <alessandro.baggi@xxxxxxxxx> wrote:
>> Hi list,
>> how to perform a differential backup using rsync?
>>
>> On web there is a great confusion about diff backup concept when searched
>> with rsync.
>>
>> Users says diff because it copy only differences. For me differential is
>> backup from last full backup.
>>
>
> You can use "newer" options of the find command and pass the file list
> to rsync or scp to "backup" only those files that have changed since
> the last run. You can keep a file like .lastbackup and timestamp it
> (touch) at the start of the backup process. Next backup you compare
> the current timestamp with the timestamp on this file.
>
Clarification -- for diffrential back ups, you should touch the file
only when you do the *full* backup.
-- Arun Khan
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