Why my ethernet interface is called enp0s10 instead of eth0?

Question

Just that, when I run

ifconfig -a

I only get lo and enp0s10 interfaces, not the classical eth0

What does enp0s10 means? Why is there no eth0?

Answer 1

That's a change in how now udevd assigns names to ethernet devices. Now your devices use the "Predictable Interface Names", which are based on (and quoting the sources):

1. Names incorporating Firmware/BIOS provided index numbers for on-board devices (example: eno1)
2. Names incorporating Firmware/BIOS provided PCI Express hotplug slot index numbers (example: ens1)
3. Names incorporating physical/geographical location of the connector of the hardware (example: enp2s0)
4. Names incorporating the interfaces's MAC address (example: enx78e7d1ea46da)
5. Classic, unpredictable kernel-native ethX naming (example: eth0)

The why's this changed is documented in the systemd freedesktop.org page, along with the method to disable this:

ln -s /dev/null /etc/udev/rules.d/80-net-setup-link.rules

or if you use older versions:

ln -s /dev/null /etc/udev/rules.d/80-net-name-slot.rules

Answer 2

Answer on "What does enp0s10 means?" question:

enp0s10:

en      -- ethernet

  p0    -- bus number (0)

    s10 -- slot number (10)

Source: udev-builtin-net_id.c on GitHub