filecast

gistrec·gistrec.filecast

Send a file to every machine on your LAN at once over UDP broadcast/multicast.

filecast is a cross-platform command-line tool that sends a single file to every host on the same LAN at once, using UDP broadcast or IP multicast, with automatic retransmission of dropped packets. One sender reaches any number of receivers in the time of a single transfer. It verifies each file end-to-end with SHA-256, resumes interrupted receives, and needs no server, relay, or internet connection.