Perl is a high-level, general-purpose, interpreted, dynamic programming language. It was originally developed by Larry Wall as a general-purpose Unix scripting language to make report processing easier, over a period with support from open source community, it has evolved and matured to be used for ...

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2
votes
3answers
158 views

Apply item replacement inside enumerate in Perl regex?

Data 7. Masi is the same as \begin{enumerate} A B ABC ha lorem \end{enumerate} 1. ABC is \begin{enumerate} P B Lorem maam \end{enumerate} which I want to be 7. Masi is the same as \begin{...
1
vote
4answers
175 views

Remove only given strings from given column?

INPUT: <tr><td>FOOBAAR</td><td>FOOO</td><td>BAAR</td><td><font style=BACKGROUND-COLOR:red>2014-02-14 13:34</font></td><td><...
1
vote
1answer
281 views

Using kornshell or Perl to circumvent permissions needed by root

I have a problem where I need to change the ownership and permissions of one file that exists on more than 200 servers. I belong to 2 different groups and need to change the ownership from one group ...
1
vote
1answer
894 views

Perl print the lines matching with the columns of file 1 and file2

Here I am printing the contents of the file which are not matching. I want to do a vice versa, i.e. print the lines of file1 (those which are matching in file2) #!/usr/bin/perl # create names ...
0
votes
3answers
9k views

compare two files based on a column and print it

I have two big files of 400,000 lines. I want to compare the column 1 of the second file with column 1 of first file recursively. If they match I would like to print the whole line. It is a sorted ...
0
votes
2answers
905 views

How to match date in Perl — assuming UNIX regex is the same as Perl's

I want to match dates of the form Monday May 26 My attempt to do this is the following: /(.*day Jan.*|Feb.*|Mar.*|Apr.*|May|Jun.*|Jul.*|Aug.*|Sep.*|Oct.*|Nov.*|Dec.* [1-31])/ The regex form in ...
4
votes
2answers
84 views

Using perl to modify a LaTeX document

I am trying to use perl in order to modify a LaTeX document. In fact, I am trying to change the citation format from for example: . \cite{poelma20113d} to \cite{poelma20113d}. In other words, I ...
1
vote
1answer
2k views

Interpret an interpolated variable as a literal string in Perl regex

I am using perl to colorize a matched string MATCH=aaa printf "aaa\n/dev/aaa\nccc\n" | perl -pe "s/($MATCH)/\e[1;31m\1\e[0m/g" This works well until I try to match a string containing special ...
4
votes
3answers
2k views

replace column of a csv file with column from another file

I have two sample files like this: $ cat file1 abc,sachin cat,kumar $ cat file2 xyz pressure $ cat file3 xyz,sachin pressure, kumar I want the first column of file1 to be replaced with file2. ...
2
votes
0answers
240 views

How to print the first three lines and last two lines of a file using perl? [closed]

Through the command line I draw one or several of the patterns found text.xml file: perl -ln0e 'while(/<PMResult.*?<\/PMResult>/gs) { $x=$&;print $x if $x=~/BCCEL-[1-3]/}' text.xml I ...
0
votes
1answer
172 views

Duplicate specific text in text file, using perl or grep

I need to duplicate part of a plain text file as follows: The text file consists of a sequence of "pages", of the form: <page [lots of lines of text] /page> <page [lots of ...
1
vote
4answers
181 views

Print text between tags (inclusive) if certain text is found

I've got a task to extract data from several Apache servers. The task is to print out: <Directory ...> ... </Directory> where +ExecCGI is located within. Let me give an example to ...
-1
votes
1answer
147 views

Is Perl obsolete? [closed]

Is it worth learning Perl or it is an obsolete language and other languages should be learned instead of it? I am a newbie and I would appreciate it if someone could shed light on this subject and ...
3
votes
10answers
5k views

Finding the maximum of the values in a file

I have a file which contains several numbers, as follows. 21 12 33 35 21 12 33 44 52 63 14 12 23 34 11 12 13 53 1 12 43 33 44 How can I find the maximum of these values, which is 63? I wanted to ...
1
vote
1answer
3k views

Using EXIFTool to add EXIF data from filenames

There is a set of photos with timestamps in their filenames like these: Photo on 3-09-12 at 9.24 PM #2.jpg Photo on 3-09-12 at 9.24 PM #1.jpg Photo on 3-09-12 at 8.23 PM.jpg etc. ("3-09-12", ...
2
votes
4answers
469 views

Take a sum based upon particular columns

I have a huge pile of data—around 30 to 40 Million data items. We need to process these files and send to another interface team. Below is my file format which we receive c1 c2 c3 c4 c5 ...
0
votes
2answers
336 views

Method to paste specific column when in terminal

I'd like to paste only the third column of data from within the terminal. I originally have something like: 4 SF0086 SF0086 12 SF0087 SF0087 17 TSF141 TSF141 29 TSF070 TSF070 30 TSF028 TSF028 31 ...
6
votes
3answers
577 views

Is there a perl or awk solution for this problem?

