General :: Parse A File And Print Each Line That Ends With Matching Pattern (if The Next Line Is Blank)

Aug 2, 2010

I've written a script to parse a file and print each line that ends with matching pattern, if the next line is blank. The pattern lines are the result of md5sum $i|sed 's/path///g' so that only md5 and filename appear. Here's what I'm using.

Quote:
for fline in `sed -n '/.*.ext$/p' file1`
do
if [ "`sed -n -e '/'"$fline"'/ {n; p;}' file1`" == "" ]
then
echo ""$fline" has no info" >>file2
fi
done
[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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Mar 27, 2011

I have a question about sed programming, actually a one-liner for which I cannot find a solution, right now. I need to delete a line matching a specific pattern only if it is the last line. In practice, I would put together the following:

Code:
#
# This deletes the last line of a file

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Oct 19, 2010

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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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Mar 30, 2011

I need to grep for a particular string and if found need to display the line containing that string, the line above that and also the first line of that paragraph.

Can this be done via sed.

Eg, My Paragraphs

OA connectA

Enclosure:

Interconnect Module #6 Status:

Here, if I grep for Critical, it should display the following

Similarly if I grep for Degraded, it should display

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Sep 28, 2011

I am trying to parse a line from a file and place the values into separate variables:

input.txt:

Code:

CreateVegaFeed-20110928-before-skip-start

this is the code i have done so far:

Code:

$input_file="input.txt"
INPUT_FILE=`cat $input_file`
for i in $INPUT_FILE

[Code].....

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Dec 23, 2010

I have a log file that contains information like this:

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Changed paths:
M /projects/
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[code]....

what i need is, i need to copy the data given between the "---" to seperate files, for, e.g. the first set of data between the "---" should be in one file and another set of data in another file.

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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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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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I want to print the line number with the pattern of the line on a same line using multi-patterns in sed. But i don't know how to do it. For example, I have a file

abc
def
ghi

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Jan 26, 2010

Quote:Originally Posted by topcatI would like to know how i can write a shell script to delete a line if a particular pattern exists?E.g. I have a text file with multiple lines. Say 1000s. in the following pattern.

username@email.com:149.0.3.4:1
username1@email.com:149.0.3.4:1
username1@email.net:149.0.3.4:1
username1@email.edu:149.0.3.4:1

If the patternusername@email.com exists then the line "username@email.com:149.0.3.4:1 should be deleted from the file.I have a very similar question but I need to delete one line in a file which matches one very precise instance of a string only. Let's assume I have a file composed of thousands of lines and let's call the file chap-secrets. Let's take the following sample entries:

Code:
#USERNAME SERVER PASSWORD IP
pp pptpd blahblah *

[code]....

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Feb 13, 2011

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int main(int argc, char** argv)
{
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Dec 23, 2009

I am trying to write a script that takes an input file ($FileName) and an intermediate file ($FileName.info) and removes lines from $FileName if the value in $2 of $FileName.info is <75.

I can't figure out how to feed only one line of the .info file to the if statement at a time so that it will perceive it as an integer instead of a list.

The error I am getting now is ./script.sh: line 6: [: : integer expression expected

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Code:

Code:

Code:

Script so far:

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Mar 12, 2010

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150: def foo(bar):
151: """

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Apr 1, 2011

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b1a:] cat test
hello my name is
b1a:]

and I'd simply like to append "Bob", how can I do it? If I use

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b1a:] cat test
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b1a:]

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Jan 18, 2010

I have found many information about how to delete/grab a line in a text file including delete line with match a pattern but I did not find info about how to delete a line which match a pattern of a particular column only.

for example mydata.txt:
id type x y z
1 6 0.474611 0.227223 0.583947

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Mar 4, 2011

I am using an awk command to print a line from a cvs file.the awk command includes an if statement that filter the output-lets say i want to print all the lines that the price field is greater than 30.i have it working when i put the parameters myself.. but when i try to send them with vars it wont work..i am sending the sign of the if statement - can only be: == , < , >it looks like this:

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I've never programed shell scripting.

Code goes like so:

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Mar 13, 2011

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If I wanted to copy all *.so files from src to dst I'd do:
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if the given pattern exists in the file with the very next line starting and endingwith the same pattern , delete the line that starts and ends with the given pattern.So upon running on this file

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writing scripts

[code]....

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Jan 3, 2011

I wish to add information to one of my files based on matching IDs,

Here is an example

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And the output i wish to be

OUTPUT:

So as you can see the ones that do not match are still present, and the ones that do match just have the extra information from file2.txt added to them.

I thought about using join but that only seems to join the ones that match displays thoes only. i would like all the information in the output file.

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Source:

Code:
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[Code].....

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