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Lie algebras in positive characteristic (not necessarily restricted Lie algebras)

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Automorphisms of Lie algebra of type $A_5$ modulo its center in characteristic 2

Let $L$ be classical Lie algebra of type $A_5$ over field of characteristic 2; let $M$ be the quotient $L/Z(L)$ modulo its center $Z(L)$. What about the group of automorphisms of M? Does anybody kno …