The trackpad on my laptop will not middle-mouse paste. I figured it should be easy to simulate, just focus the target app and invoke 'xsel -o' with a hotkey from fluxbox. But it won't work, that is, xsel -o operates, but its output does not go to the focussed app.
Man xsel states that the -o option sends the current selection to standard output, which I assumed would be the app with focus. Could someone explain why it does not do so in this situation, and how to achieve the desired result?
Copyright Notice：Content Author:「user985675」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/30130492/bash-how-get-xsel-o-to-paste-to-focused-window-if-command-invoked-by-hotkey-in