Commands tagged perl (190)
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-1mtr www.google.com
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Returns yesterday's date in the format yyyyMMdd
-2YEST=`perl -w -e '@yest=localtime(time-86400);printf "%d%.2d%.2d",$yest[5]+1900,$yest[4]+1,$yest[3];'` -
Returns tomorrow's date in the format yyyyMMdd
-2TOM=`perl -w -e '@tom=localtime(time+86400);printf "%d%.2d%.2d",$tom[5]+1900,$tom[4]+1,$tom[3];'` -
same, except it works on any OS with Perl installed. DOS, Windose, whatever
-2perl -pi -e 's/([[:lower:]]+)/uc $1/gsex' file -
you can use xmlstarlet to parse output instead of perl
-2curl -s http://api.wunderground.com/auto/wui/geo/ForecastXML/index.xml?query=${@:-<YOURZIPORLOCATION>}|xmlstarlet sel -E utf-8 -t -m //forecast/txt_forecast/forecastday -v fcttext -n -
PmWiki stores wiki pages as Group.Name. Simply split the directory listing and count frequency of group occurances. Show Sample Output
-2cd /path/to/pmwiki/wiki.d;/bin/ls -1 | perl -ne 'my ($group,$name)=split(/\./);$counts{$group}++;' -e 'END { foreach $group (sort keys %counts) {printf("%d\t%s\n",$counts{$group},$group);} }'|sort -rn -
A different approach to the problem - maintain a small sorted list, print the largest as we go, then the top 10 at the end. I often find that the find and sort take a long time, and the large file might appear near the start of the find. By printing as we go, I get better feedback. The sort used in this will be much slower on perls older than 5.8. Show Sample Output
-2find . -type f|perl -lne '@x=sort {$b->[0]<=>$a->[0]}[(stat($_))[7],$_],@x;splice(@x,11);print "@{$x[0]}";END{for(@x){print "@$_"}' -
This version uses a bash function and does not print the path to the module. Show Sample Output
-2module_exists(){ perl -e 'use '$1 2>/dev/null; } -
For all lines, sum the columns following the first one, and then print the first column plus the sum of all the other columns. example input: 1,2,3,4,5 2,2,3,4,5 becomes 1,14 2,14
-2perl -ne '@a=split(/,/); $b=0; foreach $r (1..$#a){ $b+=$a[$r] } print "$a[0],$b\n"' -f file.csv -
-3perl -e 'use Date::Calc qw(Today Week_Number); $weekn = Week_Number(Today); print "$weekn\n"'
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Replaces tabs in output with spaces. Uses perl since sed seems to work differently across platforms.
-3cat file_with_tabs.txt | perl -pe 's/\t/ /g' -
This command might not be useful for most of us, I just wanted to share it to show power of command line. Download simple text version of novel David Copperfield from Poject Gutenberg and then generate a single column of words after which occurences of each word is counted by sort | uniq -c combination. This command removes numbers and single characters from count. I'm sure you can write a shorter version. Show Sample Output
-4wget -q -O- http://www.gutenberg.org/dirs/etext96/cprfd10.txt | sed '1,419d' | tr "\n" " " | tr " " "\n" | perl -lpe 's/\W//g;$_=lc($_)' | grep "^[a-z]" | awk 'length > 1' | sort | uniq -c | awk '{print $2"\t"$1}' -
-4aptitude purge linux-image | grep ^i | grep -v $(uname -r)
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(follow with next command) tail -f from.log | colorize.pl +l20:".*" & Use with http://www.commandlinefu.com/commands/view/10031/intercept-monitor-and-manipulate-a-tcp-connection. - can use to view output of tees that send traffic to files - output will be interwoven with red for sent traffic and green for received. get colorize.pl from http://www.flinkmann.de/71-1-Colorizepl.html
-4tail -f to.log | colorize.pl +l10:".*" & -
Print "Art of hacking..." 100 times by perl or you can this tools : http://packetstormsecurity.org/shellcode/shellcodeencdec.py.txt Show Sample Output
-15perl -e 'print "\x41\x72\x74\x20\x6f\x66\x20\x68\x61\x63\x6b\x69\x6e\x67\x2e\x2e\x2e\n" x 100' - ‹ First < 6 7 8
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