Linux如何查看端口(转)

Linux如何查看端口

1、lsof -i:端口号 用于查看某一端口的占用情况,比如查看8000端口使用情况,lsof -i:8000

# lsof -i:8000
COMMAND   PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
lwfs    22065 root    6u  IPv4 4395053      0t0  TCP *:irdmi (LISTEN)

可以看到8000端口已经被轻量级文件系统转发服务lwfs占用

 

2、netstat -tunlp |grep 端口号,用于查看指定的端口号的进程情况,如查看8000端口的情况,netstat -tunlp |grep 8000

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      4814/rpcbind        
tcp        0      0 0.0.0.0:5908                0.0.0.0:*                   LISTEN      25492/qemu-kvm      
tcp        0      0 0.0.0.0:6996                0.0.0.0:*                   LISTEN      22065/lwfs          
tcp        0      0 192.168.122.1:53            0.0.0.0:*                   LISTEN      38296/dnsmasq       
tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      5278/sshd           
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      5013/cupsd          
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      5962/master         
tcp        0      0 0.0.0.0:8666                0.0.0.0:*                   LISTEN      44868/lwfs          
tcp        0      0 0.0.0.0:8000                0.0.0.0:*                   LISTEN      22065/lwfs        
# netstat -tunlp | grep 8000
tcp        0      0 0.0.0.0:8000                0.0.0.0:*                   LISTEN      22065/lwfs          

 

说明一下几个参数的含义:

                                

 -t (tcp) 仅显示tcp相关选项
                                 -u (udp)仅显示udp相关选项
                                 -n 拒绝显示别名,能显示数字的全部转化为数字
                                 -l 仅列出在Listen(监听)的服务状态
                                 -p 显示建立相关链接的程序名

 

附加一个python端口占用监测的程序,该程序可以监测指定IP的端口是否被占用。

#!/usr/bin/env python

# -*- coding:utf-8 -*-

import socket, time, thread
socket.setdefaulttimeout(3) #设置默认超时时间

def socket_port(ip, port):
"""
输入IP和端口号,扫描判断端口是否占用
"""
try:
if port >=65535:
print u'端口扫描结束'
s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
result=s.connect_ex((ip, port))
if result==0:
lock.acquire()
print ip,u':',port,u'端口已占用'
lock.release()
except:
print u'端口扫描异常'

def ip_scan(ip):
"""
输入IP,扫描IP的0-65534端口情况
"""
try:
print u'开始扫描 %s' % ip
start_time=time.time()
for i in range(0,65534):
thread.start_new_thread(socket_port,(ip, int(i)))
print u'扫描端口完成,总共用时:%.2f' %(time.time()-start_time)
# raw_input("Press Enter to Exit")
except:
print u'扫描ip出错'

if __name__=='__main__':
url=raw_input('Input the ip you want to scan: ')
lock=thread.allocate_lock()
ip_scan(url)

该程序执行结果如下:

Input the ip you want to scan: 20.0.208.112
开始扫描 20.0.208.112
20.0.208.112 : 111 端口已占用
20.0.208.112 : 22 端口已占用
20.0.208.112 : 8000 端口已占用
20.0.208.112 : 15996 端口已占用
20.0.208.112 : 41734 端口已占用
扫描端口完成,总共用时:9.38

https://www.cnblogs.com/wangtao1993/p/6144183.html
posted @ 2019-06-21 10:51  鳌园  阅读(4566)  评论(0编辑  收藏  举报