So why do we need to change a MAC address?
Randomize your MAC address using NetworkManager - Fedora Magazine
There are mainly the following two reasons to change it:. In order to view the MAC addresses of all your network devices, you can use the following command on your Ubuntu terminal:.
The above output from my system shows MAC addresses of three network devices installed on my system. There is another way to view MAC addresses, but you may first need to install net-tools on your system through the following command:. In order to change the MAC address of a device, you first need to install a command line utility called the macchanger.
Select Yes through the arrow keys and then press Enter in order to configure macchanger to run automatically whenever a network device is brought up or down. The following command will let you get the interface-name of a device that you will be using later to change its MAC address:. If you need to restore the MAC address of a device to its original state, you can use the following command:.
The poor thing never cam back up again.
Lucky for me, the data centre could simply swap out my hard disks and put them into another server. CentOS stores this value in two of its files, and when it changes which is hardly ever the case , those files need to be updated. The following command will give us an overview:.
How to create or configure network bridge in CentOS / RHEL 7
This tells us that eth0 appears to be unavailable, probably because it could not be brought up. Each of these contains a file called address in which we can see our current MAC address. The thing is though that a folder like eth0 will only exist if eth0 is indeed a valid connection.
The folks at the data centre were nice enough to tell me that all I had to do to connect my server to the network again was to delete a single file called. XX stands for a priority number 70 in my case.
In our case, the file looks like this:. Deleting this file and restarting the server should have fixed my problem.
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