Hahn, Harley Harley Hahn's guide to Unix and Linux Harley Hahn - Boston McGraw-Hill Higher Education c2009. - xxxiv, 926p. : ill. (some col.) 23 cm. ISBN: 9780071283977 Subjects--Uniform Titles: Unix (Computer file)LinuxOperating systems (Computers) LC Class. No.: RNF QA 76.76 U5 H34 2009