No Ubuntu eth0? Troubleshooting Network Interface Names Changes in Recent Ubuntu Releases70

In recent Ubuntu releases, the network interface name eth0 has been replaced with enp0s3, enp0s8, and so on. This change can cause confusion for users who are accustomed to the old naming convention. In this article, we will explain why the change was made and how to troubleshoot network interface name changes in Ubuntu.## Why the Change?

The change from eth0 to enp0s3 and other similar names is due to the adoption of a new naming scheme for network interfaces in Linux. The new scheme is based on the Peripheral Component Interconnect Express (PCIe) bus, which is used to connect network cards to the motherboard. The new naming scheme provides more information about the location of the network card on the PCIe bus, which can be useful for troubleshooting.## Troubleshooting Network Interface Name Changes

If you are having trouble finding the network interface name in Ubuntu, there are a few things you can try:1. Use the `ip` command. The `ip` command can be used to display information about network interfaces. To use the `ip` command, open a terminal window and type the following command:
```
ip link
```

The output of the `ip` command will include a list of network interfaces. The network interface name will be listed in the `NAME` column.2. Use the `lshw` command. The `lshw` command can be used to display information about hardware devices. To use the `lshw` command, open a terminal window and type the following command:
```
lshw -class network
```

The output of the `lshw` command will include a list of network devices. The network interface name will be listed in the `logical name` column.3. Use the `/etc/udev/rules.d/` file. The `/etc/udev/rules.d/` file contains rules for assigning persistent names to network interfaces. You can edit this file to assign a specific name to a network interface.

To edit the `/etc/udev/rules.d/` file, open a terminal window and type the following command:```
sudo nano /etc/udev/rules.d/
```

Add the following line to the file, replacing `eth0` with the desired network interface name:```
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
```

Save the file and restart the `udev` daemon by typing the following command:```
sudo service udev restart
```
## Conclusion

The change from eth0 to enp0s3 and other similar names for network interfaces in Ubuntu can be confusing, but it is a necessary change that provides more information about the location of the network card on the PCIe bus. By using the `ip`, `lshw`, and `/etc/udev/rules.d/` file, you can troubleshoot network interface name changes and assign persistent names to network interfaces.

2024-12-23

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