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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3
votes
1answer
96 views

Replace non-printable characters in perl and sed

I need to replace some non-printable characters with spaces in file. Specifically, all characters from 0x00 up to 0x1F, except 0x09 (TAB), 0x0A (new line), 0x0D (CR) Up until now, I just needed to ...
-1
votes
0answers
22 views

perl script to parse XML with various usages [on hold]

I want a perl script to parse XML files with various usages like parsing through a node and element, find attribute values, check if node exist in an appropriate path (xpath) etc.. The script is ...
2
votes
0answers
22 views

Any sumfunc in Perl by default [migrated]

Code sub sumfunc { my (@x) = @_; my $sum = 0; for(my $i=0; $i<=$#x; $i++) { $sum += $x[$i]; } return $sum; } Use my $Sx = sumfunc(@x); How can you do sumfunc better? ...
0
votes
3answers
23 views

To improve this regex about digit separation

Code m/([+-]?\d+\.\d+)[\s\t]+([+-]?\d+\.\d+)/ Data 22.585698 3601.767090 D:\measurements\LabCourse_2015\6\90deg\image0001_23_mT.png 20.051883 3580.268555 ...
1
vote
1answer
32 views

Synchronize columns of two matrices

Please guide on how to solve this problem. I have pairs of files which I need to modify so that they have the same common columns in the same sequence. If my files are File1 and File2 as follows ...
1
vote
0answers
23 views

cpan modules not installed correctly, what's wrong? [closed]

I try to install cpan modules and they install successfully /usr/bin/make install -- OK Then when I try to install a module that depends on them, I get x dependencies missing ...
0
votes
1answer
49 views

“Cannot install Nagios::Plugin, don't know what it is.”

I used this command to install Nagios::Plugins on multiple servers months/weeks before: perl -MCPAN -e 'install Nagios::Plugin' Now I get this error message: Reading '/root/.cpan/Metadata' ...
1
vote
1answer
33 views

Merging rows with common values

I am trying to combine pairwise matches in a text file so that i can find all matches in a group: e.g. my file contains two tab separated columns like this: Simon John Simon Paul Steve Simon Graham ...
0
votes
1answer
29 views

Multiple input files and output files in awk

I have a folder full of text files named 000.txt to 181.txt. How can I process all of them with the same awk script (program.awk) and send them to their respective output files (output000.txt - ...
0
votes
1answer
57 views

make a table output

if it possible to do a snmpwalk in a perl script and put the output in a table to make a sort of association like for each hostname i have in the same line if index and desc i have the script in bash ...
2
votes
2answers
39 views

Release memory in perl script

I want all this combinations but I don't have enough memory. How can I release memory in my script? use strict; use warnings; use Algorithm::Combinatorics 'variations_with_repetition'; my @let = ...
3
votes
3answers
80 views

Match lines of a file with headers in other to obtain entire para

I want help with scripting to work with two files, wherein file 1 lists amino acids which are in specific order (one below the other and also might repeat) and the second file 2 constitutes the ...
0
votes
3answers
60 views

Filtering multi-lines from a log

Should this question be moved to stackoverflow instead? I often need to read log files generated by java applications using log4j. Usually, a logged message (let's call it a log entry) spans over ...
-5
votes
2answers
62 views

How to average a column in a text file without using ' character? [closed]

I need to do it without using the ' character. I could do it like this: awk '{sum+=$5} END { print "Average = ",sum/NR}' except this contains a '.
3
votes
4answers
491 views

Is is possible to modify a file in a read only directory? [duplicate]

I have already read: Is there a way to modify a file in-place? I am curious if there is a way to modify a file in place using a command that will not create temporary files. Let's say I create a ...
2
votes
2answers
36 views

Perl non-greedy regex matching more than it should

I have the following text from which I need to remove some wdiff output. text='Иса Мәсіхтің елшісі Петірден [-(-] осы күнәкар дүниеде [-)-] жат жерлік болып, Понти, Ғалатия, [-Қападоқия, Азия және ...
4
votes
3answers
130 views

Remove duplicate lines while keeping the order of the lines

[root@server]# awk '!seen[$0]++' out.txt > cleaned awk: (FILENAME=out.txt FNR=8547098) fatal error: internal error Aborted [root@server]# The ""server"" has: 8 GByte RAM + 16 GByte SWAP, x>300 ...
0
votes
4answers
64 views

How to remove line based on Delimeter in perl / Shell?

