/etc/sudoers
Although it should be obvious, the last entries in the /etc/sudoers
file override whatever comes before. This means that if you are simply
trying to give yourself no-password-hassle sudo
access you better be
sure to put the following line after any %admin
or anything that
might override it.
%sudo ALL=(ALL:ALL) ALL
...
rwxrob ALL=(ALL:ALL) NOPASSWD: ALL