question about backing up data
I recently learned how to use cp -urv to back only the files that have been modified since the last backup. But something I always wondered about this kind of backing up is, what do you do about files in the backup area that you have deleted on the main copy? If I don't want them on the main copy, I presumably don't want their backup copies either. If I wanted the space freed up, I wouldn't know how to get rid of them other than going into my backup hard drive and deleting them manually.
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