On Linux, Control-C and Control-V don't work for copying and pasting in terminals. The Control modifier is used for its original purpose of inserting control codes. Instead, terminal apps require an extra Shift modifier, like Control+Shift+C.
But what if there were hidden shortcut combos for copy and paste
I don’t understand why they mention programmable keyboards there. Buying a programmable keyboard to be able to rebind your keys is silly when it can be made entirely through software. On X11 for example you can load a .Xkeymap file and set your keyboard mappings this way. I use this to have a modified dvorak keymap with Altgr+auoeidhtns giving [(] on the home row for instance, very convenient. Then I use my window manager i3 to rebind mod+p to send Ctrl+V using xdotool (because mod+p seems more vim-like) and I’ve set my terminal urxvt to treat Ctrl+V as paste. if all software supported the Sun copy paste keys then I could send those keys instead of Ctrl+V.
it is nice to be able to plug your keyboard into a new computer and have all your shortcuts and layout set up though. I do that so I have the same layout and shortcuts on my personal and work computers regardless of os