Wired Networking - Raspberry Pi User Manual

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FOR MOST USERS,
Model B's Ethernet port—or a USB Ethernet adapter in the case of the Model A . For others,
however, the network requires manual configuration .
If you know that your network doesn't have a Dynamic Host Configuration Protocol (DHCP)
server—a system that tells the Pi and other devices on the network how they should con-
nect—or if you want to use a USB wireless adapter with the Pi, read on .

Wired Networking

If the network still doesn't work, you may need to configure it manually . Normally, the net-
work in a home, school or office has a DHCP server that tells the Pi and other devices on the
network how they should connect . Some networks, however, don't have a DHCP server and
need to be set up manually .
The list of network interfaces, along with information about how they should be configured,
is stored in a file called
the root user can edit, because removing a network interface from this list will cause it to stop
working .
From the terminal, you can edit this file using a variety of different text editors . For simplic-
ity, the
following command:
sudo nano /etc/network/interfaces
Nano
You can move your cursor around the document with the arrow keys, save by holding down
the CTRL key and pressing O, and quit by holding down the CTRL key and pressing X .
The line you need to edit for manual configuration starts with
dhcp
then fill in the remaining details in the following format with a tab at the start of each line:
[Tab] address xxx.xxx.xxx.xxx
[Tab] netmask xxx.xxx.xxx.xxx
[Tab] gateway xxx.xxx.xxx.xxx
Make sure that you press the Tab key at the start of each line, and don't actually type [Tab] .
The
For
R A S P B E R R Y P I
configuring the Pi's network is as easy as plugging a cable into the
interfaces
text editor should be used for this process . Open the file for editing with the
nano
is a powerful yet lightweight text editor, with a simple user interface (see Figure 4-1) .
from the end of this line and replace it with
characters in the configuration lines represent network addresses you'll need to enter .
x
, you should enter the static IP address that you want to assign to the Pi . For
address
U S E R G U I D E
located in the folder
/etc/network
, press Enter to start a new line, and
static
. This is a file only
. Delete
iface eth0 inet