Questions tagged [perl]
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 graphics programming, system administration, network programming, finance, bioinformatics, and other engineering applications.
1,376 questions
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Fedora 40 - Apache Perl CGI - Open for writing fails
Last week, I upgraded my Linux file server from Fedora 39 to Fedora 40, and several CGI applications written in Perl stopped working. I first noticed it when Foswiki could not show any pages, because ...
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Combining multiple files by year (column in data) into one line and add file name as first column in Perl or Python
I have over 3000 files that need to be combined based on specific attributes in the files. For example, each file is named by its ID (Eg. 101567AD_Mly.txt).These IDs correspond to latitude and ...
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make master/slave ip in different subnet
For reference, this is a follow-up and variation on group ip address to different subnet with shell
We have two strings (named master/slave), the two strings are composed with IPS spread in three ...
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grep specified variable from a file [closed]
I have a variable like
master='172.21.154.37 172.21.250.94 172.21.251.93 172.21.250.94'
and I need to check whether the first and the second column in the file both matches the variable. The following ...
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how to extract useragent complete (has spaces) from logfile
logfile line
4/10/2024--06:00pm guest 192.168.1.2 https://nixnut.nz/home/accounts/hosting.cgi?action=getonline Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0
in logview file i ...
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regex to detect two consecutive lines that have the same words in the same order, but different spaces at leading, trailing and between words
I want to find a regex or perl oneliner to detect two consecutive lines that have the same words in the same order, but the leading spaces, trailing spaces and amount of spaces between the words may ...
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How to replace pattern in last line
I'm trying to replace "}," by "}" from the last line of a file :
My /etc/firefox/policies/policies.json file like this because I added the certificate lines using a for loop :
$ ...
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Symbol lookup error for List::Util Perl module after RHEL7 to RHEL8 upgrade
we have recently upgraded our system from RHEL7 to RHEL8 , and when executing below command we are getting error
RHEL7.9 = Perl 5.16.3
RHEL8.10 = Perl 5.26.3
Command 1:
perl -MList::Util -e 'print &...
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perl: Use "-" for standard input with 3-arg open
The old 2-arg version of open (i.e., open FILEHANDLE,EXPR) to open a file in perl is deprecated. For security reasons, it should be replaced by the 3-arg version open FILEHANDLE,MODE,EXPR. There is ...
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Why does this Perl Regex one-liner not respect the \U escape sequence?
Why does this Perl Regex one-liner not make the full result upper case using the \U modifier?
I expect MY_NICE_WORD.
$ perl -pe 's/(?<=[a-z])(?=[A-Z])|(?<=[A-Z])(?=[A-Z][a-z])/\U$1_$2\E/g' <(...
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Remove duplicate but uncomplete strings of text
I have a hard time figuring out how to remove duplicate but incomplete strings of text. No success using perl, awk or sed.
I need to transform:
a b
a b c
a b c d
a b c d e
a b c d x
a b c d z
into
a ...
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Where are Perl arrays @0, @9999 documented?
$ perl -wle 'my @388=0..2;'
Can't use global @388 in "my" at -e line 1, near "my @388"
Execution of -e aborted due to compilation errors.
$ perl -wle '@388=0..2;'
$
Where can I ...
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Problem enabling perl module stream AlmaLinux 8.10
I have an issue with our AlmaLinux 8.10 systems that they suddenly have issues with perl dependancies. It tuns out that the current active perl stream is 5.26 (dnf module list perl*) but some packages ...
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Delete 2-line paragraphs, keep 3-line paragraphs, maintain newline between all
On a Linux machine with GNU tools I have an ascii file that consists of only 2-line and 3-line paragraphs, each paragraph separated by a newline. All 2-line paragraphs are to be deleted so that all 3-...
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version `XCRYPT_2.0' not found after Update Debian 10 to Debian 12
I was instructed to upgrade Debian 10 to Debian 12. After the upgrade, I noticed that the ssh.service was not working. Now I found out that no 'apt' commands work. I can't install anything.
Here the ...
