Нашёл obexftp, но, во-первых, оно хочет обязательного спаривания с приёмником (ну, это ладно), во-вторых, почему-то не работает :)
$ obexftp -b 00:17:83:CF:16:89 -p Lem_4201_11_Mir_na_Zemle.102782.fb2.zip
Browsing 00:17:83:CF:16:89 ...
Connecting...failed: connect
error on connect(): Invalid argument
Still trying to connect
Connecting...failed: connect
error on connect(): Invalid argument
Still trying to connect
Connecting...failed: connect
error on connect(): Invalid argument
Still trying to connect
obex_test ведёт себя странно:
$ obex_test -b 00:17:83:CF:16:89
Using Bluetooth RFCOMM transport
OBEX Interactive test client/server.
> c
Connect OK!
Version: 0x10. Flags: 0x00
> p
PUT file (local, remote)> /home/balancer/Desktop/Lem_4201_11_Mir_na_Zemle.102782.fb2.zip