I'm haved created an account on ubuntu that is just a standard user but with no internet access. I have also removed 'recovery mode' from the grub menu so that one cannot just choose this option access root and reverse all my changes (maybe a safer option could have been passwording this rather than removing…), but this still leaves the option of simply booting into the liveCD/USB and being able to access the internet etc…
Is there a way to prevent a user being able to boot into liveCD environment?
Best Answer
You will need to do this in 2 steps,
Optionally, you could encrypt the root volume, so even booted from another media, one can find it hard to modify settings