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This article introduces how to use python to write Mini Program to detect linux port occupation, the content is very detailed, interested friends can refer to, I hope it can be helpful to you.

Today, I'm going to use python to write a port probe Mini Program to detect whether some specific service ports are occupied. I suddenly find that I don't know how to query for port occupancy in linux.

1. Lsof-I: the port number is used to check the usage of a port, for example, to check the usage of port 8000, lsof-ilsof 800 lsof-i:8000COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAMElwfs 22065 root 6u IPv4 4395053 0t0 TCP *: irdmi (LISTEN)

You can see that port 8000 has been occupied by the lightweight file system forwarding service lwfs

2. Netstat-tunlp | grep port number, which is used to view the progress of the specified port number, such as port 8000. Netstat-tunlp | grep 800 ordinary netstat-tunlp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 00 0.0.0.0grep 111 0.0.0.0grep * 5908 0.0.0.0 * LISTEN 25492/qemu-kvm tcp 0 00.0.0.0vel6996 0.0.0.0 LISTEN 22065/lwfs tcp 0 192.168.122.1 Vol 53 0.0.0.0Vol * LISTEN 38296/dnsmasq tcp 0 0 0.0.0.0 LISTEN 5013/cupsd 22 0.0.0.0 LISTEN 5013/cupsd * LISTEN 5278/sshd tcp 0 0 127.0.1 Tcp 0 0 127.0.0.1 LISTEN 44868/lwfs tcp 25 0.0.0.0 LISTEN 5962/master tcp 0 0 0.0.0.0 LISTEN 44868/lwfs tcp 0 0 0.0.0.0: 8000 0.0.0.0 grep 8000tcp * LISTEN 22065/lwfs# netstat-tunlp | grep 8000tcp 00 0.0.0.015 8000 0.0.0.0 LISTEN 22065/lwfs

Explain the meaning of several parameters:

-t (tcp) shows only tcp-related options-u (udp) shows only udp-related options-n refuses to show aliases, can display all numbers converted to numbers-l lists only the service status in Listen (monitoring)-p shows the name of the program that established the relevant link

Attach a python port occupancy monitoring program, which can monitor whether the port of the specified IP is occupied.

#! / usr/bin/env python#-*-coding:utf-8-*-import socket, time, threadsocket.setdefaulttimeout (3) # set the default timeout def socket_port (ip, port): "" enter IP and port number Scan to determine whether the port is occupied by "" try: if port > = 65535: print u' Port scan ends' 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' Port occupied 'lock.release () except: print u' Port scan exception' def ip_scan (ip): "" enter IP Scan the 0-65534 port of IP "" try: print u' start scanning% s'% ip start_time=time.time () for i in range (0meme 65534): thread.start_new_thread (socket_port, (ip, int (I)) print u' scan port completed Total time:% .2f'% (time.time ()-start_time) # raw_input ("Press Enter to Exit") except: print u' scan ip error'if _ name__=='__main__': url=raw_input ('Input the ip you want to scan:') lock=thread.allocate_lock () ip_scan (url)

The execution result of the program is as follows:

# python scan_port.pyInput the ip you want to scan: 20.0.208.112 start scanning 20.0.208.11220.0.208.112: 111Port occupied 20.0.208.112: 22 Port occupied 20.0.208.112: 8000 Port occupied 20.0.208.112: 15996 Port occupied 20.0.208.112: 41734 Port occupied scanning Port completed Total time: 9.38 on how to write Mini Program with python to detect linux port occupancy is shared here, I hope the above can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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