Programming :: Add A Character To The End Of A Line When A Certain Match Text Is Matched?

Nov 5, 2010

Is there any way to add a character to the end of a line when a certain match text is matched. I have a text file where any line that contacts text XYZ a z is placed at the end.

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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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Programming :: Sed To Output Block Of Text If Specified Text Is Matched?

Feb 13, 2010

I am trying to find sed command combination to print out the "start command" line, the id line and all lines between "details" and "stop command" only if "error" exists. Here's the original output (test.txt):

start command
id 1
kajsdlfjsalj

[code]...

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General :: Match And Combine 2 Text Files Line By Line

Mar 21, 2011

This solution works but is slow with large files. I am looking for a faster solution.

The 2 files contain filenames, one of them has associated data I want to append to the other file's matching filenames

file1:

file2:

I append file2 by matching the unique_filenames and appending them with the tag data and some formatting

appended file2:


Here is the SLOW code

while read inputline.

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Programming :: Sed Regular Expression Match Everything Up To A Certain Character

May 27, 2009

I need to use sed to edit a file that contains just one line. This should be pretty simple, but I've googled and can't seem to figure it out. I need to match everything from a certain string up until the first comma in the line. There are multiple commas in the line and my matching pattern is matching up until the last comma, not the first.

Here is what I'm trying:

As you can see it is matching up until the last comma. Seems like the .* is matching any character including the other commas. The output from this that I am hoping to achieve:

How can I get the regular expression to match from asdf: up until the first comma?

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Programming :: Shell To Remove Line Matched With Variable?

Jul 25, 2011

I'm using sed to remove certain line in a text file based on a match with 2 variables from input. Here is how it looks like in file

Philip S:Odds:45:343
Mike Junior:Odds:3:56

I prompt for 2 inputs in variable form which is compared to the first 2 fields of the above text (: seperated). So say i enter Philip S and Odds then it should delete the entire first line.

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Programming :: Perl Match Character - Random Sentence Generator ?

Aug 11, 2010

I am trying to make a random sentence generator in perl. So far I can loop it x times to make a fixed quantity of words, but I don't want to do that. Or I can let it go on until I hit ctrl-C :/

I want to have it so that when it reaches a word with a sentence terminating punctuation mark it stops.

My attempt to do that was with:

This is doing the woooosh text until ctrl-C thing...

Now however I am not sure how I can cut off everything after the punctuation mark (when it exists).

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Programming :: Sed - Add A Line After A Match?

Sep 16, 2009

I need to edit the sudo file on lots of machines. I figure the easiest way is to run a for loop to ssh to each box, sed the sudoers file to a new file & copy/move back over the top of the original (and of course, change permissions accordingly)

The problem is, I'm not sure how to add a line after a match with sed.

So if my file looks like:

Code:

I'd like it to add the new sudoer after "other" so the file looks like:

Code:

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Programming :: Sed Move To Prev Line If Match

Jan 31, 2010

sed move to prev line if match

file:

desired result:

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Programming :: C++ Character Search In Text File?

Jun 23, 2011

Im trying to read a file in c++ and search for particular character for example if this is a list that I have:

Alice
Bob
David

[code]....

if the input is D, it should give David, if its B, gives bob. so in this case, meaning it reads the first character of every line. but if possible I want to make this dynamic so the user can specify which character position he is looking for, so in case he is looking for R as character index 3 in all lines, it should give Charlie. but the problem is, it does now recognize , besides, I do not know how to specify the character position in each line.

here is my code

Code:

#include <iostream>
#include <fstream>
#include <cstring>

[code]....

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Programming :: Sed To Change Character In Text File Only Once?

Sep 7, 2009

I have a script that looks like:

Code:

cat servers.txt
trivia:P:N
trivia:D:N
tucana:P:Y

[code]....

I want to be able to find the lines that matches my input and change the N to a Y, but only for the lines that matches the name and not any other N's My problem is the line does not always contain a P as it can be a D as well so my matching did not work. If my script issues the name $1=triva the lines will change to:

Code:

trivia:P:Y
trivia:D:Y

I have the following code so far but as you can see it does not change the D's

Code:

sed -i 's/trivia:P:Y/trivia:P:N/g' servers.txt

*** UPDATE ***

should I be using a method as follows? I am still stuck on the changing all instances though.

