No "eth0" listed in ifconfig -a, only enp0s3 and lo

So, I setup my Ubuntu box with VirtualBox, default settings - simple ISO image launch. After installing Ubuntu, I proceeded to test multiple programs, and everything was working fine. I have full access to the Internet on my host & inside the virtualbox, HOWEVER, I noticed even with my Ethernet connection I still do not have eth0 - instead I have enp0s3, which is weird.

Here is a result from the 'ifconfig -a' command:

enp0s3 Link encap:Ethernet HWaddr 08:00:27:36:5f:f2 inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fe36:5ff2/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:484 errors:0 dropped:0 overruns:0 frame:0 TX packets:370 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:294211 (294.2 KB) TX bytes:44269 (44.2 KB)
lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:274 errors:0 dropped:0 overruns:0 frame:0 TX packets:274 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:24496 (24.4 KB) TX bytes:24496 (24.4 KB)

Any reason why this might be happening?? How can I replace enp0s3 with eth0 and not have "10.0.2.15" as the inet addr, as clearly it shouldn't be that.

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2 Answers

With v197 we introduced predictable network interface names in systemd/udev that includes hardware information rather than a reference to the driver used. The following names are supported:

• 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)

So what you observe on installing 15.10 is a consequence of Ubuntu evolution.

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If you need to set the static IP of the VM:

1. Change the "Network Adapter" to bridged mode in Oracle's Ubuntu VM system settings.

2. Start Ubuntu VM

3. Type ifconfig

4. ifconfig returns enp0s3 and lo, therefore,

5. Type sudo ifconfig enp0s3 192.168.0.111 netmask 255.255.255.0 and you will set the static IP of the VM to 192.168.0.111.

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