During the course I will talk about the structure of finite-dimensional Lie algebras and their representation theory. We will classify simple finite-dimensional Lie algebras and superalgebras and their irreducible representations. I will explain all the results on thespecial linear Lie algebras and superalgebras. If I will have time I will explain some advanced properties of Lie superalgebras such as results of Brundan-Stroppel, Sergeev duality.