Code:

$1=server
sed -i 's/$server1:P:Y/$server:P:N/g' server.txt
sed -i 's/$server1:D:Y/$server:D:N/g' server.txt

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Programming :: Sed - Match One Line Make A Substitution A Few Lines Down?

Jun 6, 2011

I need a substitution of a particular string (StringA) with another string (StringB). However, there may be more than one occurrence of StringA within the file, but only one instance needs to be changed, which is why I'm trying to be sure of it's positioning against something I know will be unique in the file, and will always have the same distance from the string to be replaced. So, I intend to match on a string (StringC) above the string to be substituted and then have sed go to StringA below and replace with StringB.

So far, I have had some success with the following:

Code:

... but I can't help thinking that there *has* to be a cleaner way of doing it.

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Programming :: Insert A Character In Line Using Sed/awk?

Jul 25, 2011

I have a string as below

LogFormat "%h %l %u %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i"" combined

Want the above string to be modified as

LogFormat "%h %l %u %D %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i"" combined

inserting %D after %u in the string

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Programming :: Print A Line Of Fill Character In C?

May 15, 2010

As you know, in C++ you can use setfill(char c); and setwidth( int length) to fill a line of a character.
It's line making a line of a character for output

Code:
NAME DEPARTMENT LOCATION
==========================================
Pete R&D Chicago
...
==========================================
As you see, a line of a '=' character drawn to output.

I'm wondering, how can I draw this line in C using printf() to format?
( no loop or repetiton )

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Programming :: Bash Scripting - Parsing Text File By Character

Aug 11, 2009

Is there a way to process individual characters one-by-one from a text file in Bash, or is that hoping for a little too much from this lovable old clunker?

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Programming :: Replace Character With Hex Value Choosing From Shell Cmd Line?

Jun 9, 2011

I am bouncing a file across platforms (windows->solaris->mainframe), and the file is starting out with a "special" character (the registered trademark "circle R") in some of the records. This character is not in the EBCDIC character set on the MF, so it is unrecognizable. The MF developer I am working with asked if it is possible to replace the character with a specific hex value (AF) before it gets to the MF.

I was putzing around with sed, tr, etc. on the ksh command line, hoping to find an easy way to get one of them to substitute hex instead of ASCII. I have found that the usual shell utilities recognize the trademark character, so homing in on what to replace is solved. But I cannot get anything to actually substitute in the hex sequence I want. E.g. I was thinking something like...

>cat special_file | sed 's/R/AF/g'

But my version of sed does not seem to have hex "editing" capability.

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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 :: Shell Script Comparison For Two File(text) Character Wise?

Mar 1, 2010

I need to write a shell script which can compare two files(text files) character wise. eg. underscore is space.

------FILE 1---------------
A_B_C
D_E_F
G_H_I

[code].....

Actual problem: I need to write a shell script which can give me difference character by character not by line (using comm)

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Programming :: BASH: Each Line Of Multiple Text Files Gets Added To One Line?

Sep 12, 2010

I currently have 3 files with floating point data that I wish to have in a single file with the format:

Code:

F1 F1 F3 Output
a1 b1 c1 a1 b1 c1
a2 b2 c2 a2 b2 c2
a3 b3 c3 a3 b3 c3
a4 b4 c4 a4 b4 c4

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Programming :: Csh Shell Script - String Concatenation - Add A New Line Character?

May 4, 2009

Inside a loop i'm populating a string variable. Because csh doesn't have very good support for arrays I thought of doing this. I want to add a new line character to the end of the concatenation each time the loop iterates. Then at the end print this variable out.

I tried " and some resources said it was just a "". Neither work. What am I doing wrong?

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Programming :: Open Two Text Files - Read Them Line By Line And Update Parameters Of The 3rd File ?

