31
How to automatically share between linux PC and iPad?
(sh.itjust.works)
A community for everything relating to the GNU/Linux operating system
Also check out:
Original icon base courtesy of lewing@isc.tamu.edu and The GIMP
Syncthing is probably the best option. It'll keep a copy on both devices, and can sync any changes made on any device. It's a direct connection, no intermediary server required.
Another way, which is a bit round-about, but surprisingly easy: Install Zim Desktop Wiki (a notebook app), enable its built-in web server, and add your PDF to the Zim notebook. From the iPad use the web browser to open your Zim notebook (Assuming both are on the same wi-fi). This is read-only from the iPad, can't make changes.