nginx为何存在一个服务占用两个端口，且开启它显示端口占用，杀掉进程PID仍会产生新的进程

Question

nginx为何存在一个服务占用两个端口8000，且开启它显示端口占用，杀掉进程PID仍会产生新的进程，仍然端口占用

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 127.0.0.1:27017         0.0.0.0:*               LISTEN      2411/mongod         
tcp        0      0 127.0.0.1:6379          0.0.0.0:*               LISTEN      1787/redis-server 1 
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      36683/nginx: master 
tcp        0      0 0.0.0.0:21              0.0.0.0:*               LISTEN      860/pure-ftpd (SERV 
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1502/sshd           
tcp        0      0 0.0.0.0:888             0.0.0.0:*               LISTEN      36683/nginx: master 
tcp        0      0 0.0.0.0:8888            0.0.0.0:*               LISTEN      989/python          
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1466/master         
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      36683/nginx: master 
tcp        0      0 0.0.0.0:8000            0.0.0.0:*               LISTEN      36683/nginx: master 
tcp        0      0 0.0.0.0:833             0.0.0.0:*               LISTEN      36683/nginx: master 
tcp6       0      0 :::3306                 :::*                    LISTEN      2362/mysqld         
tcp6       0      0 :::21                   :::*                    LISTEN      860/pure-ftpd (SERV 
tcp6       0      0 :::22                   :::*                    LISTEN      1502/sshd           
tcp6       0      0 ::1:25                  :::*                    LISTEN      1466/master         

Answer 1

netstat - antlp | grep nginx

你要看下你的nginx conf文件是否配置监听多个端口