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 :: 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 Move To Prev Line If Match

Jan 31, 2010

sed move to prev line if match

file:

desired result:

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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 :: 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 :: 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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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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Software :: Tool For Replacing First Match Per Line?

May 4, 2010

I've got a file that I want to convert to a CSV format.

Each line of the file is something like:

term1a term1b [pronunciation] definition
term2a term2b [pronunciation] definition
term3a term3b [pronunciation] definition

To get it into CSV, I just need to perform 3 find and replace operations:

First, replace the first " " (space) with a "," (comma). Next, replace the first " [" (space and right-facing square bracket) with a "," (comma). Finally, replace the first "] " (left-facing square bracket and a space) with a "," (comma).

The reason it must only be the first such occurance, is the definition area contains lots of spaces and square brackets which I'd like to leave left untouched.

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Programming :: Copy And Replacing Specific Line From File1 To File2 Line By Line

Mar 22, 2011

I have two files, file1.traj and file2.traj. Both these files contain identical data and the data are arranged in same format in them. The first line of both files is a comment.

At line 7843 of both files there is a cartesian coordinate X, Y and Z ( three digits ). And at line 15685 there is another three digits. The number of lines in between two cartesian coordinates are 7841. And there are few hundreds of thousands of lines in a file.

What I need to do is copy the X Y Z coordinate (three digits) from file1.traj at line 7843 and paste into file2.traj at the same line number as in file1.traj. The next line will be 15685 from file1.traj and replace at line 15685 at file2.traj. And I dont want other lines (data) in file2.traj get altered. This sequence shall be going on until the end of the file. Means copy and substitude the selected lines from file1.traj into file2.traj.

I tried to use paste command but I cant do for specified line alone.

Here i showed the data format in the file. I used the line number for clarity purpose.

Code:

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Programming :: Access A File Line By Line, And Check The Length Of Each Line.

Feb 13, 2011

I want to access a file, and check the length of every line.After, i want to check and replace all lines with length over 10 characters, with a message.Does anyone have a clue on that?

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Networking :: Error: Can't Load Actions File '/etc/privoxy/match-all.action': Invalid Line (9): { +standard.Cautious }

Apr 26, 2011

Every time I try to set to standard.(cautious|medium|advanced) I get Apr 26 17:20:59.960 7f7faff15700 Fatal error: can't load actions file '/etc/privoxy/match-all.action': invalid line (9): { +standard.Cautious } /

or something similar. No additional help is available in the docs. So i try to use http://p.p (i.e. config.privoxy.org), and click on [URL]... expecting to get the three mode buttons. It just returns to p.p.

I already set the three edit vars to allow remote editing etc.So I looked in the top 15 Google hits for "Privoxy standard.Cautious". Apparently, nobody else knows how to do this either even tried launching firefox in root. but I'm getting kind-of frustrated with the writers/maintainers of Privoxy 3.

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Programming :: Compare Two Files Line By Line And Print The Line Which Is Same?

May 30, 2011

I am trying to write a program in C which compares two files and prints the line that is equal.

Here file1.txt has

and file2.txt has

Note: file2.txt consist of only a single string where as file2.txt has multiple lines. Actually im comparing two files with md5sum values.

Here is the code but it compares only first line of files..but it should compare the whole file1..and sorry iam a beginner in C can any1 sujest some modification to this code so that..it can compare file2 with entire file1

Quote:

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Programming :: Insert Line Using Sed Or Awk At Line Using Line Number As Variable

Jul 25, 2011

I want to insert a line at a particular line number using sed or awk. where line number is not fixed and is in form of variable.

I want to use variable in sed or awk command.I tried something like below, but no luck.

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Programming :: Use Awk Or Sed To Match ?

Apr 8, 2011

How awk and sed can be used to preg match strings? how would I go about matching a string like:

Code:

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Programming :: Match A Literal String In Awk?

Jun 2, 2011

how I can match a literal string in awk i.e. making awk to *not* interpret the characters coressponding to its builtin operators in a given string. Take this code:

[Code]...

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Programming :: Cannot Match Strings That Appear To Be Identical

Feb 25, 2011

i have an sql table with 2 columns i run a script that randomly selects a word from the table in column 1.
the word is displayed on the screen and I guess what it means i concatenate the randomly selected word and the answer the script looks for a match in mysql if it finds a match it says "Good job!" if there is no match it will say "not correct". However when i get it right it says not correct even though when i echo the variables they look exactly the same. the script below:

#!/bin/bash
var=$(mysql translator -u root --password=*-N<<EOF
SELECT word FROM tagalog ORDER BY RAND() LIMIT 1
EOF
)

[Code]....

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Programming :: Delete Lines Between Match?

May 15, 2011

My problem is like this I have to delete all lines between two pattern match example- suppose below is the content of the file then i have to delete all lines between text1 and text2

...
text1
abc
def
ghi

[Code]....

