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Newsgroups: alt.comp.editors.batch,comp.editors,comp.answers,alt.answers,news.answersSubject: sed FAQ, version 015Followup-To: posterSummary: Frequently Asked Questions about sed, the stream editorX-Disclaimer: Approval for *.answers is based on form, not contentArchive-Name: editor-faq/sedPosting-Frequency: irregularLast-modified: 10 March 2003Version: 015URL: http://sed.sourceforge.net/sedfaq.htmlMaintainer: Eric PementTHE SED FAQFrequently Asked Questions aboutsed, the stream editorCONTENTS1. GENERAL INFORMATION1.1. Introduction - How this FAQ is organized1.2. Latest version of the sed FAQ1.3. FAQ revision information1.4. How do I add a question/answer to the sed FAQ?1.5. FAQ abbreviations1.6. Credits and acknowledgements1.7. Standard disclaimers2. BASIC SED2.1. What is sed?2.2. What versions of sed are there, and where can I get them?2.2.1. Free versions2.2.1.1. Unix platforms2.2.1.2. OS/22.2.1.3. Microsoft Windows (Win3x, Win9x, WinNT, Win2K)2.2.1.4. MS-DOS2.2.1.5. CP/M2.2.1.6. Macintosh v8 or v92.2.2. Shareware and Commercial versions2.2.2.1. Unix platforms2.2.2.2. OS/22.2.2.3. Windows 95/98, Windows NT, Windows 20002.2.2.4. MS-DOS2.3. Where can I learn to use sed?2.3.1. Books2.3.2. Mailing list2.3.3. Tutorials, electronic text2.3.4. General web and ftp sites3. TECHNICAL3.1. More detailed explanation of basic sed3.1.1.Regular expressions on the left side of "s///"3.1.2.Escape characters on the right side of "s///"3.1.3.Substitution switches3.2. Common one-line sed scripts. How do I . . . ?- double/triple-space a file?- convert DOS/Unix newlines?- delete leading/trailing spaces?- do substitutions on all/certain lines?- delete consecutive blank lines?- delete blank lines at the top/end of the file?3.3. Addressing and address ranges3.4. Address ranges in GNU sed and HHsed3.5. Debugging sed scripts3.6. Notes about s2p, the sed-to-perl translator3.7. GNU/POSIX extensions to regular expressions4. EXAMPLESONE-CHARACTER QUESTIONS4.1.How do I insert a newline into the RHS of a substitution?4.2.How do I represent control-codes or non-printable characters?4.3.How do I convert files with toggle characters, like +this+,to look like [i]this[/i]?CHANGING STRINGS4.10. How do I perform a case-insensitive search?4.11. How do I match only the first occurrence of a pattern?4.12. How do I parse a comma-delimited (CSV) data file?4.13. How do I handle fixed-length, columnar data?4.14. How do I commify a string of numbers?4.15. How do I prevent regex expansion on substitutions?4.16. How do I convert a string to all lowercase or capital letters?CHANGING BLOCKS (consecutive lines)4.20. How do I change only one section of a file?4.21. How do I delete or change a block of text if the block containsa certain regular expression?4.22. How do I locate a paragraph of text if the paragraph contains acertain regular expression?4.23. How do I match a block of specific consecutive lines?4.23.1.Try to use a "/range/, /expression/"4.23.2.Try to use a "multi-line\nexpression"4.23.3.Try to use a block of "literal strings"4.24. How do I address all the lines between RE1 and RE2, excluding the lines themselves?4.25. How do I join two lines if line #1 ends in a [certain string]?4.26. How do I join two lines if line #2 begins in a [certain string]?4.27. How do I change all paragraphs to long lines?SHELL AND ENVIRONMENT4.30.How do I read environment variables with sed ...4.31.1.... on Unix platforms?4.31.2.... on MS-DOS or 4DOS platforms?4.32.How do I export or pass variables back into the environment ...4.32.1.... on Unix platforms?4.32.2.... on MS-DOSsed '1~3d' file

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