Grep matched records from huge file Post: 302338872

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

sed, grep, awk, regex -- extracting a matched substring from a file/string

Ok, I'm stumped and can't seem to find relevant info. (I'm not even sure, I might have asked something similar before.): I'm trying to use shell scripting/UNIX commands to extract URLs from a fairly large web page, with a view to ultimately wrapping this in PHP with exec() and including the...

2. 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...

3. Shell Programming and Scripting

grep all records in a file and get a word count -perl

Hi, I have a file .. file.txt .. i need to get a total record count in the files into a $variable.. im using perl script thanks

4. UNIX for Dummies Questions & Answers

Parsing out records from one huge record

Hi, I have one huge record and know that each record in the file is 550 bytes long. How do I parse out individual records from the single huge record. Thanks,

5. 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...

6. HP-UX

Performance issue with 'grep' command for huge file size

I have 2 files; one file (say, details.txt) contains the details of employees and another file (say, emp.txt) has some selected employee names. I am extracting employee details from details.txt by using emp.txt and the corresponding code is: while read line do emp_name=`echo $line` grep -e...

7. Shell Programming and Scripting

Grep records out of file

Hi, I have a file where there "Tab" seperated values are present.I need to identify duplicate entries based on column 1 & 6 only . For e.g : I tried using uniq ..but the output is only having one duplicate entry, instead of both the entries.I need both the above entries . uniq -f5...

8. UNIX for Dummies Questions & Answers

What is the faster way to grep from huge file?

Hi All, I am new to this forum and this is my first post. My requirement is like to optimize the time taken to grep the file with 40000 lines. There are two files FILEA(40000 lines) FILEB(40000 lines). The requirement is like this, both the file will be in the format below...

9. Shell Programming and Scripting

Extract Matched Records from XML

Hi All, I have a requirement to extract para in XML file on the basis of another list file having specific parameters. I will extract these para from XML and import in one scheduler tool. file2 <FOLDER DATACENTER="ControlMserver" VERSION="800" PLATFORM="UNIX" FOLDER_NAME="SH_AP_INT_B01"...

10. Shell Programming and Scripting

How to fetch matched records from files between two different directory?

awk 'NR==FNR{arr;next} $0 in arr' /tmp/Data_mismatch.sh /prd/HK/ACCTCARD_20160115.txt edit by bakunin: seems that one CODE-tag got lost somewhere. i corrected that, but please check your posts more carefully. Thank you.

LEARN ABOUT DEBIAN

mdraw_default_line_break

mdraw_default_line_break(3m17n) 				 The m17n Library				   mdraw_default_line_break(3m17n)

NAME

       mdraw_default_line_break - Calculate a line breaking position.

SYNOPSIS

       int mdraw_default_line_break (MText * mt, int pos, int from, int to, int line, int y)

DESCRIPTION

       Calculate a line breaking position. The function mdraw_default_line_break() calculates a line breaking position based on the line number
       line and the coordinate y, when a line is too long to fit within the width limit.  pos is the position of the character next to the last
       one that fits within the limit.	from is the position of the first character of the line, and to is the position of the last character
       displayed on the line if there were not width limit.  line and y are reset to 0 when a line is broken by a newline character, and
       incremented each time when a long line is broken because of the width limit.

RETURN VALUE

	   This function returns a character position to break the line.

COPYRIGHT

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License
       <http://www.gnu.org/licenses/fdl.html>.

Version 1.6.2							    12 Jan 2011 				   mdraw_default_line_break(3m17n)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

sed, grep, awk, regex -- extracting a matched substring from a file/string

Discussion started by: ropers

2. Shell Programming and Scripting

deleting multiple records from a huge file at one time

Discussion started by: dsravan

3. Shell Programming and Scripting

grep all records in a file and get a word count -perl

Discussion started by: meghana

4. UNIX for Dummies Questions & Answers

Parsing out records from one huge record

Discussion started by: bwrynz1