I am looking for a book about the Unix command-line toolkit (sh, grep, sed, awk, cut, etc.) that I read some time ago.  It was an excellent book, but I totally forgot its name.  The great thing about this specific book was the running example.  It showed how to implement a university bookkeeping system using only text-processing tools.  You would find a student by name with grep, update grades with sed, calculate average grades with awk, attach grades to IDs with cut, and so on.  If my memory serve, this book had a black cover, and was published circa 1980.Does anyone remember this book? I would appreciate any help in finding it.
Looking for an old classical Unix toolkit textbook
text processing;books