When I run
ifconfig -a, I only get lo and enp0s10 interfaces, not the classical eth0
What does enp0s10 mean? Why is there no eth0?
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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):
- Names incorporating Firmware/BIOS provided index numbers for on-board devices (example: eno1)
- Names incorporating Firmware/BIOS provided PCI Express hotplug slot index numbers (example: ens1)
- Names incorporating physical/geographical location of the connector of the hardware (example: enp2s0)
- Names incorporating the interfaces's MAC address (example: enx78e7d1ea46da)
- 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 on "What does enp0s10 means?" question:
enp0s10: | | | v | | en| | --> ethernet v | p0| --> bus number (0) v s10 --> slot number (10)
Source: udev-builtin-net_id.c on GitHub
As mentioned above, enp0s10 refers to ethernet (en), prefix 0 (p0), slot 10 (s10). The bus number, device number, and function number are pulled from Bus Device Function (BDF) for PCI devices to create the prefix, slot, and function portions of the Predictable Network Interface Name.
Since function is 0, the f0 portion is omitted. I changed the prefix from p0 to p4 for clarity in this example.
Expanding on the other answer posted by 'DIG mbl':
enp4s10f0 pci 0000:04:0a.0 | | | | | | | | | | | | domain <- 0000 | | | | | | | | | | en| | | --> ethernet | | | | | | | | | p4| | --> prefix/bus number (4) <-- 04 | | | | | | s10| --> slot/device number (10)<-- 10 | | | f0 --> function number (0) <-- 0