I have an input file (input.txt) like below. id1 id2 name weight 53723848 12651711 timburnes 1.36667 53530214 12651711 timburnes 1.51191 53723848 53530214 timburnes 1.94 764157 ...
4
votes
7answers
380 views

How can I groups numbers in a file

I have a file with numbers in float format. I can review them via sort -rn numbers.txt | less I would like though to be able to "group" them. I.e. easily see how many are in the same range. To give an ...
7
votes
3answers
1k views

What is the difference between invoking a perl script via sh or perl

I have a simple Hello World perl script. #!/usr/bin/perl print 'Hello world.'; It works fine if I run it via perl <file_name>, but it fails I run it via sh <file_name>. My ...
1
vote
3answers
123 views

Are there any difference using pipes?

Using Ubuntu 12.04. Using pipes (5 times): $ time echo XYZ | sed 's/X/A/g' | sed 's/Y/B/g' | sed 's/Z/C/g' ABC real 0m0.005s user 0m0.000s sys 0m0.000s $ time echo XYZ | sed 's/X/A/g' | sed ...
4
votes
1answer
96 views

Regex this question format into LaTeX

1. Lorem ipsun la la la? 1. Sopor 2. Stupor 3. Torpor 2. A patient has Lorem? 1. Sopor 2. Stupor 3. Somnolentia 4. La 5. Coma 3. Doesn't Response to strong external irritants is short. Tendon, ...
2
votes
1answer
60 views

convert to epoch and back

I've used the following two perl command lines successfully: perl -e 'use Time::Local; print timelocal(7,51,10,22,3,2014), "\n";' which returns 1398163867, and perl -e 'print scalar(localtime(...
3
votes
2answers
97 views

How to overcome TZ difference on different servers?

We have a few servers in different timezones. We have a table.html that contains dates. We want to have correct dates in each server, so we thought that: - we should convert the time on server "A" ...
4
votes
4answers
3k views

merge 2 rows based on the same column values

I have a file like below. 47196436 47723284 name1 1.77273 42672249 52856963 name2 1.06061 52856963 430695 name2 1.16667 55094959 380983 name3 1.55613 17926380 55584836 name4 1.02461 3213456 34211 ...
3
votes
3answers
189 views

awk - to add a column after matching the remaining columns

I have a file (file1.txt) with the contents as below. 8145216 3377090 1.5 1405541 53595498 1.53637 I need to generate all the possible combinations for the first 2 columns in the above file. I use ...
1
vote
2answers
93 views

watch perldoc output preserving formatting

When I use watch to follow a perlpod documentation i am writing, the formatting gets mangeled (see NAME and Synopsis sections): Every 2,0s: perldoc lib/Uki/Handlers/SOS.pm ...
4
votes
2answers
124 views

introduce line break at the same position based on another file

I have 3 input files all having the same number of lines. I have come up with a movie example to make the question look interesting. file1.txt -- Essentially contains the actor names. 1234|...
1
vote
3answers
7k views

Extract part of string using grep

I have 3 files in a directory MYO144064T MYO144064TA MYO144064TX Where the digits and 11th character will change. In my csh script, I want to extract the letters 'A' and 'X' probably using grep ...
6
votes
2answers
342 views

Sorting with Perl respecting Locale Settings

Following data needs to be sorted respecting the locale sort order: wird sin wär pêche war Über Uber péché peach There was nor problem by using sort $ sort < data peach pêche péché sin Uber ...
1
vote
1answer
1k views

Adding timestamp before each STDOUT line inside perlscript

In a perl script, I am capturing all the STDOUT and STDERR using the below code: open STDOUT, '>>', "$log_file" or die "Can't redirect STDOUT: $!"; open STDERR, ">&STDOUT" or die "Can't ...
4
votes
4answers
532 views

How to switch the first letters of two words?

