rescue CD bug report (and idea for a fix) for PXE/network boot and no DNS name resolution

netbootbugreporter

This is a bug report for the rescue CD. I use a custom PXE setup to netboot the live CD. DNS name resolution does not work and I believe I know why.

cat /proc/cmdline
BOOT_IMAGE=bitdefender/kernel.i386-pc root=/dev/nfs real_root=/dev/nfs nfsroot=192.168.1.1:/srv/nfs/bitdefender/ ip=dhcp loop=/rescue/livecd.squashfs looptype=squashfs initrd udev cdroot lang=de livecd.nfsif=08:00:de:ad:be:ef initrd=bitdefender/initfs.i386-pc

at the login screen on the first console (CTRL+ALT+F1), I see the following error message complaining about dhcpcd not being found:

/etc/init.d/livecd-setup: Zeile 101: dhcpcd: Kommando nicht gefunden.
/etc/init.d/livecd-setup: Zeile 102: dhcpcd: Kommando nicht gefunden.

There is a file called /etc/init.d/livecd-setup. It contains the following lines:

                if [ ! "x${NFSIFNAME}" = "x" ]
                then
                        dhcpcd -gnp "${NFSIFNAME}"
                        dhcpcd -x "${NFSIFNAME}"
                fi

However the file dhcpcd is not shipped with the live cd

user@server:/srv/nfs/bitdefender/rescue $ unsquashfs -l livecd.squashfs  | grep dhcpcd
squashfs-root/lib/netifrc/net/dhcpcd.sh

... and that is why name resolution does not work for me.

This fixed it:

sudo dhclient eth0