Next, let's look at some basic network configurations so that we can communicate with the outside world. I am assuming that there is an Ethernet interface, eth0, and that we only need a simple IP v4 configuration.
These examples use the network utilities that are part of BusyBox, and are sufficient for a simple use case, using the old-but-reliable ifup and ifdown programs. You can read the man pages on both for more 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
For a static IP address, etc/network/interfaces would look like this:
auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.0.0.42 netmask 255.255.255.0 network 10.0.0.0
For a dynamic IP address allocated using DHCP, etc/network/interfaces would look like this:
auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp
You...