title: how to kill parallel program of R in Linux
body: <p>I use R to do parallel computing. Every time, when I want to kill the parallel program, I always use <code>kill 2130 2131 6456</code>(PID). Is there a way to kill all the programs of R?<img src="https://i.stack.imgur.com/hZqP5.jpg" alt="enter image description here"></p>