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.
130
questions with no upvoted or accepted answers
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How to create a custom Perl distribution
I would create a custom Perl distribution for perl-5.30.0.tar.gz.
I would include in the perl-5.30.0.tar.gz following Perl modules
HTML::Entities
HTML::Strip
Devel::CheckLib
Net::DNS
Mail::DKIM::...
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5
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0
answers
16k
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Installing custom RPM says "does not update installed package"
I've inherited some servers which have previously always had its software as custom compiled versions (apache, perl, mod_perl etc). I was thinking rather than compile every time, it may be better to ...
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4
votes
0
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Perl's `kill` is using `$! == Errno::EINTR` unexpectedly
I wrote a network daemon that forks off children to handle TCP connections.
On SIGINT the main process triggers a kill for each child in order to clean up and to collect some final statistics.
In ...
- 1,493
3
votes
1
answer
108
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OpenSSH session is killed when from Perl a syswrite call is made with an empty variable in Solaris 11
We have a strange problem in Solaris 11.4.
The problem arise when a code as the following is run from Perl
my $emptystring = "";
syswrite STDOUT, $emptystring;
The execution of a syswrite ...
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3
votes
1
answer
566
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Is it possible to get the apache server-status page without sending a GET request to one of the workers?
I have the server-status page setup and can access it through
http://localhost/server-status and commands like apache2ctl status.
Is there a way to access the infromation in the server-status page ...
- 329
2
votes
0
answers
100
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Processing large blocklists with GNU Parallel
This is an ongoing project that has undergone a major update to speed up list processing. Here is the homepage for anyone interested!
It processes lists defined in lists.json by transforming the list ...
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2
votes
2
answers
140
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List a file from all directories but skip the ones whose folder contains a specific file
I have a perl script that processes .xml files which reside in multiple folders under a directory. The script takes the absolute file path using the output of ls using parallel.
parallel -j 1 /home/...
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2
votes
1
answer
244
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uniq -c Equivalent for Groups of Lines of Arbitrary Count
I've got a file of ~1-2 million lines that I'm trying to reduce down by counting duplicate groups of lines, preserving order.
uniq -c works okay :
$ perl -E 'say for (("foo") x 4, ("bar") x 4, "baz"...
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2
votes
2
answers
161
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Perl script giving different output on bash shell in Linux and /sbin/sh shell on HP unix
Input:
tmp# cat test5
1234 012345
0.000 01234
01/02/03 5467
01234 0123
05554567 234
0099
0000 000054
Output on Bash Shell:
[tmp]# perl -lpe 's#(^|...
- 21
2
votes
1
answer
253
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replacing values in one with the values in another file
I have a csv file named eche in following format:
INCON,--,INITIAL,CONDITIONS,FOR*****,ELEMENTS,AT,TIME ,0.315570E+13
VC76,0.10000000E+00,0.2837726135782E+08,0.6756896308414E+02
1K02,0.10000000E+00,0....
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2
votes
2
answers
707
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merge multiple files based on first column and save memory issues
I have multiple tab delimited fastq files. I want to match the second line of each read and add up the values next to it if it matches.
for example:
file1.fq
>1
ATGCCGTT file1:1
+
HHHHKKKK
...
- 21
2
votes
1
answer
303
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Make a rpm package from the cpan compatible tree?
I always make my perl module following the CPAN-complient tree. I would like to use this tree to create a rpm file I could install on a hundreth servers.
Is it possible to make a rpm package with ...
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2
votes
0
answers
141
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Some errors have occured when I installed lucene, a perl module!
Some errors have occured when I installed lucene, a perl module:
[xlwang@localhost Lucene-0.18]$ make test
Running Mkbootstrap for Lucene ()
chmod 644 Lucene.bs
PERL_DL_NONLAZY=1 /home/xlwang/local/...
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1
vote
0
answers
17
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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 ...
1
vote
1
answer
54
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how to catch output from a subprocess?
I am trying to catch the password prompt of sftp, but somehow it is not from STDIN or STDERR. It possibly comes from a sub-process.
The following is my test. I tried to redirect the password prompt to ...
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