Sponsored Content
Top Forums Shell Programming and Scripting Read n lines from a text files getting n from within the text file Post 302852979 by Chubler_XL on Thursday 12th of September 2013 10:34:27 PM
Old 09-12-2013
Good points Don Cragun, my assumption was that the value in the data line was less than then number of lines and any additional lines need to be discarded.

In my solution, any processing could be done in the NR <=R block:

Code:
awk -F: '/#data/ { R=NR+$2} NR<=R { "Any processing code here"; print }' infile

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

read list of filenames from text file and remove these files in multiple directories

I have a large list of filenames from an Excel sheet, which I then translate into a simple text file. I'd like to use this list, which contains various file extensions , to archive these files and then remove them recursively through multiple directories and subdirectories. So far, it looks like... (5 Replies)
Discussion started by: fxvisions
5 Replies

2. Shell Programming and Scripting

Read any lines of text from file

Witam wszystkich , Jest to moj pierwszy post i już prośba ale gdybym potrafił zaradzić problemowi to nie zawracałbym nikomu głowy . mianowicie : Mam jakis 'plik' w ktorym są osadzone pojedyncze i zmienne słowa po jednym w lini czyli : test1 tekttw resst .... itd. Moje... (6 Replies)
Discussion started by: versace
6 Replies

3. Shell Programming and Scripting

Shell script to read lines in a text file and filter user data

hi all, I have this file with some user data. example: $cat myfile.txt FName|LName|Gender|Company|Branch|Bday|Salary|Age aaaa|bbbb|male|cccc|dddd|19900814|15000|20| eeee|asdg|male|gggg|ksgu|19911216||| aara|bdbm|male|kkkk|acke|19931018||23| asad|kfjg|male|kkkc|gkgg|19921213|14000|24|... (4 Replies)
Discussion started by: srimal
4 Replies

4. Shell Programming and Scripting

[bash help]Adding multiple lines of text into a specific spot into a text file

I am attempting to insert multiple lines of text into a specific place in a text file based on the lines above or below it. For example, Here is a portion of a zone file. IN NS ns1.domain.tld. IN NS ns2.domain.tld. IN ... (2 Replies)
Discussion started by: cdn_humbucker
2 Replies

5. UNIX for Dummies Questions & Answers

Extracting lines from a text file based on another text file with line numbers

Hi, I am trying to extract lines from a text file given a text file containing line numbers to be extracted from the first file. How do I go about doing this? Thanks! (1 Reply)
Discussion started by: evelibertine
1 Replies

6. Shell Programming and Scripting

Read text between two lines containing a string

Hi, I have text file like the following: Start a b 121 c d End Start a 31 e f End Start p o i k (5 Replies)
Discussion started by: ysrini
5 Replies

7. Shell Programming and Scripting

Comparing 2 text files & downloading a file if the last lines are different

Hello I'm having a little difficulty in writing a shell script for a few simple tasks. First I have two files "file1.txt" and "file2.txt" and I want to read and compare the last line of each file. The files look like this. File1.txt File2.txt After comparing the two lines I would... (2 Replies)
Discussion started by: RustikGaming
2 Replies

8. Shell Programming and Scripting

Extracting lines from text files in folder based on the numbers in another file

Hello, I have a file ff.txt that looks as follows *ABNA.txt 356 24 36 112 *AC24.txt 457 458 321 2 ABNA.txt and AC24.txt are the files in the folder named foo1. Based on the numbers in the ff.txt file, I want to extract the lines from the corresponding files in the foo1 folder and... (2 Replies)
Discussion started by: mohamad
2 Replies

9. Shell Programming and Scripting

Read text between regexps and write into files based on a field in the text

Hi, I have a huge file that has data something like shown below: huge_file.txt start regexp Name=Name1 Title=Analyst Address=Address1 Department=Finance end regexp some text some text start regexp Name=Name2 Title=Controller Address=Address2 Department=Finance end regexp (7 Replies)
Discussion started by: r3d3
7 Replies

10. Shell Programming and Scripting

Match text to lines in a file, iterate backwards until text or text substring matches, print to file

hi all, trying this using shell/bash with sed/awk/grep I have two files, one containing one column, the other containing multiple columns (comma delimited). file1.txt abc12345 def12345 ghi54321 ... file2.txt abc1,text1,texta abc,text2,textb def123,text3,textc gh,text4,textd... (6 Replies)
Discussion started by: shogun1970
6 Replies
PTREPACK(1)						      General Commands Manual						       PTREPACK(1)

NAME
ptrepack - Copy any PyTables Leaf, Group or complete subtree into another file. SYNOPSIS
ptrepack -h -v -o -R start,stop,step --non-recursive --dest-title=title --dont-copyuser-attrs --overwrite-nodes --complevel=(0-9) --com- plib=lib --shuffle=(0|1) --fletcher32=(0|1) --keep-source-filters --upgrade-flavors --dont-regenerate-old-indexes sourcefile:sourcegroup destfile:destgroup DESCRIPTION
Copy any Leaf, Group or complete subtree from a PyTables file into another file. OPTIONS
A summary of options is included below. -h Prints a help text. -v Show more information. -o Overwite destination file. -R RANGE Select a RANGE of rows in the form start,stop,step during the copy of all the leaves. --non-recursive Do not do a recursive copy. Default is to do it. --dest-title=title Title for the new file (if not specified, the source is copied). --dont-copy-userattrs Do not copy the user attrs (default is to do it). --overwrite-nodes Overwrite destination nodes if they exist. Default is not to overwrite them. --complevel=(0-9) Set a compression level (0 for no compression, which is the default). --complib=lib Set the compression library to be used during the copy. lib can be set to "zlib", "lzo", "ucl" or "bzip2". Defaults to "zlib". --shuffle=(0|1) Activate or not the shuffling filter (default is active if complevel>0). --fletcher32=(0|1) Whether to activate or not the fletcher32 filter (not active by default). --keep-source-filters Use the original filters in source files. The default is not doing that if any of --complevel, --complib, --shuffle or --fletcher32 option is specified. --upgrade-flavors When repacking PyTables 1.x files, the flavor of leaves will be unset. With this, such a leaves will be serialized as objects with the internal flavor ("numpy" for 2.x series). --dont-regenerate-old-indexes Disable regenerating old indexes. The default is to regenerate old indexes as they are found. SEE ALSO
ptdump(1). These utilities are documented fully by PyTables user's manual. AUTHOR
This manual page was written by Francesc Altet <faltet@carabos.com>. July 7, 2007 PTREPACK(1)
All times are GMT -4. The time now is 05:24 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy