GNU SED awesome stream editor

Preface Prerequisites Conventions Acknowledgements Feedback and Errata Author info License Book version Introduction Installation Documentation and options overview Editing standard input Editing file input Cheatsheet and summary Exercises In-place file editing With backup Without backup Multiple files Prefix backup name Place backups in different directory Cheatsheet and summary Exercises Selective editing Conditional execution Delete command Print command Quit commands Multiple commands Line addressing Print only line number Address range Relative addressing n and N commands Cheatsheet and summary Exercises BRE/ERE Regular Expressions Line Anchors Word Anchors Alternation Grouping Matching the metacharacters Using different delimiters The dot meta character Greedy Quantifiers Character classes Escape sequences Backreferences Cheatsheet and summary Exercises Flags Case insensitive matching Changing case in replacement section Global replace Replace specific occurrences Print flag Write to a file Executing external commands Multiline mode Cheatsheet and summary Exercises Shell substitutions Variable substitution Command substitution Cheatsheet and summary Exercises z, s and f command line options NUL separated lines Separate files File as source of sed commands Cheatsheet and summary Exercises append, change, insert Basic usage Escape sequences Multiple commands Shell substitution Cheatsheet and summary Exercises Adding content from file r for entire file R for line by line Cheatsheet and summary Exercises Control structures Branch commands if-then-else loop Cheatsheet and summary Exercises Processing lines bounded by distinct markers Uniform markers Extracting first or last group Broken groups Summary Exercises Gotchas and Tricks Further Reading