I recently created a persistent Pendrive Ubuntu (12.04) using usb-creator-gtk.
It works like a charm and I personalized it to suit my needs.
My only complaint is that user 'ubuntu' keeps getting added to the sudoers file. 'ubuntu' ist the standard user, when using Live-Ubuntu. Thus initially it needed to be in sudoers.
However I created my own user and removed 'ubuntu' from sudoers using visudo. I also checked that /etc/sudoers is read only. Still once I reboot 'ubuntu' is again in /etc/sudoers just under my own user. Sometimes I even found it several times.
Furthermore using sudo does not initially require to enter a password. No matter what user is logged in. I managed to disable autologin editing (/etc/lightdm/lightdm.conf). But if someone is clever enought to switch to tty1-6, he still gets an automatically logged in ubuntu user with a free to use sudo.
Any ideas, how I can
a) permanetely keep 'ubuntu' out of sudoers (or delete the user alltogether, which also does not seem to work) and
b) make sudo initally require a password (and then save it for some minutes) like in a normal ubuntu installation
c) force ubuntu to also require login/password for the other text-only ttys.
Thank You!
vilwarin
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