I would ask if on Cygwin I can use the 'write' command:
write - send a message to another user
$ write USER [ttyname]
I remember I have used it some years ago, but not remember if it was on
GNU/Linux or Cygwin.
I did a research on http://cygwin.com/packages and didn't find it, but
perhaps I did the wrong search..
TIA,
Angelo.
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