+# man page doesn't explain this, but this deletes & thus disables
+# all chboot systems.
+e fai-chboot -Iv $std_arg default # set it to default to get a val out of it next
+kernel=$(fai-chboot -L '^default$' | awk '{print $3}')
+default_k_args=$(fai-chboot -L '^default$' | \
+ sed -r "s/^(\S+\s+){3}(.*)/\2/")
+# example of default_k_args
+# initrd=initrd.img-3.16.0-4-amd64 ip=dhcp root=192.168.1.3:/srv/fai/nfsroot aufs FAI_CONFIG_SRC=nfs://faiserver/srv/fai/config FAI_ACTION=install
+
+k_args=()
+for arg in $default_k_args; do
+ case $arg in
+ # default root arg is /srv/fai/nfsroot
+ root=*) k_args+=(root=$root_arg) ;;
+ *) k_args+=($arg) ;;
+ esac
+done
+rm -f /srv/tftp/fai/pxelinux.cfg/*
+e fai-chboot -k "${k_args[*]}" -v -f verbose,sshd,createvt,reboot $std_arg $kernel "$host"