Can anyone help to remove the line in file based on delimeter(Comma), Incase if line contain less number of columns or Bad records , Need to delete those. Input File: a,b,c,d a,b,d,f c,d a,v,b,h ...
-1
votes
1answer
33 views

Spreadsheet::ParseExcel [closed]

I am using Spreadsheet::ParseExcel, and want to take the file name as an input from the user. Moreover, I want the parsing of two files to happen based on a condition provided by the user. This is ...
12
votes
9answers
3k views

Is using “while true” to keep a script alive a good idea?

I'm just jumping into unix from a different world, and wanted to know if while true do /someperlscript.pl done The perl script itself internally has a folder/file watcher that executes when ...
1
vote
1answer
38 views

How to match parameter and replace the value after “=” separator

the perl one liner command to replace Value in file is simple: perl -i 's/oldval/newval/g' file.txt but what should be the perl one liner syntax in case we want to replace the value on specific ...
1
vote
1answer
41 views

awk script to rearrange similar rows

I want rearrange about 5 million rows (with 300 columns) into groups. Data looks like the following: where there were various experiments (column 2) conducted at different locations (column headers ...
-1
votes
1answer
42 views

Is it possible to get static backreference with grep?

I try to match a a group twice in multiline. grep -Pz 'Source: (?<group>.*/).*\n.*\n.*\n.*\k<group>|$' it work except one major problem - it doesn't, \k<group> search for .*/ and ...
4
votes
2answers
59 views

How exactly does perl's -0 option work?

According to man perlrun: -0[octal/hexadecimal] specifies the input record separator ($/) as an octal or hexadecimal number. If there are no digits, the null character is the ...
0
votes
1answer
25 views

How to pass parameters in a cgi-perl on Fedora 20?

I'm using Apache server on Fedora-20. I'm trying to run a perl-cgi program on my local server, but it's not working, I have attached my html and perl code. html program: <html> ...
1
vote
1answer
139 views

bash bad interpreter and permission denied

I installed RHEL 5.1 on a virtual machine. I would like to install VMware Tools, but I keep getting an error. I am performing the installation via the tar procedure. I get the following error: bash: ...
2
votes
3answers
97 views

How to run multiple scripts in parallel

I have one bash script which calls the same perl scrips in a serial way. The bash script is used to collect the overall results, while the perl script collects the results of my simulations for the ...
3
votes
2answers
253 views

remove ^M from solaris by perl one liner on the same file

usually in order to remove the ^M from file we do dos2unix test.txt test.txt tr -d '\r' < old.file > new.file but this approach insist to create new file if we do not want to create another ...
1
vote
3answers
148 views

how to delete line from the XML file

how to delete only the line from xml file ( with sed/awk or perl one liner line ) that start with: <units> and ended with </Networks> as the follwoing <units><unit ip= ...
1
vote
1answer
54 views

smd5 - generate by unix tool or perl

I have problem on Unix, have to create a lot of passwords in smd5 but don't know how to generate smd5 passwords using some unix tool or perl in a form: {smd5}DoZgZ.OE$vSg4ZH7Bpy0BCdXNzBj001 I have ...
1
vote
1answer
48 views

How to pass a path to a file through a call to perl from bash?

This is a more advanced version of a previous question (How to pass arguments to perl when trying to change a line?) I made. This time I am trying to pass a path, but evertything seems that the the ...
0
votes
2answers
33 views

How to pass arguments to perl when trying to change a line?

I am using the approach suggested in http://askubuntu.com/questions/434051/how-to-replace-a-string-on-the-5th-line-of-multiple-text-files to modify the first line of an archive. Let's suppose the ...
4
votes
1answer
38 views

ack.pl tool and ack.pl flags

I am using the ack.pl tool in order to search string or IP’s in files The official site of ack.pl is - http://beyondgrep.com/documentation/ Example of ack.pl CLI ( want to find the string ...
0
votes
5answers
134 views

To remove \n but not \n\n

Data 23. Lorem A) he B) ha C) hu c 2. Ipsun yes right to write something here? A) Ok B) No C) yes b 292. Ipsun A) Apex B) hello b 289. He A) hu B) Ha C) He The right answer is: 1) Ab 2) Abc 3) ...
1
vote
1answer
34 views

How do I synchronize 2 xml files?

