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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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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Programming :: Searching Pattern In Tab Delimited File Using Grep

Mar 4, 2010

Suppose i have a file(1.txt) separated by TAB delimiter in a line

1 B AB 2
2 C AB 2

if I need to search for the records having B?? using grep.If i need to perform multiple search like line having "C and AB" or "B and AB"??

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General :: Grep Or Sed To Delete Matching Pattern?

Jul 7, 2011

How can I use grep -Ev "pattern" not only to delete the matching "pattern" but to edit and save the file permanently as well

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General :: Grep Pattern Of Root Directory?

Mar 5, 2011

Want to grep pattern of root dir. (/). Staying in current directory. But I don't want to use the below code:
cd /
grep m *

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Programming :: How To Grep Pattern Which Is Split In 2 Lines?

Dec 9, 2010

I need to grep a pattern which can be present in one line or could be split in 2 lines.Normal grep wont work in this case. Can anyone please help on this?There are 100's of files in which i need to search for this pattern so time is also a constrain.

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Programming :: Grep Until Certain Character Or Pattern Appears

Jun 25, 2010

I have the following command that greps "/etc/cron.allow" and displays the following 9 lines of $file grep -A 9 "/etc/cron.allow" $file On the other hand I would like to grep a file for a certain text display the next couple of lines and stop when i hit a specified word or blank or pattern.Basically I would like my grep to end when the shell hits a blank, certain key word or pattern specified in command.

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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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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 :: Input File - Grep Within Grep

Nov 22, 2010

I need to kind of grep within grep. My input file would be something like:

[Code]....

and I need to find the first occurrence of hello before MY PATTERN (hello 9008 in this case), so the output should be:

[Code]....

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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 :: 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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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 :: 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 :: 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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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 :: Use Grep, Cut, Or Awk To Get An IP From A File?

Feb 3, 2010

I have a file which contains a line like this:SERVER=10.205.110.19 How can I cut out the IP and assign it to a variable?

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General :: Grep The Contents Of A File With Another File?

Sep 25, 2010

someone once told me that use can pass a file to grep and use that to search the contents of another file. if that is the case I'm not entirely sure why the following isn't working for me.

Code:

[root@LCENT01:~]#grep -i id_rsa.pub .ssh/authorized_keys
[root@LCENT01:~]#cat id_rsa.pub >> .ssh/authorized_keys
[root@LCENT01:~]#grep -i id_rsa.pub .ssh/authorized_keys

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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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General :: Grep Or Sed Or Awk For File Manipulation?

Dec 7, 2010

Let me *try* and explain what I'm trying to do, and keep in mind aside from a little command line stuff I'm a beginner to any of what I'm asking about.

I have a directory structure something like this:

Code:

/usr/local/chatlogs/
webserver1/
1.chatlog
2.chatlog

[Code]....

So that whatever was captured in the () in the first part of the statement would be used in the 1 in the back part of the statement for every n.chatlog that might be in any of the /webserver directories at that time.

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General :: Grep 2 Items In A File?

Dec 31, 2010

I have collection my routers configuration through rancid. Now i want to do the following,

Display all the files that contain the following words

C1841 AND HWIC-4ESW

I want to display all the files that contains both these words.

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General :: Read File And Pipe To Grep

May 26, 2011

I'm storing a list of strings in a file and would like to read the file and pipe each line returned to grep which in turn searches a directory for files containing the string.However this is not returning any output.

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General :: Search For A String In A Php File Using `grep`?

Jan 19, 2010

I am searching for Class declaration on a site with hundreds of PHP files, how can I do this in the current folder and subfolders using GREP?

I tested cding to the folder and then something like

grep -r 'class MyClass' *.php

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General :: Grep And Store Two Lines In Other File

Feb 16, 2011

I have following contents

I want to grep "#2" and want the output as

How to using shell script?

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General :: How To Grep Negative Number In File?

Mar 4, 2010

I wanted to grep the line in a file starts with -1.000000e+00.

Tried grep "-1.000000e+00" *, got error "grep: invalid option --".
Neither of the following works:
grep "-1.000000e00" *
grep "1.000000e00" *

How do I grep a negative number with scientific notation?

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