sed, a stream editor

This file documents version 4.1.5 of GNU sed, a stream editor.

This document is released under the terms of the GNU Free Documentation License as published by the Free Software Foundation; either version 1.1, or (at your option) any later version.

You should have received a copy of the GNU Free Documentation License along with GNU sed; see the file ‘COPYING.DOC’. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02110-1301, USA.

There are no Cover Texts and no Invariant Sections; this text, along with its equivalent in the printed manual, constitutes the Title Page.


1. Introduction
2. Invocation
3. `sed` Programs		`sed` programs
4. Some Sample Scripts		Some sample scripts
5. GNU `sed`'s Limitations and Non-limitations		Limitations and (non-)limitations of GNU `sed`
6. Other Resources for Learning About `sed`		Other resources for learning about `sed`
7. Reporting Bugs		Reporting bugs
A. Extended regular expressions		`egrep`-style regular expressions

Concept Index		A menu with all the topics in this manual.
Command and Option Index		A menu with all `sed` commands and command-line options.
--- The detailed node listing --- sed Programs:
3.1 How `sed` Works		How `sed` works
3.2 Selecting lines with `sed`
3.3 Overview of Regular Expression Syntax		Overview of regular expression syntax
3.4 Often-Used Commands		Often used commands
3.5 The `s` Command		`sed`'s Swiss Army Knife
3.6 Less Frequently-Used Commands		Less frequently used commands
3.7 Commands for `sed` gurus
3.8 Commands Specific to GNU `sed`		Commands specific of GNU `sed`
3.9 GNU Extensions for Escapes in Regular Expressions		Specifying special characters
Examples:
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		Reverse lines of files
4.7 Numbering Lines		Numbering lines
4.8 Numbering Non-blank Lines		Numbering non-blank lines
4.9 Counting Characters		Counting chars
4.10 Counting Words		Counting words
4.11 Counting Lines		Counting lines
4.12 Printing the First Lines		Printing the first lines
4.13 Printing the Last Lines		Printing the last lines
4.14 Make Duplicate Lines Unique		Make duplicate lines unique
4.15 Print Duplicated Lines of Input		Print duplicated lines of input
4.16 Remove All Duplicated Lines		Remove all duplicated lines
4.17 Squeezing Blank Lines		Squeezing blank lines

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