[ILUG] Hard Disk Protection in Live CD Boot Ups

[Kuda Dube]

Hi,

It is possible to modify a harddisk-based Linux configuration during
Live CD bootup session, e.g., today when I lost sudoer entry for my
Ubuntu account, I used a live CD to re-instate it (... no clue how the
entry disappeared!). If I want to ensure that no one can change my
configuration files using live CDs, how can I do this? I know this
ability is useful but it is also dangerous.

Regards
---
Kuda