When I want to kill a process using the pid in linux, its subprocess still existes. I hope to kill all process using one command.
About linux : Is-there-a-simple-method-to-kill-a-process-and-all-subprocess-in-linux-system
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Suggesting command pkill -p PID pattern .
See more documentation here.
Check out process groups:
https://en.wikipedia.org/wiki/Process_group
Assuming you want to do this from a shell?
If you do a kill and make the top process negative it does a killpg under the covers and sends the signal to all the processes in the group.