Do you use Sync Watch State and Ratings as that should work and is probably the easiest way to do it.
Alternatively, take a look at this thread → Corrupt Database - Transferring User Information - #74 by anon5074910 (user anon5074910) is my previous account).
Couple of caveats …
- this is a more advanced method as your doing direct database exports and imports.
- I’d also recommend using the same settings for your libraries between source & target.
- your naming of media should really match the plex recommended naming conventions as the watched & history data will need to align after you re-import your media. This alignment is done via plex guids and not folder paths so going from windows → linux is not relevant as long as the libraries structure and media itself is the same.
