On Sat, 10 Aug 2019 at 13:01, Greg Marks <gtmarks@gmail.com> wrote: > > On a computer running Debian 10, in a number of directories a > subdirectory "history" has mysteriously appeared containing a > file history.db. [...] > Does anyone know what might be causing this? I don't know the answer, but you might find some clues here: https://codesearch.debian.net/search?q=history.db&literal=1 Note the list of package names at the top of the page.