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Commands tagged perl

Commands tagged perl from sorted by
Terminal - Commands tagged perl - 157 results
perl -e "tr/[A-Z]/[a-z]/;" -pi.save $(find . -type f)
2010-11-25 12:48:39
User: miccaman
Functions: find perl
Tags: perl find regex
0
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recursive transform all contents of files to lowercase
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pcharc(){ perl -e 'for (0..255) {$_ = chr($_); print if /['$1']/}' | cat -v; echo;}
2010-11-13 00:32:41
User: putnamhill
Functions: cat perl
Tags: perl
1
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print character classes

Today I needed a way to print various character classes to use as input for a program I was writing. Also a nice way to visualize character classes.

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pcregrep --color -M -N CRLF "owa_pattern\.\w+\W*\([^\)]*\)" source.sql
2010-11-11 12:53:40
User: hute37
Tags: perl grep regex
0
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Source multiline grep with pcregrep

grep multiline in Perl regexp syntax with pcregrep

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git status | perl -F'\s' -nale 'BEGIN { $a = 0 }; $a = 1 if $_ =~ /changed but not updated/i; print $F[-1] if ( $a && -f $F[-1] )'
2010-10-15 07:58:14
User: coffeeaddict_nl
Functions: perl
Tags: status git perl
0
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Show the changed files in your GIT repo

Parse the output of git status.

Once the line '# Changed but not updated:' has passed print every last part of the line if it exists on disk.

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diff <(perl -wpl -e '$_ =~ s/^\s+|\s+$//g ;' file1) <(perl -wpl -e '$_ =~ s/^\s+|\s+$//g ;' file2)
2010-10-06 19:14:42
User: jemptymethod
Functions: diff perl
Tags: bash diff perl
2
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diff files while disregarding indentation and trailing white space

**NOTE** Tekhne's alternative is much more succinct and its output conforms to the files actual contents rather than with white space removed

My command on the other hand uses bash process substitution (and "Minimal" Perl), instead of files, to first remove leading and trailing white space from lines, before diff'ing the streams. Very useful when differences in indentation, such as in programming source code files, may be irrelevant

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find . -iname '*.jpg' -type f -print0 |perl -0 -ne '$a+=-s $_;END{print "$a\n"}'
2010-09-12 13:14:12
User: unixmonkey10455
Functions: find perl
Tags: size perl find du filesize
1
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Summarize size of all files of given type in all subdirectories (in bytes)

This deals nicely with filenames containing special characters and can deal with more files than can fit on a commandline. It also avoids spawning du.

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perl -le 'chomp($w=`which $ARGV[0]`);$_=`file $w`;while(/link\b/){chomp($_=(split/`/,$_)[1]);chop$_;$w.=" -> $_";$_=`file $_`;}print "\n$w";' COMMAND_NAME
2010-07-30 19:26:35
User: dbbolton
Functions: perl
Tags: which perl binary file PATH command
0
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Show full path followed by a command

This will show you any links that a command follows (unlike 'file -L'), as well as the ultimate binary or script.

Put the name of the command at the very end; this will be passed to perl as the first argument.

For obvious reasons, this doesn't work with aliases or functions.

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echo "text" | hd
2010-07-20 15:40:52
User: Vilemirth
Functions: echo
Tags: perl hex ascii
1
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Convert ascii string to hex
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echo "text" | od -t x1
2010-07-14 14:53:25
User: max_allan
Functions: echo od
Tags: perl hex ascii
0
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Convert ascii string to hex

Just use "od" and it can also dump in decimal or octal.

(use -t x1 and not just -x or it confuses the byte order)

There is a load of other formatting options, I'm not sure if you can turn off the address at the start of the line.

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echo -n 'text' | perl -pe 's/(.)/sprintf("\\x%x", ord($1))/eg'
2010-07-14 12:20:42
User: putnamhill
Functions: echo perl
Tags: perl hex ascii
1
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Convert ascii string to hex

Here's a version that uses perl. If you'd like a trailing newline:

perl -pe 's/(.)/sprintf("\\x%x", ord($1))/eg; END {print "\n"}'
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perl -e 'print "\x41\x72\x74\x20\x6f\x66\x20\x68\x61\x63\x6b\x69\x6e\x67\x2e\x2e\x2e\n" x 100'
2010-07-11 16:32:00
User: gunslinger_
Functions: perl
Tags: perl shellcode
-15
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Art of hacking on perl

Print "Art of hacking..." 100 times by perl

or you can this tools : http://packetstormsecurity.org/shellcode/shellcodeencdec.py.txt

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cat file_with_tabs.txt | perl -pe 's/\t/ /g'
2010-07-11 13:01:22
User: nikc
Functions: cat perl
Tags: cat perl replace
-3
Up
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Replace tabs with spaces in file

Replaces tabs in output with spaces. Uses perl since sed seems to work differently across platforms.

