On 10 Dec 2022 19:22 -0500, from clemc(a)ccc.com (Clem
Cole):
My memory is there were also a bunch of two
letter programs, rx/sx and rz/sz and the like. Frankly its been so long
since I had any use for them, I've forgotten.
I remember at least sz/rz from my early (for me) forays into UNIX,
back when ZModem was pretty much state of the art at least on micros
and I had files locally that I wanted remotely or vice versa. The
mnenomic being s(end)/r(eceive) z(modem); "send" and "receive", of
course, being local to the remote host, so the opposite sense of what
one would do with the terminal emulator program that one interacted
with locally. So "sz <some file>" at the prompt, then activate the
"receive ZModem transfer" function locally; or "rz <some
file>", then
activate the "send using ZModem" function locally.
I think the host I was on at the time (which appears to have been some
Solaris) also offered XModem and YModem variants as [rs][xy], but I
never used those because someone had at some point told me that ZModem
was better. :-)
Kind-of a pain to type as I'm SSHing in from my phone, but they still
exist and I have "lrzsz" installed on my Debian box.
-uso.