I really did some very stupid stuff.
I did a
sudo visudo and wanted to add the following line:
%admin ALL = NOPASSWD: /bin/tar
so users can execute
/bin/tar without the need to sudo.
But stupid me replaced the line
%admin ALL = (ALL)ALL
So basically that means I'm totally locked out. Everytime I try a
sudo visudo I get
"Sorry, user admin is not allowed to execute '/usr/sbin/visudo' as root on myhost"
I only can tar. Great.
Is there any way to get my root rights back?