$ echo 'foo bar' | sed SOMEMAGIC boo far $ echo 'one two' | sed SOMEMAGIC tne owo Q: in general, how can I replace the "b" from the "bar" to the "f" of the "foo"? And in reverse too, replace the "f" ...
1
vote
3answers
2k views

Print the last-but-one field

How to print the word before the last word in line (with ksh or awk or sed or perl one liner) Example 1: echo one two three will print "two" Example 2: echo 1 2 3 4 5 6 will print "5"
3
votes
1answer
153 views

awk to split the input file into 2 files(one for duplicated values and one for unique values)

I have an input file like below. file.txt 14 2.692022 author1 0 14 2.57826 author2 1 229 2 author3 2 323 2 author4 3 514 2.0625 author5 4 I am trying to split the file with the duplicated values ...
1
vote
0answers
81 views

Better approach to generating and adding contents to files

I have an input file like below. 1 First one 2 First two 3 First three 3 Second three I am generating 2 output files like below. #FILE1 1 First one 2 First two 3 First three #FILE2 1 ...
0
votes
2answers
261 views

search for first pattern and copy the string inside the ( ) into the 3rd field in lines where the second pattern found

Here are my spec: first search for "#firstpattern(" copy the content inside the ( ) to the 3rd field inside the ( ) of all lines where the "secondpattern" found. remove the entire line with the "...
0
votes
0answers
67 views

replacement script multiple targets

I have this input file Name=code_229633_138;isoforms=1 Name=code_229633_138 Name=code_229633_138;Target=R77_09738T0 Name=code_230519_1;isoforms=1 Name=...
3
votes
2answers
2k views

case sensitive substitution; same target ids

I am struggled myself to make a case sensitive replacement in a text file. Please find below a segment of my sed file that I am running as sed -f file.sed < input.txt > output.txt s/\<...
2
votes
1answer
249 views

replace a pattern found with a number plus 1 on the same line

I have a file where each line contains a keyword (HELLO) and one or more numerical fields designated A1, A2, etc. The value in the numerical field is enclosed in brackets after the field name and is ...
0
votes
3answers
111 views

remove new lines

My input is a csv file like this: 10,"Special Projects,bangaram",0,,0 10,"Statutory/ Internal Audit , MO reporting (incl Excel Spreadsheet uploadation) ", bangaram,0,,0 10,"Complience with SVCCL",...
2
votes
3answers
177 views

grab multiple lines after a matching target line

This question is similar to How to show lines after each grep match until other specific match? thus answers may be similar to those there. I am trying to grab and extract from a file the lines that ...
2
votes
5answers
284 views

Can the string “abcedf” be matched to string “bafcde” in a single line command?

I am planning to implement an indexing structure in my program. For example, if I have 100 rows in the table, I will number these rows from 1 to 100 in another column by appending an _ to the end of ...
1
vote
4answers
1k views

Pattern Matching and Delete the whole line

I want to delete all the Lines of File 1, if Column1 of File1 matches exactly with Column 1 File2. File 1: r001:21:10 21 AAAAAATTTGC * = XM:21 r002:21:10 21 YAAAATTTGC * ...
6
votes
2answers
3k views

Replace string with sequential index

Can someone suggest an elegant way to accomplish this? Input: test instant () test instant () ... test instant () //total 1000 lines output should be: test instant1 () test ...
7
votes
2answers
5k views

Remove unknown unicode character from textfiles - sed, other bash/shell methods

I need to search and replace all occurences of an unknown character in some files having the same name. Opening such files with vi, I read <91> code for that character. Opening them with nano, I ...
2
votes
1answer
446 views

pcregrep fails due to segmentation fault

I am extracting the HTML source of a web page using the below command. curl http://www.linkedin.com/pub/ramesh-venkataraman/63/621/b42 -s | w3m -dump -T text/html > foo.txt The foo.txt has the ...
4
votes
4answers
19k views

extract only the substring after double quotes - grep

I have a file which is as below. <a href="http://firstlink.com" title="title1"> <a href="http://secondlink.com" title="title2"> <a href="http://thirdlink.com" title="title3"> <a ...
0
votes
1answer
1k views

Is Perl ever a better tool than awk for text processing [closed]

This question was inspired by a discussion on stackoverflow - see in particular the comment thread under Ed Morton's answer. I figured this was the site where I could get a definitive answer: In ...
-2
votes
2answers
9k views

how to run perl cgi script on apache [closed]

I Successfully installed Apache web server in my local machine. My question is how to run perl cgi script on this server Actully I don't have any Idea that's why posted question here. my sample cgi ...
5
votes
2answers
225 views

run perl script with unknown perl location

I'm developing a perl script which expected to be downloaded by Mac users with a very small knowledge of shell, linux etc, let's say office managers and accountants. After the downloading the script ...