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[SOLVED] Is there a tool to replicate a filesystem?
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Stop googling and just read the rsync man page
Fair enough, sometimes you get tunnel vision with a problem.
For what I see the command doing, thanks for the progress flag, it seems to be doing what I need. Reading the manual, it also looks like it's not copying files that have the same size and timestamp in the source and destination, which is also what I wanted, even though I didn't make it explicit. I'll have to take a look to making the command parallel, probably by running it on every subdirectory of ~Music at once.
Thank you for your help!