  Necessary and sufficient conditions of orthogonality of left (right) linear
(alinear) quasigroups in various combinations are given. As corollary we obtain
conditions of parastroph orthogonality of left (right) linear (alinear)
quasigroups. Any linear (alinear) quasigroup over the symmetric group S_n
($n\neq 2; 6$) is not orthogonal to its (12)-parastrophe.