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Programming :: No Match For 'operator<<' In '((HttpRequest*

Jul 13, 2011

I have a simple program from book C++ cookbook, page 291, 8.3, Using Constructors and Destructors to manage resources (or RAII), but it can not get compiled in my g++

------------------------------------------------------------------------------------------------
// Example 8-3. Using constructors and destructors
#include <iostream>
#include <string>
using namespace std;

[code]....

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Programming :: Perl Match Rss Tags ?

Apr 22, 2011

I am trying to match the rss files with regex:

If I have a file here:

Code:

I want to match watever that is within the <item></item> tags and save it in the $content variable. however, the <item> tags can spread over multiple lines:

Code:

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Programming :: Sed Match Last X Lines Of A File

Mar 17, 2009

I'm trying to find the correct sed syntax to match from a given pattern to the end of the file and then append that pattern to the end of the file.

I was trying:

But that prints each line right after its original occurrence. I want to match the block and then append it to the end of the file.

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Programming :: String Match In Perl ?

Sep 15, 2010

One of my application generates a text file with an XML output in it. I need to read that log files and if the output does not match to a string in couple of tags it should create a log file with the file name and the the tag name.

The two tags where the string should match is:

Identity format tag should always be JPEG , well- formed and valid status tags should be true.

sample output file:

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Programming :: Display All Lines Before A Match Is Found?

Sep 9, 2010

I have a file, and I have to display all the lines from the beginning of the file till a matching string is found.

I know grep with "-a", "-b" as option does exist, but it needs the number of lines to be printed in advance. eg grep -b 10 "search_string" file so it will print 10 lines before a match is found.

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Programming :: Match Strings Inside 2 Lists?

Jul 8, 2011

I have that script that checks the nfs mount points:

Code:
#!/bin/ksh
#set -xv
test="DO_NOT_DELETE"
rc=0

[Code]....

I am no expert in loops and it took me all day to write that. I couldn't really tell how to match the string in $df_file and $fs_share, so I did a little workaround with a count.

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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 :: Use Of Uninitialized Value In Pattern Match - Perl

Jun 26, 2011

I want to strip the process name from the hosts - i did it with the code below.

I have two questions - is there a more compact way to strip off the process names? usalso i want to get rid of the errors after extracting the hostname. It is complaing about $arry[1]. using my $arry[1] is not allowed. Assigning the slice to a value, as is 'my $sliced_arry = $arry[1]; print $sliced_arry , does not work either.

Code:

Use of uninitialized value in pattern match (m//) at newcomm_stats.pl3 line 7, <NEWCOMM> line 16 here i get what i want - just the host name, but still get those nasty errors. assigning a value to $1 does not work, and localizing $1 with 'my' is not allowed.

Code:

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Programming :: Using Grep To Find EXACT MATCH?

Nov 11, 2010

I'm trying to find exact matches of some users in the /etc/passwd file using "grep -w", but it doesn't always work. For example, I have the following users:[URl].. So, let's say, I want to search for the user "stewart" (which doesn't exist)

[Code]...

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General :: Expect: Line Seems To Match Exactly However Expect Thinks Not?

Jun 16, 2010

I am writing an expect script. At a certain point there is a rule that produces this debugging output:

Code:

expect: does " Address or name of remote host [x.x.x.x]? " (spawn_id exp8) match glob pattern " Address or name of remote host [x.x.x.x]? "? no This just times out When I use -exact for the expect keyword it does work What am I doing wrong? THe first should also match in my opinion because it is equal as well. Even if I remove the I still have the same issue if I try without -exact. I don't understand. I tried removing the but still got the same.

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Programming :: Compare Two Md5sum Outputs To See If The Files Match?

Nov 5, 2010

I would like to compare two md5sum outputs to see if the files match. in my script I have

Code:

ORG_FILE="/path/to/org/file.zip"
NEW_FILE="path/to/new/file.zip"
MD5_ORIG=$(md5sum -b "$ORG_FILE")

[code]....

How do I get just the MD5 hash and not the */.... stuff so I can compare them. i tried Code: JUST_HASH=${$MD5_ORIG:0:32} but All I get is

dir_mon_notify.sh: line 79: ${$MD5_ORIG:0:32}: bad substitution

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Programming :: File Renaming Based On A Pattern Match

Jan 8, 2011

What I am attempting to do is rename some television shows into the format that my PVR will understand for the naming convention. I have a script that cleans them up about 95%, now I just cant figure out the last little detail..

For example: NCIS_01.mkv
I think it can be done in sed, but I just figure out how. I need it to be renamed to: NCIS_s01e01.mkv

How can I make sed (or something else) match the last "_" and any numbers after it until the period and then insert text between them reliably?

Depending on the show, it can be something like: This_show_name_243.avi so I need it to be more flexible than I can figure out how to do..

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Programming :: If Statement Regex Match For White Spaces?

Apr 8, 2011

I want to match for this string:

Code:

Content-Transfer-Encoding:[:space:]base64
Content-Disposition:[:space:]attachment;[:space:]filename="%variable%"

Both lines are new lines, so they won't be inline. Other than that, they are all constants, I want this regex match to be an if statement rather than returning match string. so if the $content variable contains some string that matches:

Code:

if `sed "//p"` ;

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