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Full Discussion: delete lines matching a regular expression
Top Forums UNIX for Dummies Questions & Answers delete lines matching a regular expression Post 302604694 by birei on Monday 5th of March 2012 05:17:17 PM
Old 03-05-2012
Hi pathunkathunk,

This sed command will delete all lines that begin with a tab character. I think this is what you want, if I understood your question. And it should be very fast processing that big file.
Code:
$ sed '/^\t/ d' infile

EDIT to add the command that redirects output:
Code:
$ sed '/^\t/ d' infile >outfile

 

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LEARN ABOUT DEBIAN

gauche-cesconv

GAUCHE-CESCONV(1)						  Gauche Commands						 GAUCHE-CESCONV(1)

NAME

       gauche-cesconv - convert text from one character encoding scheme to another

SYNOPSIS

       gauche-cesconv [-h] [-f encoding] [-t encoding] [-o outfile] [infile]

DESCRIPTION

       The gauche-cesconv command is a program to convert text from one character encoding scheme (CES) to another, using Gauche's character
       conversion module.  Hence the supported character sets are the same as Gauche's.  See the info document of Gauche for more details.

       There are other commands that provide the same functionality and more, such as iconv(1) or nkf(1), but they are not universally available
       by default.  This command is provided for Gauche's external packages to ease the installation and configuration process; for those
       packages, it is certain that gauche-cesconv is available, so they don't need to check availability of iconv etc.

       When infile is omitted, the text is read from standard input.

OPTIONS

       -f, --from-code=encoding
	   Selects input encoding. Can be '*JP' to guess the character encoding from japanese text, among either ISO2022-JP(-1,2,3), EUCJP,
	   SHIFT_JIS or UTF-8.	If omitted, gauche's native CES is used.

       -h, --help
	   Show summary of options.

       -o, --output=outfile
	   Place output in file outfile. If omitted the converted text is written to standard output.

       -t, --to-code=encoding
	   Selects output encoding. (see also --from-code)

DIAGNOSTICS

       gauche-cesconv exits with status 0 on success.

SEE ALSO

       gauche-package(1), iconv(1)

       The program will be documented fully by the Gauche Developers' Reference available via the info(1) system.

AUTHORS

       Shiro Kawai <shiro@acm.org>
	   Author.

       Jens Thiele <karme@karme.de>
	   Wrote this manpage for the Debian system.

COPYRIGHT

       Copyright (C) 2010 Jens Thiele

       Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright
       notice and this notice are preserved. This file is offered as-is, without any warranty.

Gauche 0.9.1															 GAUCHE-CESCONV(1)
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