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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
01-20-2009
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.
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!!!
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.
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!!!
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