Emacs: Sync Copy/Paste Clipboards with Linux X11

In Linux, if copy/paste doesn't work with other apps, you can add this:

;; after copy Ctrl+c in Linux X11, you can paste by `yank' in emacs
(setq x-select-enable-clipboard t)

;; after mouse selection in X11, you can paste by `yank' in emacs
(setq x-select-enable-primary t)

In X11, there are 2 major copy/paste mechanisms:

1. primary selection. When you select text using mouse, the text is automatically put into the primary selection, and middle click will paste it.
2. clipboard. X11's clipboard is similar to the clipboard in Mac or Windows. You copy/paste by menu or keyboard.

The primary selection and clipboard are independent.

References:

• Window System Selections (ELISP Manual)
• X Selections, Cut Buffers, and Kill Rings ~2002-01-01 By Jamie Zawinski. At http://www.jwz.org/doc/x-cut-and-paste.html
• X Window selection

If you want to sync X11's “primary selection” and “clipboard” always, see: Linux: Sync X11 Primary Selection and Clipboard