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Empty - an expectlike tool to run command-line interactive programs in
UNIX shell-scripts
empty is an utility that provides an interface to execute and/or interact
with processes under pseudo-terminal sessions (PTYs). It can be used to
automate otherwise interactive programs like telnet, ssh, and ftp. In
some cases, empty can be the simplest replacement for TCL/expect or other
(similar) programming tools.
Empty is also Somewhat similar in functionality to POTS modem chat(8) or the
scripting capabilities of minicom(1); however it's small and general purpose.
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