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sed, a stream editor

Table of Contents

1. Introduction
2. Invocation
3. sed Programs

3.1 Selecting lines with sed
3.2 Overview of Regular Expression Syntax
3.3 Where sed Buffers Data
3.4 Often-Used Commands
3.5 The s Command
3.6 Less Frequently-Used Commands
3.7 Commands for sed gurus
3.8 Commands Specific to GNU sed
3.9 GNU Extensions for Escapes in Regular Expressions

4. Some Sample Scripts

4.1 Centering Lines
4.2 Increment a Number
4.3 Rename Files to Lower Case
4.4 Print bash Environment
4.5 Reverse Characters of Lines
4.6 Reverse Lines of Files
4.7 Numbering Lines
4.8 Numbering Non-blank Lines
4.9 Counting Characters
4.10 Counting Words
4.11 Counting Lines
4.12 Printing the First Lines
4.13 Printing the Last Lines
4.14 Make Duplicate Lines Unique
4.15 Print Duplicated Lines of Input
4.16 Remove All Duplicated Lines
4.17 Squeezing Blank Lines

5. GNU sed's Limitations and Non-limitations
6. Other Resources for Learning About sed
7. Reporting Bugs
A. Extended regular expressions
Concept Index
Command and Option Index