Programming :: Deleting Rows From Text File In Perl?

Jun 21, 2010

How can I delete rows into text file in perl?

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Programming :: Delete - Selected Rows In Perl / CGI?

Apr 6, 2010

How can I delete selected rows of a table in perl/CGI??

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Programming :: Ngram Text File Using Perl?

Mar 6, 2011

I have a few problem. I have txt file like this:Quote:00 21 55 84 9a ff 00 1f 9e 1a 5b 00 08 00 45 00 00 4b 00 00 40 00 3f 11 9a 0e a1 8b fa 02 04 02Then, based on my txt file, I would like to generate text like this:Quote:00215584 2155849a 55849aff 849aff00 9aff001f ff001f9e 001f9e1a 1f9e1a5b 9e1a5b00 1a5b0008 5b000800 00080045 08004500 00450000 00004b00 004b0000 4b000040 00004000 0040003f 40003f11 003f119a 3f119a0e 119a0ea1 9a0ea18b 0ea18bfa a18bfa02ased in my reading, I found about ngram solution in perlbut I not really understand to edit from source code given. I m begineer user in programming language. I hope to get the solution. [URL]

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Programming :: Get Data From Multi Lined Text File Using Awk / Sed Or Perl - Grep And Cut Not Upto Par?

Jul 1, 2010

I need a loop that pulls out the user name into a variable and then pulls out the LastUpdate field into another variable so I can then perform a comparison against the last update field. Requirements are AIX tools including AWK, SED and Perl I am writing a script to check AIX users password expiration dates and if they are within the alerting period (ie. 7 days etc) it will email the user. I will release the full script into the public domain once completed. The text file I want to parse is formatted like:

Code:

colettel:
password = XSON0m4SdIQDw
lastupdate = 1260829398
andrewwa:

[code].....

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Programming :: Perl - Delete Line From Text File With Duplicate Match At Beginning Of Line

Apr 1, 2009

Was wondering if any perl guru's could help me with a quick log file adjustment. I have a text file that looks like so (tabs and newlines are revealed so you can see what separates the data):

There are maybe 100 lines of text in this file at any given time. I need to delete all duplicate lines only looking at the first bit of text prior to the first tab. It doesn't matter which one gets deleted as long as there are no two lines that begin with that same text at the beginning before the first tab. So in this example, either the fist line "1234" or the last line "1234" would need to be deleted. I already have code in my script that opens the files - I just need the code to read the text into an array and the part that would find matches based on the above criteria, and make the deletions.

If it would be easier, I can even do a system call and use SED (v4.1.5) and/or AWK (3.1.5) instead.

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Software :: Deleting All Instances Of A Certain Character From A Text File?

Feb 18, 2010

In my command prompt I did:

Code:

sed 's/://' mytextfile > newtextfile

But it only deleted the first instance of : in each line when some lines have multiple : appearing in each one. How can I delete all the : from the entire file?

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Red Hat / Fedora :: Convert Plain Text File To Html File Without Using Perl?

Jun 9, 2010

I am looking for some source package which will convert plain text file to html file without using perl.

I mainly need to do this on an ARM platform, so if I get sources I can cross compile it.

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Programming :: Easier Way To Color Text In Perl Like BASH?

Apr 8, 2010

I've been trying to figure out a way to more easily color text in Perl like I do on Bash on a Linux box. In bash, what I'll do is set color variables up to equal the escape sequence, then echo out with escape seqeunces to print it exactly how I want it. Typically I'll want a character or a word in a different color, not the whole line. For example

echo -n -e "My face is turning ${RED}red${UNCOLOR} like a lobster." In Perl with the term::ANSIColor module, it seems to just do a line. Am I being dense? Is there a way that I can do it like I do it in BASH that's fairly easy to read after the fact?

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General :: Perl Script To Replace The Number From Text File?

Jun 21, 2010

on creating a new perl script which replace IP address from the text file. eg. If in a file, we found any word like 11.222.333.44 then it has to be replaced to XX.XXX.333.44

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Programming :: Remove Lines In A Text File Based On Another Text File?

Jan 28, 2009

I have a text file called file1.txt containing many lines eg.

line1
line2
line3
line4
line5
line6

Then i have another text file called file2.txt contains

3
5
6

Is there a command to remove the lines in file1.txt based on the keywords in file2.txt? note: It should remove line3,line5,line6 based on 3,5,6

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Programming :: Deleting Unwanted Characters In File

Mar 31, 2010

Currently, I'm working on personal project. and I'm kinda stuck. What I want to do is that open a file, and edit that file (deleting unwanted characters). The problem arises after I deleted unwanted characters, the file still has the same length of the original one. Let's assume that we have a file with "1234" in it. I deleted "3" ( I overwrite "\0" ) so now when I check the file, it's 124. But when I check the length, the both have the same size as 4

Here is an example source code
int length, length2;
num = open("a.dat", 2)
length = lseek(num, 0, 2); // Initial length
lseek(num, 2, 0); // editing
write(num, "\0", 1);
length2 = lseek(num, 0, 2); // Final length
close(num);

When I print those values those are exactly the same. Length2 should be one less than length, but the both are 4. What's wrong in m code? Am I supposed to use different character rather than "\0"?

