. . . "Finally, I have reinstall my home ipmasq box to debian Sarge. (It is a Mandrake previously, while once a upon of time I want to try Mandrake 7.x for teaching and have not time to upgrade it for years) Alas that it is a pretty old box (AMD K6, bought in 1999) and I have not touch it physically for long time, the CD-ROM drive is dirty and fail to boot any Debian Installer within my finger except the B" .