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
rb alias for rz
rx alias for rz
rz XMODEM, YMODEM, ZMODEM (Batch) file receive
sb alias for sz
sx alias for sz
sz XMODEM, YMODEM, ZMODEM file send