Package lrzsz

The lrz and lsz modem communications programs

http://www.ohse.de/uwe/software/lrzsz.html

Lrzsz (consisting of lrz and lsz) is a cosmetically modified
zmodem/ymodem/xmodem package built from the public-domain version of
the rzsz package. Lrzsz was created to provide a working GNU
copylefted Zmodem solution for Linux systems.

General Commands
Command Description
rz XMODEM, YMODEM, ZMODEM (Batch) file receive
sz XMODEM, YMODEM, ZMODEM file send