[root@Nginx_BackUP keepalived]# ps -C nginx  PID TTY          TIME CMD 3965 ?        00:00:00 nginx 3966 ?        00:00:00 nginx 3968 ?        00:00:01 nginx[root@Nginx_BackUP keepalived]# ps -C nginx  --no-header 3965 ?        00:00:00 nginx 3966 ?        00:00:00 nginx 3968 ?        00:00:01 nginx#-C 接命令的名称 可查PID跟pgrep 差不多[root@Nginx_BackUP keepalived]# pgrep nginx396539663968