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...Lecture the shell and scripting in this unix simple scripts variables file system commands io redirection command line arguments evaluating expr predicates operators for testing strings ints files if then else while do loop writing exercises course we need to be familiar with use it whether bash csh tcsh zsh or other variants start stop processes control terminal otherwise interact many of you have heard made that is process providing instructions a interpreted programming language see what are working on first ssh into andrew cmu edu type echo will our particular does not fit classic definition useful features such as portability facilities resource intensive tasks recursion hashing sorting data structures like arrays hash tables direct access hardware good security but ways very powerful has functions conditionals loops support strong typing completely untyped everything string real power program doesn t come from itself diverse library can call upon any remains popular because provi...