/etc/sysconfig/network, /etc/sysconfig/network-devices/ifup-eth0, /etc/sysconfig/network-devices/ifdown-eth0, /etc/sysconfig/network-devices/ifconfig.eth0 Note that on this and the following pages, we use eth0 as the example interface. If you want to configure a different (or more than one) interface, simply replace eth0 with the interface you wish to use. These instructions will convert the configuration files from LFS (a static configuration) to a configuration using the DHCP protocol. Note that static and DHCP-based interfaces can co-exist on a LFS system. To do this, you should only make the alterations to those interfaces which need to support DHCP. All of the instructions on this page are applicable no matter which DHCP client you intend to use. If the interface you intend to use as your default gateway is going to use DHCP, the first step is to remove the GATEWAY and GATEWAY_IF variables from /etc/sysconfig/network. This will only need to be done once. cd /etc/sysconfig && cp network network.bak && sed "s/GATEWAY/# GATEWAY/" network.bak > network You then need to create scripts which will override the default network scripts and provide DHCP support. These two scripts are generic and so for use with both DHCP clients. First, the ifup-eth0 script: cat > /etc/sysconfig/network-devices/ifup-eth0 << "EOF" #!/bin/sh . /etc/sysconfig/rc || exit . $rc_functions || exit . $network_devices/ifconfig.eth0 || exit echo "Bringing up the eth0 interface..." modprobe eth0 loadproc $DHCP_PROG $DHCP_START EOF Then the ifdown-eth0 script: cat > /etc/sysconfig/network-devices/ifdown-eth0 << "EOF" #!/bin/sh . /etc/sysconfig/rc || exit . $rc_functions || exit . $network_devices/ifconfig.eth0 || exit echo "Bringing down the eth0 interface..." $DHCP_PROG $DHCP_STOP evaluate_retval EOF Next, we need to make corrections to the /etc/hosts file. Be sure to replace HOSTNAME and DOMAIN_NAME with apropriate values. mv -f /etc/hosts /etc/hosts.bak && cat > /etc/hosts << "EOF" # Begin /etc/hosts 127.0.0.1 HOSTNAME HOSTNAME.DOMAIN_NAME localhost localhost.localdomain # End /etc/hosts EOF Finally, we need to make the scripts executable: chmod 755 /etc/sysconfig/network-devices/ifup-eth0 && chmod 755 /etc/sysconfig/network-devices/ifdown-eth0 This script, in its current state, will cause an error at shutdown. At the moment, it is best to just live with the error. The network scripts for LFS and BLFS are currently being revised. In the interim, you can use a simple workaround to rid yourself of the error. Move your K80network stop scripts to K49network. You must be absolutely certain, however, that you have all network filesystems unmounted before this script is executed.