Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Want to remove all lines but not latest 50 lines from a file Post 302867793 by prashant2507198 on Friday 25th of October 2013 04:34:36 AM
Old 10-25-2013
Want to remove all lines but not latest 50,000 lines from a file

Hi,

I have a huge file which has Lacs of lines. File system got full.

I want your guys help to suggest me a solution so that I can remove all lines from that file but not last 50,000 lines. I want solution which can remove lines from existing file so that I can have some space left with.

Last edited by prashant2507198; 10-25-2013 at 05:40 AM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

remove lines from file

file: 1 xxxxxxx 2 xxx xxx 5 xxx xxx ... 180 xxxxxx 200 xxx how to remove any lines with the first number range 1-180 (9 Replies)
Discussion started by: bluemoon1
9 Replies

2. Shell Programming and Scripting

To remove the lines in my file

Hi, There seems to some hack attempts in my site. I have attached the index page of my site and I need to remove the below lines from the index page. The below lines are at the center of the file. --> </style> <script>E V A L( unescape(... (5 Replies)
Discussion started by: gsiva
5 Replies

3. UNIX for Dummies Questions & Answers

vi to remove lines in file

All, I have a text file with several entries like below: personname personname.domain.com I know there is a way to use vi to remove only the personname.domain.com line. Can someone help? I believe that it involves /s/g/ something...I just can't remember the exact syntax. Thanks (2 Replies)
Discussion started by: kjbaumann
2 Replies

4. Shell Programming and Scripting

remove lines from file

Hi gurus, i'm trying to remove a number of lines from a large file using the following command: sed '1,5000d' oldfile > newfile Somehow the lines in the old file are not deleted... Am I doing this wrongly? Any suggestions? :confused: Thanks! :) wee (10 Replies)
Discussion started by: lweegp
10 Replies

5. Shell Programming and Scripting

remove : lines from file

A small question I have a test.txt file I have contents as: a:google b:yahoo : c:facebook : d:hotmail How do I remove the line with : my output should be a:google b:yahoo c:facebook d:hotmail (5 Replies)
Discussion started by: aronmelon
5 Replies

6. Shell Programming and Scripting

remove blank lines and merge lines in shell

Hi, I'm not a expert in shell programming, so i've come here to take help from u gurus. I'm trying to tailor a csv file that i got to make it work for the LOAD FROM command. I've a datatable csv of the below format - --in file format xx,xx,xx ,xx , , , , ,,xx, xxxx,, ,, xxx,... (11 Replies)
Discussion started by: dvah
11 Replies

7. Shell Programming and Scripting

Remove lines from file

Hey Gang- I have a list of servers. I want to exclude servers that begin with and end with certain characters. Is there an easy command to do this? Example wvm1234dev wvm1234pro uvm1122dev uvm1122bku uvm1344dev I want to exclude any lines that start with "wvm" OR "uvm" AND end... (7 Replies)
Discussion started by: idiotboy
7 Replies

8. Shell Programming and Scripting

Two files, remove lines from second based on lines in first

I have two files, a keepout.txt and a database.csv. They're unsorted, but could be sorted. keepout: user1 buser3 anuser19 notheruser27 database: user1,2343,"information about",field,blah,34 user2,4231,"mo info",etc,stuff,43 notheruser27,4344,"hiya",thing,more thing,423... (4 Replies)
Discussion started by: esoffron
4 Replies

9. Shell Programming and Scripting

Remove lines that are subsets of other lines in File

Hello everyone, Although it seems easy, I've been stuck with this problem for a moment now and I can't figure out a way to get it done. My problem is the following: I have a file where each line is a sequence of IP addresses, example : 10.0.0.1 10.0.0.2 10.0.0.5 10.0.0.1 10.0.0.2... (5 Replies)
Discussion started by: MisterJellyBean
5 Replies

10. Shell Programming and Scripting

awk to remove lines that do not start with digit and combine line or lines

I have been searching and trying to come up with an awk that will perform the following on a converted text file (original is a pdf). 1. Since the first two lines are (begin with) text they are removed 2. if $1 is a number then all text is merged (combined) into one line until the next... (3 Replies)
Discussion started by: cmccabe
3 Replies
DBD::Sponge(3)						User Contributed Perl Documentation					    DBD::Sponge(3)

NAME
DBD::Sponge - Create a DBI statement handle from Perl data SYNOPSIS
my $sponge = DBI->connect("dbi:Sponge:","","",{ RaiseError => 1 }); my $sth = $sponge->prepare($statement, { rows => $data, NAME => $names, %attr } ); DESCRIPTION
DBD::Sponge is useful for making a Perl data structure accessible through a standard DBI statement handle. This may be useful to DBD module authors who need to transform data in this way. METHODS
connect() my $sponge = DBI->connect("dbi:Sponge:","","",{ RaiseError => 1 }); Here's a sample syntax for creating a database handle for the Sponge driver. No username and password are needed. prepare() my $sth = $sponge->prepare($statement, { rows => $data, NAME => $names, %attr } ); o The $statement here is an arbitrary statement or name you want to provide as identity of your data. If you're using DBI::Profile it will appear in the profile data. Generally it's expected that you are preparing a statement handle as if a "select" statement happened. o $data is a reference to the data you are providing, given as an array of arrays. o $names is a reference an array of column names for the $data you are providing. The number and order should match the number and ordering of the $data columns. o %attr is a hash of other standard DBI attributes that you might pass to a prepare statement. Currently only NAME, TYPE, and PRECISION are supported. BUGS
Using this module to prepare INSERT-like statements is not currently documented. AUTHOR AND COPYRIGHT
This module is Copyright (c) 2003 Tim Bunce Documentation initially written by Mark Stosberg The DBD::Sponge module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. In particular permission is granted to Tim Bunce for distributing this as a part of the DBI. SEE ALSO
DBI perl v5.18.2 2013-06-24 DBD::Sponge(3)
All times are GMT -4. The time now is 11:17 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy