How to generate lmhostid commonly used in Linux

Lmhostid may be unfamiliar to some people. Some people are familiar with it. What does it mean? It is licence manage hostid. in Chinese, it is the hostid used to manage the registration code. Many software use this ID to control the serial number. For example, if you want to purchase a software and apply for a license, you must provide the current lmhostid and other information of your machine, then the software chamber provides you with a registration code based on your lmhostid and other registration information, so that you can use the software.

For example, the IBM Rational purify and UIM/x I used during this time are like this. The former is a memory leak test tool, and the latter is a Unix/Linux UI production tool. The two software requires you to provide your lmhostid first, and then register the serial number for you. Generally, two computers have different lmhostids. Therefore, in general, a serial number cannot be installed on different computers; otherwise, information about licence authentication failure may occur.

How is the lmhostid calculated? It is actually very simple. You can use the ifconfig command in your Linux to check your network settings. At this time, you can see the MAC address of your Nic ., Is in hexadecimal format. You can change the uppercase letters like abcdef to lowercase letters, remove the colons in the middle, and connect them together to find that they are exactly the same as the lmhostid of your machine. For example, if your MAC address is 02: 12: 1A: 01: 56: 0b, your lmhostid is 02121a01560b. With this principle, You can flexibly modify your MAC address so that another computer can use the previously registered license.