When boot installer on an intel-x86-64 board, network is down and eth0 is not configured. Run ifconfig that only lo shows in output.
/wrlinux-x/wrlinux/configure --enable-board=intel-x86-64 --enable-kernel=standard --enable-rootfs=wr-installer --enable-target-installer=yes --enable-bootimage=iso #dd the iso to a usb stick. dd if=/tmp/wrlinux-image-installer-intel-x86-64-20140514081839.iso of=/dev/sdb bs=16M Boot the board with the USB stick.