ubuntu: How to Copy selection to clipboard automatically like putty?

ubuntu中設置鼠標選中即複製的功能。（不太好用，設置之後vs code中也變成了鼠標選中即複製……寫代碼的時候不行，還是設置個快捷鍵吧）

主要命令和設置：

it's possible.

sudo apt-get install parcellite

then in the settings check "use primary" and "synchronize clipboards". it works.