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Full Discussion: using sed but want to drop last line
Top Forums Shell Programming and Scripting using sed but want to drop last line Post 302278610 by atc98092 on Tuesday 20th of January 2009 04:17:32 PM
Old 01-20-2009
Question using sed but want to drop last line
Howdy all. I have some scripts that read a text file looking for a keyword, then returning all the text until another keyword and puts it into a new file. Problem is, sed returns the entire last line that contains the 2nd keyword, and I don't want it! Here's an example of the sed script line:

sed -n "/WX: /,/[0-2][0-9][0-5][0-9] TMU/P " 15.txt > test1.txt

and here's what it returns:

1911 TMU WX: 1900 1/15-2300 1/15 PAZA SIGMET INDIA 9 FOR SEVERE HD
TURBULENCE BELOW 100 WI AN AREA 20NM NW BGQ TO 40NM E BGQ TO
50NM E ENA TO 10NM W ENA TO 20NM NW BGQ. FWD: DCC,A11
2000 TMU Rick Bartow (IR) On duty position TMU

The blue line is what I don't want. It is a separate entry that does not apply to the previous entry. I can't use grep, because it only gives me the first line of the entry, and each entry can vary in length, so I can't use a line count. These scripts are on Red Hat Enterprise 3 workstations, and I am not allowed to install anything that isn't already on them, so whatever scripting language is already there is all I can use.Smilie

The next entry will always start with the date (4 digit), 4 spaces, then the word TMU. There is no other constant for the next entry. Is there any switch to sed or perhaps another command that will get the text I want but stop on the 2nd keyword, or some other way to strip the last line?

I run the same script line multiple times with different beginning keywords so I can group them together into a single report.

I should also mention that each file I am searching could have multiple entries with the same keyword. sed pulls them all in perfectly, except for the extra line from each entry. Any ideas???

Thanks!!! Smilie
 

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LEARN ABOUT DEBIAN

gchem3d

GCHEM3D(1)						       gnome-chemistry-utils							GCHEM3D(1)

NAME

       gchem3d - a small chemical viewer application

SYNOPSIS

       gchem3d [OPTION(S)...] [FILE...]

DESCRIPTION

       gchem3d is a small chemical viewer application, which can show several chemical file formats.

OPTIONS

       The following options are accepted:

       -b COLOR, --bgcolor=COLOR
	   Use the given color as background color.  COLOR can be one of "black" (default), "white", "#rrggbb" (don't forget to escape the "#"
	   character in the shell).

       -d MODEL, --display3d=MODEL
	   Choose how molecules are displayed.	MODEL can be one of "BallnStick" (default), "SpaceFill".

       -?, --help
	   Show application help options.

       --help-all, --help-*
	   Print all or just a group of help options. These options are not documented here. Instead see gtk-options(7) and gnome-options(7).

       -v, --version
	   Print gchem3d version information.

SEE ALSO

       gnome-options(7), gtk-options(7)

AUTHORS

       Jean Brefort <jean.brefort@normalesup.org>
	   Program author.

       Daniel Leidert <daniel.leidert@wgdd.de>
	   Manpage author.

COPYRIGHT

       Copyright (C) 2002-2007 Jean Brefort
       Copyright (C) 2004-2007 Daniel Leidert

       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or any
       later version published by the Free Software Foundation.

gcu 0.12				      $Date: 2009-03-19 10:53:47 +0100 (jeu. 19 mars 2009) $					GCHEM3D(1)
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