I have 2 xml files named 1k.xml and 1n.xml. The file 1k.xml contains some additional elements and data which are not there in 1n.xml. I want to copy whatever is absent in 1n.xml to it, so that both ...
0
votes
1answer
48 views

Parse header in a file and based on the header replace a value in the file

I have a problem I need help with. I'm not very experienced with awk, but it seems to be a good tool for this job. I have the following file Field1|Field2|Field3|Field4|Field5 a|b|c|d|e 1|2|3|4|5 ...
1
vote
1answer
41 views

How to print incremental count of occurrences of unique values in column 1

I'm trying to come up with an solution to this problem, I need to incrementally count and then print the counts of the unique values in column 1 of a tab delimited text file. Here is an example: ...
2
votes
1answer
47 views

nix package manager: perl warning: Setting locale failed

Whenever I run a command for the nix package manager (e.g. nix-channel --update) I get the following warning: perl: warning: Setting locale failed. perl: warning: Please check that your locale ...
5
votes
2answers
134 views

Transpose a file, and replace missing values

I have Readings for Names, from Machines and sometimes these readings are replicated. Where a reading was not found, it is left as blank. Name Instrument Rep R1 R2 R3 N1 I1 1 1 2 3 N2 I1 1 1 3 4 ...
1
vote
1answer
18 views

Rename command with non-existing target directory

I'm trying to group files automatically into subdirectories using a command like this: $ rename 's/(.)(.)(.+)/$1\/$2\/$1$2$3/' *.* A dry run with the -n parameter shows me what I want: test.jpg ...
0
votes
1answer
26 views

how to change several piece of html code

I have several chunks of html code ,see below, in a html page that I need to change Assurez-vous de bien recevoir tous nos messages en ajoutant bebeco@concretisezvosprojets.com à votre carnet ...
2
votes
2answers
45 views

How do I extract the content of quoted strings from a file

have a file which looks like this: anm="12S123S" family="" type="Std" product="" name="nand" allow="yes" anm="12321 S=" family="" type="Std" product="" name="dan" need="No" anm="SWED" family="" ...
1
vote
4answers
125 views

How to insert a variable in a variable in a random place?

Q: How can I insert variable $b to a truly random place in variable $a? Example INPUT variable content: $ echo $a árvíztűrő tükörfúrógép $ echo $b ZZ OUTPUT $ ./somemagicscript.sh árvíztűrő ...
4
votes
2answers
63 views

How to “grep” for line length in a given range?

I need to get only the lines from a textfile (a wordlist, separated with newline) that has a length range of minimum or equal than 3 characters, but not longer or equal then 10. Example: INPUT: ...
2
votes
1answer
52 views

how can I add an extra character after a word search [closed]

I have the following field names demelog voyapro naisjdf naismc decoide decoccm travide travccm equiccm mariccm Below is a sample of my file. There are more columns before the first fck=83... ...
4
votes
3answers
217 views

Can tr commands be chained to avoid multiple tr processes in a pipeline?

I have a bunch of txt files, I'd like to output them lower-cased, only alphabetic and one word-per line, I can do it with several tr commands in a pipeline like this: tr -d '[:punct:]' ...
2
votes
4answers
100 views

How to highlight given string in given place?

How can we modify this: <a href="http://foo.bar1">asfdlksafbar1qsasadf</a><br> <a href="http://foo.bar2">svasfbar2saldkfj</a><br> <a ...
0
votes
2answers
94 views

Help to read a flat file into unix and output to simplified csv like format for import into excel

I have a text file that has data written to it in the format below, its thousands of rows. The new record always begins with WHATEVER.RDNDISPLAY or WHATEVER.DSPLY_NAME. The name of the record is ...
2
votes
3answers
221 views

Replace multiline string in files

I have a number of files I want to update by replacing one multi-line string with another multi-line string. Something along the lines of: * Some text, * something else * another thing And I want ...
0
votes
1answer
119 views

lwp-request Fails After Upgrade to Centos 7

I have a bash script that runs well on centos 6, which has an lwp-request in it. I upgraded my system to Centos 7, and the request fails to run: # lwp-request -E https://localhost/admin/startup GET ...