Deleting lines in a file Post: 302119351

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deleting lines in a log file

Is there an easy way to delete the first so many lines in a log file? like I have a log file that has 10000 lines, i want to just get rid of the first 9000.

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Deleting last 2 lines from the file.

Hi I have a file & always I need to remove or delete last 2 lines from that file. So in a file if I have 10 lines then it should return me first 8 lines. Can someone help me?

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I have a file with 65 sets of 35 coordinates, and would like to isolate these coordinates so that I can easily copy the coordinates to another file. The problem is, I've got a 9 line header before each set of coordinates (so each set is 44 lines long). There are a zillion threads out there about...

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Deleting lines ending with . from a file

HI I'm looking to delete lines ending with .tk from below data file --------- abc.tk mgm.tk dtk mgmstk ------ I have written below code ---- sed '/.tk *$/d' dat_file.txt > temp.txt ---- But its deleting all the lines ending with tk. I need to delete only the lines ending .tk my...

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Deleting lines from a file

How I can delete 100 lines anywhere in a file without opening a file and without renaming the file.

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deleting lines from file

We have a server that logs transactions to a file. I want to write a script that will delete the first 50 lines of the file daily without renameing the file or moving the file.

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Good morning!!! Im a newbie with shell programing and i was wondering if there is a way to delete certain new lines from a file, here is an example of my current file: >seq_0 GTGAGATTGCTAATGAGCTGCTTTTAGGGGGCGTGTTGTGCTTGCTTTCC AACTTTTCTAGATTGATTCTACGCTGCCTCCAGCAGCCACCCCTCCCATC...

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Re: Deleting lines from big file.

Hi, I have a big (2.7 GB) text file. Each lines has '|' saperator to saperate each columns. I want to delete those lines which has text like '|0|0|0|0|0' I tried: sed '/|0|0|0|0|0/d' test.txt Unfortunately, it scans the file but does nothing. file content sample:...

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Deleting specific lines in a file

Hello, I have a file filled with dates, such as: 04-08-2011 message 04-08-2011 message 03-08-2011 message 01-08-2011 message 31-07-2011 message 24-07-2011 message 15-07-2011 message 13-12-2008 message 26-11-2007 message And I want to delete those lines whose date is older than 10...

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Deleting selected lines in a file

Hi Guys , I have two files say a1 and a2 having following contents a1 dag wfd a2 dag wfd chire hcm I want to delete only the lines in a2 which are in a1 and final output of a2 should be a2 chire hcm

LEARN ABOUT MINIX

pnmdepth

pnmdepth(1)                                                   General Commands Manual                                                  pnmdepth(1)

NAME

       pnmdepth - change the maxval in a portable anymap

SYNOPSIS

       pnmdepth newmaxval [pnmfile]

DESCRIPTION

       Reads a portable anymap as input.  Scales all the pixel values, and writes out the image with the new maxval.  Scaling the colors down to a
       smaller maxval will result in some loss of information.

       Be careful of off-by-one errors when choosing the new maxval.  For instance, if you want the color values to be five bits wide, use a  max-
       val of 31, not 32.

       One  important  use  of pnmdepth is to convert a new format 2-byte-per-sample PNM file to the older 1-byte-per-sample format.  Before April
       2000, essentially all raw (binary) format PNM files had a maxval less than 256 and one byte per sample, and many programs may rely on that.
       If  you  specify  a  newmaxval  less than 256, the resulting file should be readable by any program that worked with PNM files before April
       2000.

SEE ALSO

       pnm(5), ppmquant(1), ppmdither(1)

AUTHOR

       Copyright (C) 1989, 1991 by Jef Poskanzer.

                                                                   08 April 2000                                                       pnmdepth(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

deleting lines in a log file

Discussion started by: BG_JrAdmin

2. Shell Programming and Scripting

Deleting last 2 lines from the file.

Discussion started by: videsh77

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Deleting whole lines from a file

Discussion started by: red baron

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Deleting lines ending with . from a file

Discussion started by: shekhar_v4