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A dynamic IP is assigned and another network device already has the same IP will cause IP address conflicts, so how to monitor IP address conflicts in the Linux system? This article will use the arp-scan tool to demonstrate the specific methods of monitoring P address conflicts in the Linux system.

This tool sends ARP (Address Resolution Protocol) (address Resolution Protocol) packets on the local network to collect addresses. If multiple MAC addresses claim to have the same IP address, then there is a conflict.

To install arp-scan on Ubuntu or Debian, enter:

$sudo apt-get install arp-scan for Fedora,CentOS or RedHat:

$sudo yum install arp-scan to detect IP conflicts, run the following command:

Example of $sudo arp-scan-I eth0-l output:

192.168.1.10 00:1b:a9:63:a2:4c BROTHER INDUSTRIES, LTD. 192.168.1.30 00:1e:8f:58:ec:49 CANON INC. 192.168.1.33 00:25:4b:1b:10:20 Apple Inc 192.168.1.37 10:9a:dd:55:d7:95 Apple Inc 192.168.1.38 20:c9:d0:27:8d:56 (Unknown) 192.168.1.39 d4:85:64:4d:35:be Hewlett Packard 192.168.1.39 00:0b:46:e4:8e:6d Cisco (DUP: 2) 192.168.1.40 90:2b:34:18:59: C0 (Unknown) the IP of 192.168.1.39 conflicts. Because it appeared twice.

What is Linux system Linux is a free-to-use and free-spread UNIX-like operating system, is a POSIX-based multi-user, multi-task, multi-threaded and multi-CPU operating system, using Linux can run major Unix tools, applications and network protocols.

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