General :: Modify The Only One Pattern Among Two Patterns In A Text File?

Nov 22, 2010

I want to replace a pattern with other pattern in a textfile. But there are two same patterns,but I need two change only the second occurence. EG:

Text file is

aaaa=1
bbbb=2
cccc=3
dddd=4

[code]....

Now I want to change aaaa=x into some other entry.

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Programming :: Search A File For A Particular Pattern And If Pattern Found Replace The Line With New Text?

Feb 24, 2010

I want to search a file for a particular pattern and if pattern found replace the line with new text. i am using awk 'match($0,"pattern") != 0 {print $0} ' filename to check if the pattern exists.how do i get the line number of the pattern and delete that line and replace the line with my new text?

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Programming :: HUGE Files - Compare A List Of Patterns From One File And Grep Them Against Another File And Print Out Only The Unique Patterns?

Aug 13, 2010

I am trying to compare a list of patterns from one file and grep them against another file and print out only the unique patterns. Unfortunately these files are so large that they have yet to run to completion. Here's the command that I used:

Code: grep -L -f file_one.txt file_two.txt > output.output Here's some example data:

Code:
>FQ4HLCS01BMR4N
>FQ4HLCS01BZNV6
>FQ4HLCS01B40PB
>FQ4HLCS01BT43K
>FQ4HLCS01CB736
>FQ4HLCS01BU3UM
>FQ4HLCS01BBIFQ

how to increase efficiency or use another command?

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General :: Shell Scripting: Inserting Text Into A File Name With A Predictable Pattern

Apr 18, 2011

Just using shell scripting, how can I insert text into the middle of a file name. The file has a predictable pattern, let's say 3 letters and 3 numbers and I want to insert text in the middle of those 2 patterns. Say ABC123 is the file name. As a result, the file name should be ABC.blah.123

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General :: Sed - Append Four Commas ',,,,' At The End Of Lines Containing The Pattern 'Response' In A Text File

Nov 5, 2010

Using sed, I am trying to append four commas ',,,,' at the end of lines containing the pattern 'Response' in a text file with lines such as these:

6,Pulse,50,254968,14886,NA,,,,
7,Picture,8,265157,0,1,15045,2,0,15000
7,Response,1,271553,6396,1
7,Pulse,50,274969,9812,NA,,,,
8,Picture,1,290232,0,1,15045,2,0,15000
8,Pulse,50,294969,4737,NA,,,,
[Code].....

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Programming :: Run Script To Modify Text File?

Mar 20, 2010

I have around 600 empty text files that I need to add the name of this file as part of the data, I mean files from "file1.txt to "file599.txt, all of them empty, and I need to get the name inside the file, so, when I open the file show the name as part of the data "file1".

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General :: Use Sed To Cut Out All The Text Up Until The Pattern?

Feb 15, 2011

I want to cut out part of the 'uptime' output so all it displays is the load average. In the end I want to cut out everything before the word 'load'. I am a total sed newbie and could really use some examples or links. I've googled and haven't found anything useful yet.##edit###I used the 'cut' command- The code was Code:uptime |cut -d, -f 2,3,4,5 |cut 13-

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Programming :: Store Data In Text File And Be Able To Modify It And Save As Well Using C++?

Jan 25, 2010

I wanna learn how to store data in text file and be able to modify it and save as well using C++.

Note: im using Turbo C++ 3.0

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Software :: Scan The Text For Patterns?

Apr 4, 2011

I remember using some dos program that would scan text files for particular words/patterns. It had an ncurses-like interface and if I'm not wrong its name was "Concord". Is there anything like that on linux? The main functionality was as follows:

1. support for regular expressions

2. print lines containing a particular word or pattern (highlighting it) and printing the surrounding lines.

3. print lines containing a particular word or pattern only if another pattern occurs within N words to the left/right.

The second point is easy to achieve in grep. The 3rd one could be done in awk. The problem is that as much fun as it would be to put it all together and embellish with some nice ncurses interface(eg. with dialog), I don't want to reinvent the wheel. Besides, I have just relocated and have been waiting for my phone line welcome pack for almost 2 weeks now (ie. no internet apart from work and mobile phone), which makes it difficult for me to get anything done.

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General :: Awk Varying Patterns To Different File?

Jul 29, 2011

Awk varying patterns to different file?

[Code]...

What I want to do is when the records have identical $3 i.e. same gene:blabla, I want to put them in a file with $3.out (P.S. along with the lines below it) I tried grepping out $3 first separately onto a file, and then taking each line in that file as a pattern and pulling out records using awk. Somehow I faced probs with pulling out onto $3.out

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General :: Bash - Search For A Text Pattern?

