buildos is a Debian-based in-memory, net-booted operating system specialized
for building software with the build2 toolchain.

Configuration
-------------

- Network is configured via DHCP. All Ethernet intrface that have carrier are
  tried in (some) order and the first interface that is successfully configure
  via DHCP is used.

- Hostname is configure from the DHCP information. Failed that, a name is
  generated based on the MAC address. @@ Maybe also kernel cmdline.

PXE
---

- Copy the kernel image and initrd to TFTP

# mkdir -p /var/lib/tftpboot/buildos
# cp buildos-image buildos-initrd /var/lib/tftpboot/buildos/

- Assuming the host has MAC address de-ad-be-ef-b8-da, create host-specific
  configuration (or use 'default' for the last path component to apply to
  all the hosts):

# cat <<EOF >/var/lib/tftpboot/pxelinux.cfg/01-de-ad-be-ef-b8-da
default buildos
prompt 1
timeout 50

label buildos
  menu label buildos
  kernel /buildos/buildos-image
  append initrd=/buildos/buildos-initrd
EOF