I currently have Simple backup doing my backups for me. It backs up to a folder say sdb1/backups . I have made a basic alias that I can type at the command line which copies the sdb1/backups contents to an external hard drive /500gb/backups. The alias copies across all the new backups and updates existing copies if they have changed.
Simple backup is doing the logarithmic backup where it keeps 1 backup from today, 1 from yesterday, 1 from last week and so on. Simple backup does it's own deleting to keep things tidy which is my issue. While my alias copies all the new stuff across to the second backup area it doesn't delete the files that the originating backups folder no longer has. I'm not really sure how to get the second backup folder to dispose of these files. I'm going to change from the alias to a basic script that will run from cron.
I am wondering how to compare the source folder of backups to the secondary backups and keep them in line. I think I need to pipe a list from the source folder into grep -v or something and then remove the difference.
Any ideas ?