I've recently installed Ubuntu Server 16.04. I've connected the Ethernet cable to my desktop, and it seems to have been found, but I can't connect to the Internet.

Here's the output from some commands:

**/etc/network/interfaces**

```
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto enp0s25
iface enp0s25 inet dhcp

```

**ip link**

```
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2. enp3so: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether fc:aa:14:09:90:df brd ff:ff:ff:ff:ff:ff

```

Where should I go from here?