Providing input/subcommands to command executed over SSH with JSch

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Calling ChannelExec.setCommand multiple times has no effect.

And even if it had, I’d guess that the 192.168.50.1 : and Config.txt are not commands, but inputs to the copy run tftp : command, aren’t they?

If that’s the case, you need to write them to the command input.

Something like this:

ChannelExec channel = (ChannelExec) session.openChannel("exec");
channelExec.setCommand("copy run tftp : ");
OutputStream out = channelExec.getOutputStream();
channelExec.connect();
out.write(("192.168.50.1 : \n").getBytes());
out.write(("Config.txt \n").getBytes());
out.flush();

In general, it’s always better to check if the command has better “API” than feeding the commands to input. Commands usually have command-line arguments/switches that serve the desired purpose better.

A related question: Provide inputs to individual prompts separately with JSch.

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