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

ubuntu中设置鼠标选中即复制的功能。（不太好用，设置之后vs code中也变成了鼠标选中即复制……写代码的时候不行，还是设置个快捷键吧）

主要命令和设置：

it's possible.

sudo apt-get install parcellite

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