Perl one-liners cookbook

Example based guide for text processing with perl from the command line.The book also includes exercises to test your understanding, which is presented together as a single file in this repo — https://github.com/learnbyexample/learn_perl_oneliners/blob/main/exercises/Exercises.mdFor solutions to the exercises, see Exercise_solutions.md.See Version_changes.md to keep track of changes made to the book.