Configuring the network

Next, let’s look at some basic network configurations so that we can communicate with the outside world. I assume that there is an Ethernet interface (eth0) and that we only need a simple IPv4 configuration.

These examples use the network utilities that are part of BusyBox, which are sufficient for our simple use case. All we need are the old-but-reliable ifup and ifdown programs. You can read the manual pages for both to get the details. The main network configuration is stored in /etc/network/interfaces. You will need to create these directories in the staging directory:

etc/network etc/network/if-pre-up.d etc/network/if-up.d var/run 

Here is /etc/network/interfaces for a static IP address:

auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.1.101 netmask 255.255.255.0 network 192.168.1.0 

Here is /etc/network/interfaces for a dynamic IP address, allocated using DHCP:

auto lo iface lo...