[weblogic@10_56_81_63 ~]$ ps -ax | grep nginx
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ
 6984 ?        S      1:30 nginx: worker process
 6985 ?        S     13:45 nginx: worker process
 8821 ?        Ss     0:07 nginx: master process ./nginx
26521 ?        Ss     0:00 nginx: master process /weblogic/openresty/nginx/sbin/nginx
26522 ?        S      0:00 nginx: worker process               
26523 ?        S      0:00 nginx: worker process               
29091 pts/1    S+     0:00 grep nginx
[weblogic@10_56_81_63 ~]$