====== Ubuntu - Sudo - Sudo Warning Message ======

Enable the default warning message whenever "sudo" is used.

Edit **sudoers** file by typing:

<code bash>
sudo EDITOR=vim visudo
</code>

Add the following line near the other defaults:

<code>
Defaults lecture=always
</code>

<WRAP info>
**NOTE:**  Instead of **always** you can use **once** too.
</WRAP>

To make sure the syntax of the edited file is not incorrect, check it with the following command and look for **parsed: OK**.

<WRAP info>
**NOTE:**  If you mess up the syntax in this file, it can cause you problems using the "sudo" command.
</WRAP>

<code bash>
visudo -c
</code>

To customize the message, you can create a custom message file.

Edit the lecture file by typing:

<code bash>
touch /etc/lecture
chmod 644 /etc/lecture
vi /etc/lecture
</code>

Add the following text (which is default) or whatever you want:

<file>
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.
</file>

Now point to the newly-created file in the sudoers config file.

<code>
sudo EDITOR=vim visudo
</code>

<file>
Defaults lecture_file=/etc/lecture
</file>