1、查看占用端口的进程列表
	lsof -i:port
[root@localhost ~]# lsof -i:80
	COMMAND  PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
	nginx   1849  root      6u  IPv4  38588      0t0  TCP *:http (LISTEN)
	nginx   1850  www    6u  IPv4  38588      0t0  TCP *:http (LISTEN)
	nginx   1851  www    6u  IPv4  38588      0t0  TCP *:http (LISTEN)
	nginx   1852  www    6u  IPv4  38588      0t0  TCP *:http (LISTEN)
	nginx   1853  www    6u  IPv4  38588      0t0  TCP *:http (LISTEN)
2、查看各个占用端口的程序列表
	netstat -lnp –ip
[root@localhost ~]# netstat -lnp –ip
	Active Internet connections (only servers)
	Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name
	tcp       0      0 0.0.0.0:3306              0.0.0.0:*                   LISTEN      1714/mysqld
	tcp       0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      1849/nginx
	tcp       0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      1000/sshd
	udp     0      0 0.0.0.0:750                0.0.0.0:*                               967/portreserve
	udp     0      0 0.0.0.0:636                0.0.0.0:*                               967/portreserve
3、查看占用端口的链接的列表
	netstat -anp | grep port
[root@localhost ~]# netstat -anp | grep 80
	tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      1849/nginx
	tcp        0      0 ::ffff:192.168.1.104:8005   :::*                        LISTEN      1754/java
	tcp        0      0 :::8009                     :::*                        LISTEN      1754/java
	tcp        0      0 :::8080                     :::*                        LISTEN      1754/java
	unix  2      [ ]         DGRAM                    10802  1008/crond