One of the big things that took me a while to get right in tmux was copy/pasting. The gripes of trying to get it to work were enough to nearly make me forget using it all together.
Here’s what you need to know.
and then in your .tmux.conf
Assign a binding to copy the current buffer
In your .tmux.conf set a binding to copy the buffer
Now it actually took me ages to work out how to use this properly. Once you have created the buffer, either through selecting it with the mouse or by using PREFIX – [ and SPACE/ENTER, press PREFIX – C-c and it will be copied to your system clipboard.
Use the option key
If you hold down the option key while in the terminal, you can create a selection just as if you’re weren’t in tmux.