Questions tagged [perl]
Perl is a powerful, high level programming language. Questions about Perl should be limited to the Perl development environment, running Perl, or using Perl to automate tasks on your computer.
501
questions
0
votes
1
answer
220
views
How to get stock quotes in KMyMoney, GNUCash, or other programs using old/broken perl Finance::Quote
TLDR: I am unable to get online stock quotes from within GnuCash and KMyMoney. It seems that something is wrong with the perl Finance::Quote module. What is the easiest way to fix this?
Background
...
- 139
3
votes
3
answers
663
views
Bash [[ test =~ regex ]] vs perl command result
Is the bash operator =~ equivalent to a perl invocation?
filename="test-33.csv"
regex="([^.]+)(-\d{1,5})(\.csv)"
With bash test:
if [[ "$filename" =~ $regex ]]; then ...
- 133
2
votes
1
answer
340
views
Install Perl on Windows for LaTeX Packages Without Dependency Issues
I'm currently facing challenges with installing Perl on my Windows system, which I need for handling specific LaTeX related packages. My journey so far has led me through a series of issues, and I'm ...
- 682
0
votes
1
answer
62
views
database connection error with perl app (rt 5 - request tracker) connecting to Postgres database
On a CentOS 9 system I installed postgres via dnf
# dnf info postgresql
Last metadata expiration check: 3:26:33 ago on Tue 21 Nov 2023 12:13:48 PM PST.
Installed Packages
Name : postgresql
...
- 11
0
votes
1
answer
68
views
AWK replace some special new line to one line
i have some log like this:
2023-11-15T08:59:28.000000+00:00 database-1 # Time: 231115 8:59:28
# User@Host: rdsadmin[rdsadmin] @ localhost []
# Thread_id: 3 Schema: QC_hit: No
# Query_time: 0....
- 1
0
votes
0
answers
115
views
Perform lookup on two files
I have a csv file that get's SFTP'd to a RHEL box I have setup. It then gets transformed a little before another process SFTP's in and grabs it sending it off to be imported to a DB of a 3rd party.
I ...
- 1
1
vote
1
answer
454
views
Combine two regex formulas into one (using notepad++)
Si cum îi semănau ! Fraţi buni, puindu-si, ca si el, tot sufletul
în ceea ce făceau, muncind din greu, luptind din greu, jert-
findu-se, fără nici un gînd de răsplată.
Simțind în tot ceasul,
...
- 866
2
votes
4
answers
342
views
REGEX Find the string between 2 strings
In the example below, I want to use regex as to find the html tag <sony> between other 2 lines.
<table width="697" border="0">
<tr>
<td&...
- 119
2
votes
0
answers
400
views
Clear previous command output (not full screen)
Example
This is on the terminal screen:
user@host ~ % ls
dir1
dir2
dir3
user@host ~ % whoami
user
user@host ~ % date
Wed May 24 16:25:26 -03 2023
user@host ~ % [CURSOR IS HERE]
I'm trying to ...
- 69
0
votes
1
answer
769
views
How to install Perl modules in custom location?
I'm currently trying to install a Perl module, but the web hosting has specifically locked the custom Perl user install directory (they have a "install service" charging 7$ per module).
So ...
- 1,031
0
votes
1
answer
54
views
regexp in perl fails
Why is this failing?
WGroleau@MBP Chords % perl -p -i -e '(Trinidad|Donoso|Clifton|Frincke|Little|Church|Antonio) XYZ :\1\t:g;' *txt
Bareword found where operator expected at -e line 1, near ") ...
- 824
0
votes
1
answer
106
views
Perl LWP: how can I print the fetched result?
What are the elements of the class response from this code:
Or, how can I print the entire object response ?
#!/usr/bin/env perl
# Example code from Chapter 1 of /Perl and LWP/ by Sean M. Burke
# ...
- 39
1
vote
1
answer
245
views
Perl LWP: running a script returns an error
I have installed Bundle::LWP and after several minuets I'm getting this
$ perl -MLWP -le "print(LWP->VERSION)"
6.68
which sounds OK. However, running this script
#!/usr/bin/perl
# ...
- 39
0
votes
1
answer
424
views
Add line number at the end of each line in a text file
I have a text file which contains thousands of lines with same links. I want append the line number at the end of each line. For example;
https://example.com/
https://example.com/
these links would ...
0
votes
1
answer
54
views
Linux - Find string and then end of section
I have an XMLTV file. I need to get all of the programme sections for a specific channel. An example snippet:
<programme start="2023031305000 -0400" end="2023031305300 -0400&...
1
vote
1
answer
400
views
How to find the "pattern" in FASTA file and record the cordinates along with header
I am looking for a solution to search for a string of 17 base pairs in the FASTA file that is the human reference genome.