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perl -MNet::Twitter -e '$nt = Net::Twitter->new(traits => [qw/API::REST/], username => "YOUR USERNAME", password => "YOUR PASSWORD"); $ud = $nt->update("YOUR TWEET");'
2010-06-16 19:46:05
User: dbbolton
Functions: perl
Tags: net twitter perl update tweet
2
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Update twitter with Perl

Requires Net::Twitter. Just replace the double quoted strings with the appropriate info.

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git log -p -z | perl -ln0e 'print if /[+-].*searchedstring/'
2010-06-13 07:41:22
User: takeshin
Functions: perl
Tags: git perl log search
1
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See all the commits for which searchstring appear in the git diff
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aptitude purge linux-image | grep ^i | grep -v $(uname -r)
2010-06-11 22:20:42
User: lgallardo
Functions: grep uname
Tags: Debian Linux perl kernel aptitude
-4
Up
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Remove all unused kernels with apt-get
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perl -e 'chomp($k=`uname -r`); for (</boot/vm*>) {s/^.*vmlinuz-($k)?//; $l.="linux-image-$_ ";} system "aptitude remove $l";'
2010-06-10 22:16:47
User: dbbolton
Functions: perl
Tags: Debian Linux perl kernel aptitude
1
Up
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Remove all unused kernels with apt-get

TIMTOWTDI

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for code in $(find . -type f -name '*.p[ml]'); do perl -c "$code"; done
2010-05-29 23:26:40
User: udog
Functions: find perl
Tags: perl directory syntax
0
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Check syntax of all Perl modules or scripts underneath the current directory

Finds all *.p[ml]-files and runs a perl -c on them, checking whether Perl thinks they are syntactically correct

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perl -e 'foreach (@ARGV) {@T=stat($_); print localtime($T[8])." - ".$_."\n"}'
2010-05-20 16:19:17
User: putnamhill
Functions: perl
Tags: perl solaris ls file time
0
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Print time and year of file in Solaris (or other Unix ls command that does not have a simple
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perl -e '@F = `ls -1`;while (<@F>){@T = stat($_);print "$_ = " . localtime($T[8]) . "\n";}'
2010-05-20 15:02:51
User: hckhckhck
Functions: perl
Tags: perl solaris ls file time
0
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Print time and year of file in Solaris (or other Unix ls command that does not have a simple "--full-list")

Solaris 'ls' command does not have a nice '--full-time' arg to make the time show after a year has passed. So I spit this out quick. It hates spaces in file names.

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perl -MDigest::SHA -e 'print substr( Digest::SHA::sha256_base64( time() ), 0, $ARGV[0] ) . "\n"' <length>
2010-04-30 21:45:46
User: udog
Functions: perl
Tags: perl password random base64 sha256
1
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Produce a pseudo random password with given length in base 64

Of course you will have to install Digest::SHA and perl before this will work :)

Maximum length is 43 for SHA256. If you need more, use SHA512 or the hexadecimal form: sha256_hex()

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echo $hex | perl -pe 's/(..)/chr(hex($1))/ge'
2010-04-17 16:24:48
User: dfaulkner
Functions: echo perl
Tags: perl strings hex ascii convert
0
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convert a string of hex characters into ascii chars
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perl -i -pe 's/\r/\n/g' file
2010-04-16 13:25:09
User: octopus
Functions: perl
Tags: Linux perl unix
0
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Legacy MacOS to Unix text convert using perl
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perldoc perllocal
2010-04-14 10:57:56
User: octopus
Tags: version perl
3
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List all installed PERL modules by CPAN

This command will give you the detailed information about the installed perl modules i.e. installed path, Link type, version, files etc.

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curl -s http://api.wunderground.com/auto/wui/geo/ForecastXML/index.xml?query=${@:-<YOURZIPORLOCATION>}|xmlstarlet sel -E utf-8 -t -m //forecast/txt_forecast/forecastday -v fcttext -n
2010-04-13 22:14:48
User: fanfani
Tags: perl curl function weather
-2
Up
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Get the weather forecast for the next 24 to 48 for your location.

you can use xmlstarlet to parse output instead of perl

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perl -MStatistics::Descriptive -alne 'my $stat = Statistics::Descriptive::Full->new; $stat->add_data(@F[1..4]); print $stat->variance' filename
2010-04-02 21:16:12
User: alperyilmaz
Functions: perl
Tags: statistics perl math
1
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statistics in one line

In this example, file contains five columns where first column is text. Variance is calculated for columns 2 - 5 by using perl module Statistics::Descriptive. There are many more statistical functions available in the module.

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