According to one school of thought, mal'akhim are not commanded. They are made in a certain way. It's like asking about rocks being commanded to fall when you let go of them. (Near an object of significant mass, like the earth, etc...) The satan is a force in nature, or more correctly in metaphysics, that leads people astray. One that keeps us humans from being automata by making the choice between good and evil a real choice.
Yes, such forces, when "high" and abstract enough, are fit for personification. So we can talk about the satan as a "he" and talk about what "he wants". But that's like talking about a program "wanting" me to give it the right password. Angels aren't persons. They have no free will. They just do whatever the Creator "Programmed" them to do.
(See R' Saadia Gaon, Emunos veDei'os 4:14 as one example source from the Aristotelian side, and for a sample Qabbalist, Avodas haQodesh 3:5. Or the Meshekh Chokhmah on Bereishis 3:4, or Vayiqra 19:18.)
And so the satan isn't commanded anything. He's just doing what he's made to do.
There are other schools of thought, from saying that angels do have free will (discussed in this Mi Yodeya question: "Sources for free will of angels") to the middle ground -- that they have free will in principle, but in practice there are no choices for an angel to make. "Where" they exist, choosing right over wrong is obvious. (See the Rambam's Guide to the Perplexed 2:7.) As well as the possibility of fusing the two: Normally things are so clear to an angel there are no choices to be made, but when on a mission in our world, an angel can lose that clarity.
This possibility of free will that never has an opportunity to actually get excercized is exactly the kind of existence G-d made the satan to take us out of.