syslinux/extlinux 除錯摘要

WARNING: No configuration file found
boot:

缺少 syslinux.cfg /extlinux.conf 設定檔

---

NO DEFAULT or UI configuration directive found!
boot:

syslinux.cfg 設定檔中缺少  default 設定
設定範例
default vm initrd=initrd.img root=/dev/root