I know you can highlight text with the mouse, but can this be done in a terminal on Linux/MacOSX with the keyboard only? I've tried using shift and other commands with the arrow keys to no avail.
Is this not possible with the keyboard?
I recommend using tmux. You can set it up with your own keyboard to highlight and copy text. See here.
To highlight the text in the linux ,you can use the below command
shift+arrow - highlight text
shift+ctrl+arrow - highlight an entire word
Please update us if you have issues.