Title text: Proper User Policy apparently means Simon Says.
On a UNIX-type system, users can be assigned all kinds of rights, for example access to certain directories or files, executing certain commands etcetera. The “sudo” command overrides these policies by executing the command typed behind it as if the user were an administrator (the Super User) of the system. To prohibit abuse of the command, the user must be in the "sudoers" group, and the user first must type their password before the command will be executed (unless they've used "sudo" with other commands from the same terminal window, within the past few minutes).
In the comic, Cueball is demanding a sandwich from a friend. Not being properly asked, the friend denies the request. Cueball then (ab)uses the sudo command on the friend, which then has no choice but to go and make the sandwich, because Cueball has all rights. The title text refers to this abuse, noting that an administrator should set a proper use of the command in order to control his system.
Simon says is a children's game in which a leader gives various commands which must be followed by formal logic, prefixed with "Simon says". Wikipedia suggests "Simon" may be the powerful lord Simon de Montfort, or a corruption of Cicero, both of whom were influential politicians of their day.
- [Cueball is sitting on a couch, talking to a friend.]
- Cueball: Make me a sandwich.
- Friend: What? Make it yourself.
- Cueball: Sudo make me a sandwich.
- Friend: Okay.