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using nodejs to automate bash interaction as if typing from a terminal

I was trying to use "spawn" from "child_process" to talk to the "ssh" utility (Ubuntu 20, bash 5.0, node 19.6), but got the message "Pseudo-terminal will not be allocated because stdin is not a terminal" (using "-t -t" made it bypass stdout and print directly to the terminal). In this case I can probably just use a dedicated module, but I doubt that it is the only program that is fussy about where its input is coming from and I'd like to avoid this issue in the future.

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