Chapter 2 - Shell Programming.first  -  A shell script that searches for files containing the word, "POSIX", and prints these files to screen.variable  -  A script that demonstrates the quoting rules for variables.try_var  -  A script that performs some simple variable manipulation using the environment and parameter variables._if  -  A script that asks a question and then uses an "if" statement to make a decision based on the answer.elif1  -  A modified version of _if. It reports an error message if the user types in anything other than "yes" or "no".elif2  -  An improved version of elif1.for1  -  A script that demonstrates a "for" loop.for2  -  A script that demonstrates a wildcard expansion in a "for" loop.for3  -  A script that prints a message 20 times using a "for" loop.while1  -  A script that asks a user for a password until the correct word is entered.while2  -  A less cumbersome version of for3 that uses a "while" loop._until  -  A script that watches for an unexpected user.case1  -  A revised version of elif2 which is a little more selective and forgiving of unexpected input. case2  -  An improved version of case1.case3  -  A reusable version of case2.and_list  -  A script that tests for the existence of files and echoes some text in between.or_list  -  Another script that tests for the existence of files and echoes some text in between.function  -  A script that demonstrates a shell function.local  -  A script that demonstrates a local variable within a shell function.my_name  -  A script that passes a parameter to a function._break  -  A script that shows how to break out of a loop by using a "break" statement.colon  -  A script that demonstrates the ":" command.cont1, cont2  -  Two scripts that demonstrate the "continue" command.classic, latest  -  Two scripts that demonstrate the "." command.export1, export2  -  Two scripts that show how to export variables._set  -  A scipt that sets the parameter variables of the shell._shift  -  A script that changes the position of the shell parameters._trap  -  A script that traps a signal._unset  -  A script that removes the foo variable from the shell environment.command.sh shows how to execute a command from within a script.arith  -  A script that performs simple arithmetic quickly.param  -  A script that demonstrates parameter matching operators.here1  -  A script that feeds input to the "cat" command.here2  -  A script that uses a here document to edit a file called "textfile".app/cd_db  -  A shell script that implements the CD Tile Database application.