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Programming :: Adding Lines Of Text To Beginning Of Text File

Jan 19, 2009

I need to insert 3-4 lines of text to the beginning of a text file. The file is a largish MYSQL dump, the result of a backup shell script. This shell script should insert the required text.I've wrestled with sed, but lost.

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Programming :: Delete Line Of Text From Text File Via Shell?

Jan 13, 2010

I have to delete a certain line of text from the a textfile via ubuntu's shell scripting.I have done research, and it seems that most people advocate the usage of sed /d option. sed makes does not edit the text file. Hence, most options I discovered involved the use of a temporary variable/textfile and then overwriting the old file with the temporary new file. Is there anyway whereby I can bypass the use of temporary storage containers? I hope there is any magical combination of commands to edit the file directly.

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Programming :: Exporting Glade Text View To Text File?

Jan 8, 2011

I want to display something in my text view widget in glade using c code. that's all right.
now I need to attach a save button beneath the text view.so that on click the text view content should save as a txt file..

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Programming :: Formatting Fields And Text Being Displayed From Text File?

Feb 9, 2011

I want to display the contents of a particular log file (simple text file, I mean in Linux). But there is a problem: The contents need to be organized in a fixed format. Have a look at this log file:

sampleLog.txt

Code:

User Name: XYZ
Reported Problems Description: Blah! Blah! Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah!

[code]....

So, while displaying the contents of above file on a web page, I want to format the field names found in the log file: User Name:, Reported Problems Description:, and Remarks:. These fields may contain a variable length of text and no specific line number is assumed for them to appear on.

The desired output should look like this:

User Name: XYZ
Reported Problems Description: Blah! Blah! Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah! Blah!Blah!

[code]....

Well, what I am trying to do may sound wierd to some of you. The filed "Reported Problems Description:" can possible contain text which embeds colon (.

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Programming :: Deleting Lines From A File With Specific Pattern Using AWK?

Jun 6, 2010

I have a file which contains milion of records. It contains 12 columns seperated by "||" (delimeter).

First two fields contain first name and last name of a person. Now my requirement is to delete all those records from this file for which:

First two fields does not contain any alphabet.

For e.g i have below mentioned records in file:

gaurav||gandhi||123||456||789
#a%bcd||123abc||89|90||91
12345||@@@||89||123||234
***||!!!!||98||76||90

Now, last two lines should be removed from this file since first two fields does not contain any alphabet for these two records.

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Programming :: Deleting Multiple Lines Above And Below Expression In File

May 19, 2010

I have a very, very large log file (360MB) that I'm trying to thin out. As it turns out the majority of this file has entries that aren't necessary so I'm attempting to build a command that will strip these out. The following command works to display only the data that I do not want:

Code:
cat xml_results.log | grep -B 6 -A 5 "YYY ZZZ"

This displays exactly the data I want to delete from the file by displaying the expression and six lines above it and five lines below it. However I'm at a loss as to how to remove this data from the output and display everything else. I looked into the -v option with grep redirecting the output to a new file:

Code:
cat xml_results.log | grep -B 6 -A 5 -v "YYY ZZZ" > xml_filtered_results.log

However it doesn't work, the new file is the same size as the old one. What am I doing wrong? Is there a better method of doing this? I'm a bit out of my element since the method I'd normally use can't handle files of this size.

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Programming :: Add Text Before Line Number In Text File?

May 3, 2010

a sed command to add a text before line number in text file? I have text file with 500 lines, and i want to add 3 more lines with text after line 300, OR before line 302, isn't no problem.

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Programming :: Perl Find File And Then Replace String In File

Jul 28, 2009

I have script that I'm working on that updates a username in all the files that are called blah.inc for my framework. since i host a bunch of these web apps i need to do it to all of them. so I need to figure out how to update these files automagically with out me watching it to call vim every time. heres what I have so far

Code:

This finds the files but now i need to figure out how to do s/bob/fred/g on those files.

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Programming :: Split A File To Multiple File Using Awk Or Perl?

Feb 27, 2011

I have a single file that contain multi-text something likes this:

Quote:

No. Time Source Destination Protocol Info
185 27712.068199 192.168.18.23 192.168.18.191 SMTP S: 250 2.1.5 Ok
No. Time Source Destination Protocol Info
186 27715.068293 192.168.0.50 192.168.5.2 TCP suncacao-jmxmp > 44693 [ACK] Seq=1 Ack=1 Win=64807 Len=1380

[Code].....

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Programming :: Perl: Find Variable Text Between Keywords And Replace W/ "term_<variable_text>_term"?

