SED Essential Training

Unlock the power of SED, the simple but powerful command line tool for extracting, transforming, and manipulating data in files and data streams.

Introduction

• Welcome
• What is sed?
• What you should know before watching this course
• Using the exercise files

1. Sed Command-Line Basics

• Using the most important sed command
• Understanding input, output, files, and pipes
• Quoting command-line arguments
• Modifying the "s" command

2. Regular Expressions

• Introducing regular expressions
• Using character classes and quantifiers
• Using & and \n

3. Sed Command-Line Flags

• Controlling printing with -n and the "p" modifier
• Specifying multiple commands with -e and -f
• Challenge: Change ten thousand men to one woman
• Solution: Change ten thousand men to one woman

4. More sed Commands

• Understanding addresses and address ranges
• Printing lines with "p"
• Deleting lines with "d"
• Reading and writing files with "r" and "w"
• Performing transformations with "y"
• Appending, inserting, and changing entire lines with "a", "i," and "c"
• Challenge: Write the main() function from array.c to file main.c
• Solution: Write the main() function from array.c to file main.c

5. Writing Programs in sed

• Grouping commands with "{" and "}"
• Getting the next line with "n"
• Exiting with "q" and "d"
• Commenting with "#"; debugging with "l" and "="

6. Advanced Programming Concepts

• Managing multi-line pattern space with "N", "D," and "P"
• Flow control with ":", "b," and "t"
• Managing the hold buffer with "g", "G", "h", "H," and "x"
• Challenge: Convert first three words of each line to all caps
• Solution: Convert first three words of each line to all caps

Goodbye

• Next steps