To lecture sudo users about password usage on the system, use the lecture parameter as below.

It has 3 possible values:

• always – always lecture a user.
• once – only lecture a user the first time they execute sudo command (this is used when no value is specified)
• never – never lecture the user.

Defaults  lecture="always"

Additionally, a custom lecture file can be set with the lecture_file parameter.

Defaults  lecture_file="/path/to/file"