cat (orig 'Cat') Copyright 1995, by Hewlett-Packard Company The code in this file is from the book "Shell Programming Examples" by Bruce Blinn, published by Prentice Hall. Command was found in the shbook archive. basename (basename-sh) Copyright 2004 Chris F.A. Johnson Command from Shell Scripting Recipes with modifications dirname (dirname-sh) Copyright 2004 Chris F.A. Johnson Command from Shell Scripting Recipes with modifications Most other code is by Gilbert Ashley Copyright 2007 cut I started with a pretty difficult one wc this provides a file/line/word/char indexer head tail head and tail are gutted from wc grep used tail for skeleton, adding stuff from wc/cut rev modfied from head/tail skeleton which is a modified version of 'search' from ShellDorado Author: Heiner Steven sort found a demo combsort algorithm written in BASH by Carl McNealy which modified nicely to do natural sorting of mixed lines