To clarify, in simple words and put the resources, i have tried grep function ...
- 13
1
vote
1
answer
94
views
Cygwin Perl autodie 'not located'
I have Cygwin installed (with its native Perl support). However, on running a make file supplied by a third-party, I get the following error:
Can't locate autodie.pm in @INC (you may need to install ...
1
vote
1
answer
57
views
perl extended regex pattern with (condition) behaves wrong, what I do false?
I use perl --version
perl 5, version 36, subversion 0 (v5.36.0) built for i686-linux-gnu-thread-multi-64int (with 52 registered patches
I have used following test lines with these results:
perl -we '$...
- 161
0
votes
1
answer
35
views
Perl RexEx Replace locks Apache access_log
I wanted to clean up my apache server logs, remove all the 301, 404, and so on, and after trying and failing with sed, I used Perl, which worked wonderfully, except... Then Apache no longer logs ...
- 525
0
votes
3
answers
202
views
Replacing double new-line in multiple files
I do a lot of text cleanup with (example) perl -p -i -e 's:old:new:g;' *.txt but when old is \n\n and new is \n</p><p>\n, nothing changes. Tried escaping the angle brackets, but that didn'...
- 824
3
votes
1
answer
9k
views
What does --allowerasing option in dnf command do?
I am reading a book which instructs me to install 5.24stream and minimal profile of Perl module by running...
dnf module install perl:5.24/minimal --allowerasing
Everything was explained in it except ...
- 31
0
votes
0
answers
20
views
Looking for an efficient way to query "perldelta"s for news
A common problem I have with Perl is this:
I want to find out at which release some feature had been introduced.
There were several "perldelta" manual pages (one for each release), but I'm ...
- 705
2
votes
2
answers
126
views
Find and delete near duplicate lines with certain punctuation
I have a text file with millions of lines. Some lines contain the same alphanumeric sequence, but differ in case and punctuation. I consider these lines duplicates. I want to remove any duplicate line ...
- 35
0
votes
1
answer
415
views
Perl regex unable to match using hex or octal
I need to use Perl to work with a data file that contains a lot of unprintable characters, i.e. not within the displayable character range in the ASCII table. I tried writing regexes using octal ...
- 1
0
votes
1
answer
218
views
quote mark (U+0027) in perl substitution
I need to put two spaces between sentences in a large number of text files.
A sentence ending is defined as period, exclamation, or question, maybe a close-quote, and then a space. Tabs and line ...
- 824
0
votes
2
answers
818
views
Trouble with perl and UTF-8
If I interpret documentation ci=orrectly, perl --CSD is suppose to ensure that input and output, processed or commands, are using UTF-8 encoding.
But if I replace two hyphens -- with an em-dash — (U+...
- 824
1
vote
1
answer
47
views
How do I substitute the entire line in a text file for a portion of text in the line?
For example, I would like to make:
>sid|RSV210|ref|NC_001803.1| SM:RSV210
turn into
>RSV210
I believe that I could use sed to do this by the following
"s/>.*/>RSV210/"
but I ...
0
votes
1
answer
220
views
how can I put 2 files with the same number of lines side by side with Perl
how can I put 2 files A and B with the same number of lines side by side with Perl with
command line ? I cannot work with two filehandles on the command line.
0
votes
1
answer
39
views
Perl RE global matching is not working /.*(11).*/g
I have a file containing this single line:
111112111122113
I want to match all two element sequences of 1 in all occurrences.
But when I try this
$ perl -lne 'print $1 if /.*(11).*/g' u
I get only ...
0
votes
2
answers
643
views
Remove the file name from a messy path in a text file awk or sed
I have an xml file with many lines containing something like this:
Save="C:\Users\Administrator\Desktop\my files\1020\A54f\Drawing965.DWG" Module="0"
Save="C:\Users\...
- 35
0
votes
0
answers
161
views
Perl, modifiers /m /s/ /ms
I have seen in Larry's Wall book programming Perl 3rd edition what do the modifiers
/s
/m
/ms
in some example with \n . Now I cannot find the exact page.
Specifically the example showed that only the ...
- 161
0
votes
2
answers
81
views
opendmarc: hostnamefqdn() shows only short name / helo command rejected fqdn
I have problem with opendmarc. This software uses perl function to send report mails. So in the source code I see that /etc/opendmarc_reports uses also function hostnamefqdn() to pass it to helo ...
- 1
0
votes
1
answer
546
views
500 Internal Server Error when run perl file and no access to command line
I'm a newbie with Perl. I've created a simple file test.pl with the code:
#!/usr/bin/perl
print 'test';
uploaded it to my shared hosting with Linux where PERL is enabled and changed my PERL file ...
- 269
0
votes
1
answer
277
views
Why does this regexp — which attempts to match characters between “@” characters — fail?
