javier.chen wrote:

I have compiled a good busybox(the menu and udpcast added), and also compiled a .rom file for my etherboot. And i want to make udp-sender/receiver run before linux start. Then what should I do? To put busybox into rom? or other things? Please.

A .rom file is used to enable your network card to boot from the network. You need to flash it into the card's EPROM, you should either check your network card's documentation, or the etherboot website for instructions on how to do this. Please note however, that nowadays, most network cards are already to boot from network out of the box, so you might not need this step, and the .rom file at all. Once you have a card capable of booting from the network, you need to set up your server. 1. Make sure you've got a dhcp server, and that it's configured correctly 2. Make sure that you've got a tftp server . Prefer to use tftpd-hpa rather than plain tftpd 3. Set a filename to boot from in your dhcp.conf by adding the following instructions, and restart your dhcp server: next-server 1.2.3.4; filename "pxelinux.0"; where 1.2.3.4 is the IP address of your tftp server. If the tftp server and the dhcp server reside on the same machine, you can drop that line. 4. Copy pxelinux.0 (from syslinux) to the /var/lib/tftpboot directory on your tftp server. 5. Copy linux and initrd (from http://udpcast.linux.lu/current) to the same directory 6. make a /var/lib/tftpboot/pxelinux.cfg directory and put a default file in it with the following contents (between, but not including, the lines): ------- DEFAULT udpcast LABEL udpcast kernel linux append initrd=initrd PROMPT 0 TIMEOUT 0 -------- Regards, Alain