UNIX Shells by Example is the world s #1 shell programming book, from the world s #1 shell programming instructor: Ellie Quigley. In UNIX Shells by Example, Fourth Edition, Quigley has thoroughly updated her classic and delivers the information today s shell programmers need most—including comprehensive coverage of Linux shell programming with bash!-UNIX Shells by Example is the world' s# 1 shell programming book, from the world' s# 1 shell programming instructor: Ellie Quigley. In UNIX Shells by Example, Fourth Edition, Quigley has thoroughly updated her classic and delivers the information today' s shell programmers need most- including comprehensive coverage of Linux shell programming with bash!