# ps -ax | grep nginx
22546 ?        Ss     0:00 nginx: master process /usr/sbin/nginx
22953 pts/2    S+     0:00 grep nginx
29419 ?        Ss     0:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
29420 ?        S      1:59 nginx: worker process
29421 ?        S      1:54 nginx: worker process
29422 ?        S      1:56 nginx: worker process
29423 ?        S      1:49 nginx: worker process
29425 ?        S      0:09 nginx: cache manager process
30796 ?        S      1:49 nginx: worker process

kill 22546; kill 22953; kill ...

# ps -ax | grep node | cut -d' ' -f1 |
22546
24582
29419
29420
29421
29422
29423
29425
30796