Using a little known tool called #zpaq for compression/archival/backing up certain things. I want to write an article about it soon. In fact, I think that's what I might do next: make a #spacecookie/#tor #Docker image (on GitHub).
Oh, now I'm reading about incremental backups, on tape, with tar with `g` or the `u` flag. I was accidentally just using `c` each time, which I guess recreates the tar each time!