Sending keyboard input to a program from command-line

Question

How do you send keyboard input to a program?

That is, under a Linux GUI, is there a good manual (programmable) way, or tool, of simulating keyboard input on a running pr

Answer 1

I've built a Ruby DSL around xdotool to simplify the focusing of windows and simulation of keyboard input. Here's an example, riffing on your original request:

Mani.new(window_manager: :xmonad) do
  window :hello, launch: 'urxvt' do
    run 'echo "hello\n"'
  end

  window :firefox, launch: 'firefox', delay: 1.5 do
    type '{{ctrl+t}}'
  end
end