So I made a mistake yesterday, accidentally deleting essential Windows files when working in Ubuntu (namely NTUSER.DAT).
Just quickly my system set-up: I have Windows 7 (NTFS partition) and Ubuntu (Ext4 partition) dual boot, with all my documents, pictures, etc in Windows. Normal usage for me is working in Ubuntu with files on the Windows partition. (reason for this set-up: Ubuntu can read NTFS while Windows cannot read Ext4, and I need Windows for e.g. Photoshop)
Now, I want to protect myself from making another stupid mistake in future. I want to protect specific essential Windows files, located on the NTFS partition, from editing when working in Ubuntu (installed on Ext4 partition).
I read the following on StackExchange security:
The file and folder/directory permissions on an operating system are managed and enforced by... you guessed it right, that operating system (OS). When the operating system is taken out of the picture (booting a different operating system), then those permissions become meaningless.
One way to think of it: You hire a big bodyguard (OS) to protect your house. You give him a list (permissions) of the allowed guests (users) and which areas (files and folders) they're allowed to visit. How useful are those lists when the bodyguard is asleep (not booting from that OS)?
Given the above, is it possible to protect myself? If so, how? Note that I'm just talking about protection in my own, current Ubuntu installation, not from new installations or live CDs.