Jul 12, 2010

I am trying to write a Perl script that can open a file, find text that appears between two identifying strings (for now, "start" and "end"), then modify that text by enclosing it between "term_" and "_term" . Since the identified strings vary, the replacement string becomes "term_$1_term". From looking at other threads in this forum I've been able to get as far as spitting out the modified terms using the following code:

open FILE, "start2.txt" || die ("Could not open file <br> $!");
$text = <FILE>;
while ($text=~ s/start (.*?) end//) {

[code]....

The problem is how to get "term_$1_term" into the file in the same while loop, which I'm guessing would be some of variant of "$text=~ s/$1/$term/;" (which doesn't work as it stands).

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Programming :: Perl : Get Maxdate From The File?

Apr 7, 2010

I have a input file like below :

949890;01-4477138;20101208;7003907933;0
1352305;01-32175;20101225;7005373440;0
0771586;03-975357;20091206;7004353176;0

[code]....

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Programming :: Perl: Parsing A Log File?

Nov 9, 2010

I have a log file (test.log) starting & ending within dash (--) as below. I am looking to write a parser for test.log. This test.log file currently has single value for one Job ID but I wish to parse for repeated N values of different Job ID - Job, User, Queue, Dispatched Date, Dispatched Time, Completed Date, Completed Time, Hosts/Processor, CPU_T and TURNAROUND. I can either output this 10 values in another .log file or dump into cgi.

The selected parameters from test.log for parsing with above 10 attributes are -

--
Job <345010>
User <xyz>
Queue <gaussian>

[code]....

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Programming :: Writing File In Perl/cgi?

Apr 10, 2010

I'm not able to write to a file using my perl cgi script which is as fallows:

Code:
#!/usr/bin/perl -w
use strict;
print "Content-type: text/html

[Code]....

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Programming :: Cutting An Html File Apart - Perl - Sed - Awk?

Apr 13, 2010

I have an html file like this

HTML Code:

Some more HTML code... I would like to cut the above text so i get this: Sometext on multiple lines like this.Sometext on multiple lines like this.Sometext on multiple lines like this. Sometext on multiple lines like this.Sometext on multiple lines like this.

There are other HTML files with similar cuts I need to do, but once I have the method for doing one, I am sure I can do the others.

I think the two logical strings to cut between would be:

I am not sure if these strings are always the start and end of the line respectively, is this makes a lot of difference! Then the HTML tags would need to be stripped to get the text on its own.

I know the commands for removing tags, but searching for a string like class="IOSSectionTitle", and cutting everything before it etc is something I am finding challenging.

Just thought I would add that the HTML does not nec. appear on logical new lines throughout the file and there may be unexpected new lines, but as far as i know the class="IOSSectionTitle" and <img always appears as a string without any new lines between those characters.

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Programming :: Perl - Grep Open File More Then Once?

Jul 16, 2011

I am using File::Find to go through a very large tree. I am looking for all xml files and open only those that contain a tag <Updated>. I then want to capture the contents of two tags <Old> and <New>.

My problem is, after I open the file and do the first grep for <Updated> (which does work), I am unable to grep again unless I close the file and open it.

I did something like this:

Quote:

find(&check, $dir);
sub check {
if ($_ =~ /.xml/){
open(FILE,"$_");
if (grep{/Updated/} <FILE>){ # <-- works

[Code]....

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Programming :: Perl Script To Look At A Directory For A New File?

Oct 23, 2009

I am new to programming but I am a quick study. I have this script working.

#!/usr/bin/perl
@info=stat("/share/") or die "Can't stat share $!";
while (1) {

[code]...

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Programming :: Read File Names In A Dir And Its Sub Dir In Perl?

Apr 22, 2010

I am writing a script that involves reading the content of a file present in a directory and/or its sub directory. I know readdir returns all the files & DIR names in a directory but how to check weather readdir is returning a file or a directory

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Programming :: Reading Lines Within A File (Perl)?

Mar 16, 2011

I am trying to read certain lines within a file and give the output of the certain lines that dont equal my value, I think showing you would be easier. There is multiples of these inside one file...

Code:

LV Name /dev/vg00/lvol1
LV Status available/syncd
LV Size (Mbytes) 300lable/syncd

[code]....

I want to read everything in the file, if the status is not available then it should display the name (directly above status). If they are all availbale then do nothing. I think I know how to do it which includes putting the info in string form and placing in hash but it is proving to be out of my skill range.

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Programming :: Replace String In File Using Perl Or Sed

Jun 30, 2011

I have question about replacing a string in a file.

How can I replace the printerb's 10.1.1.1 to something else(10.1.1.2, for example) without replace printera's 10.1.1.1 accidentally?

I have tried perl -e -pi "s/10.1.1.1/10.1.1.2/g" /etc/hosts. but, perl replace both 10.1.1.1 to 10.1.1.2.

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