Which file lists which users can execute commands using sudo?
(Provide the full path and filename)
Answer: /etc/sudoers
Explanation:
From the man pages:
The sudoers file is composed of two types of entries: aliases (basically variables) and user specifications (which specify who may run what). When multiple entries match for a user, they are applied in order. Where there are multiple matches, the last match is used (which is not necessarily the most specific match).