I need to extract the second field of selected lines in a GEDCOM file. These lines are all of the following format:
% grep @ /tmp/XYZ | tail -5
0 @X701@ OBJE
0 @X702@ OBJE
0 @X750@ OBJE
0 @X765@ OBJE
...
- 824
-1
votes
1
answer
157
views
Need to autoincrement directory names but by avoiding some letters in the name
My script creates a set of directories aa, ab, ac, and so on
This script autoincrement directory names but I want to avoid the letters: I, O, P, Q, R, W while creating directories.
The script which I ...
- 3
1
vote
1
answer
765
views
Unable to install DBD::mysql on Ubuntu 20.04
I am unable to get DBD::mysql installed on Ubuntu 20.04. I get the following error:
Warning: No success on command[/usr/bin/perl Makefile.PL LIB=/home/htm/Lib]
DVEEDEN/DBD-mysql-4.050.tar.gz
/usr/bin/...
- 21
0
votes
1
answer
201
views
Sending args from bash to perl
I eally need help
I would like to send args from bash file to perl file. I dont know why it is not working for me. My code foe testing is bellow
*******bash code *********
#!/usr/bin/env bash
chmod +...
0
votes
1
answer
52
views
a very simple Perl script needed
I have the following text file G.txt.
I need a perl command
perl -e ...
that would extract all negative entries ending with Kč, so that first line it will be
-107,60
and last will be -63,00
I have ...
0
votes
1
answer
337
views
Combining two txt files containing name and last name on command line
I have two text files. First file have 20 Names listed in seperate lines and 2nd file have 20 surnames listed in seperated lines. How I can combine those files. So final text file have both first name ...
- 354
1
vote
1
answer
936
views
How to make fork() fail?
For a script I'm writing, it's important to properly handle a failed fork() (see https://rachelbythebay.com/w/2014/08/19/fork/ for the Why).
But how, without bringing my system down with processes, ...
0
votes
0
answers
174
views
Reading email headers in Perl
I have an email account ([email protected]) and an alias ([email protected]) pointing to the account.
An email sent to [email protected] is delivered to [email protected] as expected.
Email headers in MS ...
- 21
0
votes
1
answer
81
views
Perl/Bash Solution to Test if a Folder Has Changed, Then Create Copy of It
I'd like to put together a script for a very rudimentary backup system that checks a directory recursively for any changes since the date another directory (the backup) was created and, if it finds ...
3
votes
0
answers
43
views
How to rename a perlbrew installed version
I installed Perl 5.32 with the name perl-5.32.0
$ perlbrew list
* perl-5.32.0
The installation was updated with perlbrew upgrade-perl and I now have 5.32.1
$ perl --version
This is perl 5, version ...
- 7,897
2
votes
1
answer
111
views
Shell special chars blowing up regexp(s) in all: sed, (g)awk, and perl [closed]
I would like to change the PS1 in my ~/.bashrc programmatically with any of the the most popular regexp tools { sed, awk or perl }. However, I have problems with special characters. Note that in the ...
- 21
0
votes
1
answer
156
views
Transpose vertically with a catch
I've been working through some issues preparing data for logstash ingestion. I have a decent chunk of the process worked out but I'm wondering if there's a better way to do this. Basically I need to ...
4
votes
2
answers
9k
views
Is there a way to execute a perl script from any location in the machine?
I'd like to know if there are other ways to execute a perl file without giving the path explicitly.
example:
perl ./images/seed/test.pl
I read on the export path command but I don't quite understand. ...
- 43
1
vote
1
answer
588
views
How do I upgrade SpamAssassin?
When I try to update SpamAssassin, it says it has the latest version.
# cpanm Mail::SpamAssassin
Mail::SpamAssassin is up to date. (3.004004)
However, the latest version says it is 3.4.4. https://...
- 6,046
1
vote
2
answers
996
views
Regex to substitute character with numbers around it in filenames with rename utility (perl based)
I would like to rename files that have the following format:
somethingblabla15T06:58_31+0000somethingblabla.bla
THe new name should be
somethingblabla15T06:58:31+0000somethingblabla.bla
So the _ ...
2
votes
1
answer
533
views
How to print absolute path of some file from c:\ root in perl?
Having this perl:
#!/usr/bin/perl -w
use Cwd qw[abs_path];
use autodie;
opendir C, "c:\\";
@ar = map { abs_path($_) } readdir(C) or die $!;
print $ar[0];
I am trying to print an absolute ...
- 371
2
votes
2
answers
650
views
Combine strings with same first word preserving their order
I have a file that contain many lines consecutive and non consecutive with same first word and i want to merge all those lines.Not finding any way. please suggest someone.
eg.
cat file
X blah blah ...
- 121