Deleting last records of a file


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Deleting last records of a file
# 8  
Old 08-05-2009
Code:
awk 'FNR==NR{c++;next}FNR<(c-7){print}' file file

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Separate records of a file on 2 types of records

Hi I am new to shell programming in unix Please if I can provide help. I have a file structure of a header record and "N" detail records. The header record will be the total number of detail records I need to split the file in 2: One for the header Another for all detail records Could... (1 Reply)
Discussion started by: jamcogar
1 Replies

2. Shell Programming and Scripting

Deleting the records based on the condition

Hi, Can any one help me, in deleting the records from the database table based on the following condition: script should take a configurable parameter as input. The input is nothing but “no. of years”. For example, if I enter 2 as input parameter, then the 2 year old records should get... (2 Replies)
Discussion started by: zxcjggu708
2 Replies

3. UNIX for Dummies Questions & Answers

Deleting records from .dat file

Hi, I need to delete one row from a .dat file. error processing column PCT_USED in row 1053295 for datafile /exp/stats/ts_stats.dat ORA-01722: invalid number This is used to load records using sql loader. Please let me know the procedure to do it. Regards, VN (3 Replies)
Discussion started by: narayanv
3 Replies

4. Shell Programming and Scripting

Perl : Deleting the records in the excel sheet

I have a excel sheet with contains the records as below.. also uploaded the input excelsheet and the output excel sheet(expected output). 322mpls32.net.xyz.comBW: 44.0 M Hrly Avg (IN /... (1 Reply)
Discussion started by: giridhar276
1 Replies

5. Shell Programming and Scripting

Deleting duplicate records from file 1 if records from file 2 match

I have 2 files "File 1" is delimited by ";" and "File 2" is delimited by "|". File 1 below (3 record shown): Doc1;03/01/2012;New York;6 Main Street;Mr. Smith 1;Mr. Jones Doc2;03/01/2012;Syracuse;876 Broadway;John Davis;Barbara Lull Doc3;03/01/2012;Buffalo;779 Old Windy Road;Charles... (2 Replies)
Discussion started by: vestport
2 Replies

6. UNIX for Dummies Questions & Answers

Grep specific records from a file of records that are separated by an empty line

Hi everyone. I am a newbie to Linux stuff. I have this kind of problem which couldn't solve alone. I have a text file with records separated by empty lines like this: ID: 20 Name: X Age: 19 ID: 21 Name: Z ID: 22 Email: xxx@yahoo.com Name: Y Age: 19 I want to grep records that... (4 Replies)
Discussion started by: Atrisa
4 Replies

7. Shell Programming and Scripting

Deleting Duplicate Records

Hello, I'm have a file of xy data with over 1000 records. I want to delete both x and y values for any record that has the same x value as any previous record thus removing the duplicates from my file. Can anyone help? Thanks, Dan (3 Replies)
Discussion started by: DFr0st
3 Replies

8. Shell Programming and Scripting

deleting multiple records from a huge file at one time

I have a very big file of 5gb size and there are about 50 million records in there. I have to delete the records based on recrord number that I know fromoutside with out opening the file. The record numbers are very random like 5000678, 7890005 etc. Can somebody let me know how i can... (5 Replies)
Discussion started by: dsravan
5 Replies

9. Shell Programming and Scripting

Count No of Records in File without counting Header and Trailer Records

I have a flat file and need to count no of records in the file less the header and the trailer record. I would appreciate any and all asistance Thanks Hadi Lalani (2 Replies)
Discussion started by: guiguy
2 Replies

10. UNIX for Dummies Questions & Answers

deleting records with a missing field

I had to delete rows when a record was missing a field. My solution was cut -c 202-402 ${dataFile} | awk '{if (substr($0,103,30) !~ /^ *$/) print $0} >> ${workFile} The cut is because they came two records to a row. Anyone want to offer a more elegant solution? (2 Replies)
Discussion started by: gillbates
2 Replies
Login or Register to Ask a Question
CHECKBASHISMS(1)					      General Commands Manual						  CHECKBASHISMS(1)

NAME
checkbashisms - check for bashisms in /bin/sh scripts SYNOPSIS
checkbashisms script ... checkbashisms --help|--version DESCRIPTION
checkbashisms, based on one of the checks from the lintian system, performs basic checks on /bin/sh shell scripts for the possible presence of bashisms. It takes the names of the shell scripts on the command line, and outputs warnings if possible bashisms are detected. Note that the definition of a bashism in this context roughly equates to "a shell feature that is not required to be supported by POSIX"; this means that some issues flagged may be permitted under optional sections of POSIX, such as XSI or User Portability. In cases where POSIX and Debian Policy disagree, checkbashisms by default allows extensions permitted by Policy but may also provide options for stricter checking. OPTIONS
--help, -h Show a summary of options. --newline, -n Check for "echo -n" usage (non POSIX but required by Debian Policy 10.4.) --posix, -p Check for issues which are non POSIX but required to be supported by Debian Policy 10.4 (implies -n). --force, -f Force each script to be checked, even if it would normally not be (for instance, it has a bash or non POSIX shell shebang or appears to be a shell wrapper). --extra, -x Highlight lines which, whilst they do not contain bashisms, may be useful in determining whether a particular issue is a false posi- tive which may be ignored. For example, the use of "$BASH_ENV" may be preceded by checking whether "$BASH" is set. --version, -v Show version and copyright information. EXIT VALUES
The exit value will be 0 if no possible bashisms or other problems were detected. Otherwise it will be the sum of the following error val- ues: 1 A possible bashism was detected. 2 A file was skipped for some reason, for example, because it was unreadable or not found. The warning message will give details. SEE ALSO
lintian(1). AUTHOR
checkbashisms was originally written as a shell script by Yann Dirson <dirson@debian.org> and rewritten in Perl with many more features by Julian Gilbey <jdg@debian.org>. DEBIAN
Debian Utilities CHECKBASHISMS(1)