Having created a live Debian for a USB stick with 'make-live' using among
others the '--username usblive' option I noticed that the USB stick always
boots into the 'usblive' user account. And any command which require root
privileges are to be preceded by the 'sudo'.
Is this really a secure setup?
Why doesn't 'sudo' prompt for a root password?
How exactly was it configured so as not to even prompt for a password for the
normal user after bootup?
And how exactly was it configured so as not to have a root account?
Is all the magic done via the /etc/sudoers file only?