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How can I take the input and the output of a terminal? To be more specific, what I want to do is to take everything that is typed in the terminal, and everything that the "terminal" types (in real time).

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script should be what you are looking for (man page).

Start a logged session with script /path/to/your/logfile, every command and its output will be logged into the logfile.

If you need timing info for a realistic replay, use script -t=/path/to/your/timingfile /path/to/your/logfile. Afterwards, you can replay the log using scriptreplay /path/to/your/timingfile /path/to/your/logfile.

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Copy/paste method usually works for simple input/output.

In case you'd like to monitor what's going on within another terminal window try tmux.

You may find more here

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