The thing is, if someone has physical access to your machine, they've 
pretty much bypassed 99% of any security measures you have. This is not 
new and not unknown; most people simply ignore that because who's going to 
go into your house with a USB stick just to boot your computer?

That said, there are many ways to block this. You can have a boot password 
right in the BIOS. Then nobody can boot your machine. You can also block 
booting from CD or USB in the BIOS and put a password on the BIOS setup.

Course, that means someone can just steal your harddrive and plug that 
into another computer. This is where full-disk ecryption comes in.

If that's too much for you, most Linux distros will let you encrypt your 

On Wed, 13 Sep 2017, Rick Engebretson wrote:

> As I play around backing up, upgrading, and what-not, I use 
> not-so-hotswappable hard disk drives. Sometimes I goof up and have a bad 
> /etc/fstab file and the system will hang at boot. In older distros there were 
> some instructions to boot to root and use "mc" to edit /etc/fstab. This newer 
> opensuse distro had me stumped how to just get the filesystem going.
> So I tried the Fedora Live DVD and booted to DVD, mounted the boot hard drive 
> in KDE "dolphin" file manager, opened the KDE editor "kwrite," edited and 
> saved the system file /etc/fstab, and rebooted the opensuse hard drive smooth 
> as silk.
> I might be wrong, but these Linux Live DVDs seem to open a giant security 
> hole.
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