Nov 28, 2010

I need to search for a string "teststring" in all *.java files coming under /home/user1/ (including subfolders). How can I do it in linux via shell command.

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General :: Modify Web Browser Appearance / Text Size (Firefox With Fedora 14)?

Jun 4, 2011

Struggling to find right place to post, or for FAQs, or anything, because reading web browser is such a strain: can use Firefox v. happily in MS Windows, but, new to Linux and Fedora (14), I can't physically SEE where to start modifying appearance of either desktop or browser, which seem minute. I'm sure there's a really simple route if someone can just start me off.

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Software :: Replace Newline Pattern In File By Other Newline Pattern In A Shell Script?

Nov 22, 2010

I have several (vhdl) files containing a pattern with newline characters that I need to replace by another pattern that also contains newline characters.

I start with something like:

Code:

I want to replace it by something like:

Code:

(I need to paste some lines)

As I need to do this (very) often I want to use a shell script.

I tried:

1.

Code:

result:

Code:

2.

Code:

result:

File remains unchanged

3.

Code:

result:

Code:

4.

Code:

result:

Displays the unchanged testfile

How I can automate the pattern replacement?

Code:

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General :: Add (not Replacing) A Pattern Match With A Similar Pattern?

Aug 30, 2009

I'm writing a bash script to search html files, and when I find any occurrence of an img src tag like this:

<img src="123-picture-normal.jpg" alt="some random user entered text" border="0">

I want to add a second line below it that looks like:
<img src="123-picture-thumbnail.jpg" alt="some random user entered text" border="0">

All I need to do is duplicate the line but replace "normal" with "thumbnail"

Each file can have multiple img src tags with different numbered jpgs.

I have a feeling this is a job for sed, but I'm struggling with it. Any ideas?

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General :: Replace A Pattern In A File?

Jun 11, 2010

I want to replace a pattern in a file.The file format is given below.

111111
path=/home/fun/
222222
path=/home/fun/

[Code]....

I want to replace "path=/home/fun" with another pattern, but only under "111111", all the others should be the same.

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General :: Find File With Dir/file Pattern?

Jul 26, 2011

i'm just curious if i can search for the dir/file pattern in the single "find" command?
here is an example:

dir1/dir2/dir3/file.txt
dirXX/dirYY/dir2/dir3/file.txt
dir1/dir4/dir3/file.txt

i want to search for the pattern "dir2/dir3/file.txt"

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General :: Find Pattern After Specific Pattern

Oct 11, 2010

I want to go through a log file and find pattern1 and then a pattern2 only after pattern 1.So for example I want to know howManyRecords was in 13:30.I figured I grep for "start time for the job" and then only after that (and before the next occurence of that) grep for "howManyRecords". Is this a sane way?

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Programming :: Grep The Patterns From The File?

Aug 10, 2010

I am interested in using the grep method in the shell of my CentOS machine to obtain patterns from a file and use them to search through another file and highlight the patterns found. For example:

pattern file:

one
two
three

test file:

AAAAAAAAAAAAAAAAAAAAAoneAAAAAAAAAAAAAAAAthreeAAAAAAAAAAAA

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Programming :: Insert Text Before The First Pattern Found?

Apr 8, 2011

i need to add this line nameserver 208.67.122.221 from ISP before the first nameserver already exists in resolv.conf in all workstations i know

Code:

sed '/nameserver/ i
ameserver 208.67.122.221'

but that insert it on every line after nameserver not only before the first one

Code:

# blah blah
# blah blah
domain mydom.com

[code]....

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General :: Using Grep With Pattern File And PCRE

Sep 25, 2010

I would like to write a newline delimeted rules file using PCREs for use with the grep command. Grep has the option -f to obtain the search pattern from a file, and option -P to search using PCREs. However, these two options do not work together. The -f option only seems to work with fixed string rules.A friend previously helped me get around this limitation somehow, but I can't remember how he did it. I also would like the ability to add comments at the end of each rule in the file.

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Ubuntu :: Text Manipulation - Regex - Pattern Matching?

Jul 12, 2010

Are there some good tutorials or reference materials on how do pattern matching and text manipulation in Linux?I have a few simple tasks I'd like taken care of...like formatting numbers in file names, stripping some text from directory names, etc

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Programming :: Insert Line Of Text Prior To Pattern Only Once?