Oct 18, 2010

I have two txt files containing x and y coordinates: xcoord.txt & ycoord.txt. I need to open them; read them line by line to get each coordinate; then each time I need to update Xs and Ys parameters inside another file called "dc.in" with the grabbed values.

Finally each time I need to run two exe files ( dc_2002 and st_vac) and produce corresponding output for each Xs and Ys ( dc.in is an input file for this exe files)

I have written the following code but it does not work:

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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 :: Text File Replace Occurrences Of Three Character String ZZZ With Quotation Mark

Mar 30, 2010

I want to use SED to do the following: In a text file replace any occurrences of the three character string ZZZ with a quotation mark "and. replace all occurrences of a comma with a semi-colon. It is the S/ / / command which is stumping me on the first issue...inparticular how to get the replace string to be quote.

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Programming :: Bash: Read A Text File Line By Line?

Jul 7, 2011

bash 3.1.17(2) I'm trying do write a shell script which must operate on each line of an ASCII text file. So, all the code must be inside a loop, and inside the loop, the first thing should be to read the next line from the file. I have the bash read command. But it reads from stdin. Any way to make read from a file?

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Programming :: Using Python To Merge Two Text Files Line For Line

Jul 6, 2010

I'm a bit new to Python programming and hoped that someone might be able to help with a problem I'm having. What I essentially want to do is to combine two text files line for line. I know how to do this in a bash script so to give you a better idea here's the code for that:

Code:

This is basically for adding on values to the end of a CSV file that uses ';' as the delimiter. So say file1 said:

And file2 said:

Then running this command would create merged_file1_and_file2 which would be:

The code I'm using at the moment is:

Code:

As I'm sure any experienced python programmer will see, this prints out the first line of the file "csvraw" and then all of the lines of "stamps" and then the remainder of "csvraw".

What I'd like to do is something like: (pseudo code, I know it's not python ;-))

Code:

Is this possible? I've tried googling and my Python Pocket Reference hasn't been much help. I've looked at pickling but that doesn't seem appropriate.

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Programming :: Text On A Specific Line At The End Of A Line?

Jul 26, 2010

I'm trying to add text to a file for a specific group of users, I'll need to do examples as I can't think of an easy way of explaining, my file is like this:

Code:

users{
user1
user2

[code]....

At the present my code lists all the available groups, how would I add a user to a specified group? (e.g add "members user3") to the end of group 1 for example. So the code ends up like this

Code:

members user2,user3

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General :: Script For Deleting Matched Line Of File From Another

Sep 3, 2009

I have two text file named 1.txt & 2.txt.

1. txt contains 5 laks of mobile number.
2. txt has 60 laks of mob no.

Situation is that I want to find and delete numbers in 2.txt which already in 1.txt. Any perl or bash script or any other way to get the work done.

I tried the following:
#! /bin/bash
IFS=$'
' for NAME in $(cat one.txt)
do sed -ie "|^$NAME$|d" two.txt done
echo "***DONE***"

It works well with smaller file but it take very very long time even processing 10 thousand numbers.

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Ubuntu :: Regex In Grep - Match With Any Character Combination

Dec 10, 2010

regex in grep? I need to match ANYTHING in the following with any character combination (something like * in findstr in C): grep "Delivery of nonspam" /var/log/mail.log | grep "to [URL]"

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Programming :: Match Datetime By The Minute (not An Exact Match By The Second)

Oct 21, 2010

I have the following query:

Code:
$sql="SELECT table1.datetime, table1.user_id, table2.ip, FROM table1,table2 WHERE id='$id' AND (table1.id = table2.id AND table1.datetime = table2.datetime)";

In table2 the datetime fields are about 1 to 2 seconds off due to the source of the data, which I cannot change.

Is it possible via a query match table1.datetime & table2.datetime by HH:MM (ie. to the minute instead of to the second)?

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Programming :: How To Append Text To Second Line Of File?

Nov 6, 2010

Say I have a text file like:
Code:
1
3
4
How would I use ksh to put the number '2' into the second line of that file?Okay it's not bash, it's ksh because this computer is OpenBSD

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