/etc/sysconfig/network, /etc/sysconfig/network-devices/ifup-eth0, /etc/sysconfig/network-devices/ifdown-eth0, /etc/sysconfig/networkdevices/ifconfig.eth0 Note that we use eth0 as the interface throughout these instructions. 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 DHCP configuration. Note that static and DHCP interfaces can co-exist on a LFS system, only make the alterations to those interfaces which need to support DHCP. The first step is to remove the GATEWAY and GATEWAY_IF variables from /etc/sysconfig/network. This should only be done if the default interface you intend to use will be using DHCP and only needs to be done once; regardless of how many interfaces you are setting up. cd /etc/sysconfig && cp network network.bak && sed "s/GATEWAY/# GATEWAY/" network.bak > network Now you can create the appropriate ifconfig.eth0 file with the following commands (note that this will overwrite any existing file): cd /etc/sysconfig/network-devices && cat > ifconfig.eth0 << "EOF" ONBOOT=yes DHCP_PROG=<path to dhcp> DHCP_START=<start parameters> DHCP_STOP=<stop parameter> EOF Review the appropriate manpages for parameters; for example, the stop parameter for dhcpcd is '-k', while the stop parameter for dhclient is '-r'. You then need to create DHCP specific scripts. First, the ifup-eth0 script: cat > ifup-eth0 << "EOF" #!/bin/sh source /etc/sysconfig/rc || exit source $rc_functions || exit source $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 > ifdown-eth0 << "EOF" #!/bin/sh source /etc/sysconfig/rc || exit source $rc_functions || exit source $network_devices/ifconfig.eth0 || exit echo "Bringing down the eth0 interface..." $DHCP_PROG $DHCP_STOP evaluate_retval EOF Finally, we need to make these scripts executable: chmod 755 ifup-eth0 && chmod 755 ifdown-eth0