Jun 29, 2010

I have a file like so:

Code:

one
two
three
four

I would like to insert prior to the word "three" all items from this second file with the following contents:

Code:

four
three
two
one

Now my issue is, and I have been using both sed and awk currently, that after the second line of the new file is read there will of course now be 2 copies of the word "three" but I would like to only insert the final 2 words, ie "two" and "one" prior to only the first occurrence of the word "three" so final file will look like:

Code:

one
two
four

[code]....

So here there is now only one of each word from the second file joined to make the new file. For simple code I have tried something like the following:

Code:

while read line
do
awk -v n=$line '!f && /three/{print n;f++}1' file1 > tmp_file
mv tmp_file file1
done < file2

Now this works but seems very clumsy to me. There is obviously a better sed and / or awk out there.

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General :: File Matching Pattern On Command Line?

Sep 9, 2011

I've got files in a directory as follows:

1.png
1_thumb.png
1-1.png
1-1_thumb.png

[code]....

I want to list all the files that don't have a copy with the same filename with -1 somewhere in it. So, in the example above, the results would be 3.png.

NB: the file and its copy with "-1" in it will be the same filesize, if that helps.

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General :: How To Make Grep To Search A Pattern In Only Specific File Type?

Mar 6, 2010

To search a string pattern in all files in a directory and subdirectories, I am using;

Code:
grep -R "myclass::my-func(" mydirectory/
Now I want grep, to search in only specific file types say *.cc. Please help me. I have read manual of grep, but could not deduce any hint.
Best Regards.

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General :: Removing A Line From File Which Is Having Specific Pattern Using Shell Script?

Mar 20, 2011

I'm new to the shell scripting. can any one help in creating shell script for matching the content of the specific variable with file. it should remove that line from the file if line is containing same value as variable and keep the other content as it is.i used grep -v for accomplishing the same. But grep will remove the pattern which is similar.For eg. Assume file "test" contain datas :aaffif i used grep -v command for the pattern "a" to this file this will remove content "aa" from the file. I want the pattern only "a" should remove from the file, if it is existing. otherwise it should throw alert content not exists.

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General :: Modify A File That Contains \ Using Sed Or Awk ?

May 13, 2010

I need to modify a file that contains \tsus.fbfs.comappsdataStormLossProduction and replace the \tsus.fbfs.comappsdataStormLossProduction line with rm -f /mnt/nfsvol/PC/SLR/

I have tried:

But it provides an error on the second . I need to change this in place and not redirect to another file.

Is this possible? I have used sed and awk before but not extensively.

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Programming :: Shell Script To Delete Part Text Of A Line If Pattern Matches?

Apr 12, 2010

I am trying to create a shell script, on taking a input file as parameter, which need to do 3 things

1) create a copy of existing file.

2) add a new line to the copied file.

3) strip off all the absolute paths inside the copied file

The first 2 points are straight forward. but i am finding it difficult to acheive the 3rd point. myself not very good with awk and sed. but gave it a shot in vain. For example, the input script consists of below,

PROGRAM=`/usr/bin/basename $0`
HOST=`/usr/bin/uname -n`
echo Start $PROGRAM `/usr/bin/date` |
/usr/bin/tee -a $LOG

The output of the script should look like,

PROGRAM=`basename $0`
HOST=`uname -n`
echo Start $PROGRAM `date` |
tee -a $LOG

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General :: Shell Script To Delete File If A Pattern Is Found And Restart Servers?

Jul 22, 2010

I have requirement to delete some log files from a directory if a string"deletethisfile" is found.Then restart the application servers.1. Search for the string ?deletethisfile? in server.log file under a directory, If found 2. Stop that particular server.3. Delete the log file 4. Restart the server.

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General :: Copy A File With Certain Name Pattern For Which Exact Place In Complex Directory-structure Unknown?

Sep 19, 2011

I want to copy all files with the name XYZ* into one folder. The problem is that the files are in different subfolders and that not even the depth of the folder structure is the same for all files. Luckily, at least each file has a unique name.

Of course, I thought about the cp command but I guess the depth of the folder structure needs to be the same for this to work.

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General :: Copy Lines Starting And Ending With Specific Pattern From Multiple Files To A File?

Jul 27, 2011

A function by name abc is called in many files. I want to copy all the lines with the function call to an output file.A simple grep on function name doesn't help me as the function call is spanning across multiple lines as follows:

abc(parameter1,
parameter2,
parameter3);

So I want to copy all the three lines (till semicolon) to the output file.The problem is because there are more than 200 calls for the same function and I cannot do it manually

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