how to learn perl

[Root @ test download] #./check_memory.pl Can't locate Nagios/Plugin. pm in @ INC (@ INC contains: /usr/local/lib64/perl5/usr/local/share/perl5/usr/lib64/perl5/vendor_perl/usr/share/perl5/vendor_perl/usr/lib64/perl5/usr /share/perl5 .) at. /check_memory.pl line 26. BEGIN failed -- compilation aborted at./check_memory.pl line 26. Solution: [Root @ test download] # perl-MCPAN-e 'Install Nagios: plugin' [Root @ test download] #./check_memory.pl CHECK_MEM

This article mainly introduces the differences between the PHP extension modules Pecl, Pear, and Perl. For more information, see I. brief summary:Pear: a relatively standard for writing, a popular toolbox code set in foreign countries Pecl: php extension package, but not included in the basic extension scope of php Perl: a scripting language that appeared earlier than php. php draws on its regular expressio

Summary:1. Using built-in warning information2. Using the Perl Help documentDetails:1. Built-in warning information-Perl can warn you when there are "suspicious things" running in your program-The warning does not change the behavior of the program, just as an auxiliary hint to the programmer. The programmer is prompted when Perl's interpreter considers the code to be problematic, but does not prevent the p

Read standard input:foreach (The diamond operator The @argv array is checked first, and if it is empty, it is entered from the standard input stream. The value of the @ARGV can be from the command line, or you can assign a value yourself.The value of the./program Fred Barney Betty # @ARGV is three files after the command line.while (Standard output in Perl: Print. When you output multiple items, you can separate them by adding "," and enclose them in

due to a running error =; pay attention to this when calling by reference; In addition, you can use aliases to pass array parameters. When you call an array in the form of my_sub (@ array, perl copies all elements in the array @ array to the @ _ array of the subprogram. When the array @ array is large, this call method consumes resources and time, low efficiency; usableAlias TransferArray to avoid this copy operation, in order to directly operate

This article mainly introduces the true and false in-depth study in Perl, this article explains in detail the difference between the truth value and the false values in Perl, the need of friends can refer to the Perl considers truth values to be self-evident (self-evident), which means that the truth of any thing can be computed.

Tags: Zabbix mysql perl1.Yum Install Perl-libwww-perlYum Install Perl-file-whichYum Install Perl-dbd-mysqlYum Install PERL-DIGEST-SHA1Yum Install Perl-time-hiresYum Install Perl-crypt-ssleay2. Testing#!/usr/bin/

It is often seen that Ruby is compared with Python, and some say that Ruby is more like a combination of Perl and Python, so is ruby more like Python or Perl? Reply content:See what Matz is saying: / http blade.nagaokaut.ac.jp/c gi-bin/scat.rb/ruby/ruby-talk/179642 Ruby is a language designed in the following steps: * Take a simple Lisp language (like one prior to CL). * Remove macros, s-ex

Deserialization of PERL 5.80x00 simple article Translation During the penetration test, I found that an application contains a form with a base64 encoded hidden attribute parameter named "state ", contains some strings and binary data. #!bash$ echo 'BAcIMTIzNDU2NzgECAgIAwMAAAAEAwAAAAAGAAAAcGFyYW1zCIIEAAAAc3RlcAQDAQAAAAiAHgAAAF9fZ2V0X3dvcmtmbG93X2J1c2luZXNzX3BhcmFtcwQAAABkYXRh' | base64 -d | hd 00000000 04 07 08 31 32 33 34 35 36 37 38 04 08 08 08

different variables, $main:: X and $DBI:: X is also a different variable.Allows you to specify the package part of the variable name, and if you do, Perl will know exactly which variable you are referring to. For brevity, however, a variable's package qualifier is not typically specified.1. Current PackageIf you only say $x,perl assume that you are referring to the variable $x in the current package. What

ProcessInstall Interpreter/compiler-test source code feasibility-create icon-compile program-shelling Required toolsPerl interpreter: ActivePerlPDK Development Kit: ActiveState Perl Dev KitIcon Editor: http://demonalex.3322.org/download/development/pic2icon.rarBeidou shelling tool: http://demonalex.3322.org/download/development/Nspack3.7.rar Tool used for testingPeid shell viewing tool: http://demonalex.3322.org/download/development/peid.rar Install

and add the following lines: ScriptAlias/PHP/"C:/Apache/PHP /" Addtype application/X-httpd-PHP. php Action application/X-httpd-PHP "/PHP/php.exe" 5. Restart Apache (net stop Apache, Net start Apache) PhP4 can be run. Create a file c: \ apache \ htdocs \ info. php, There is only one line of content: In the browser address bar, enter: PhP4 has built-in support for MySQL and does not require additional settings 【★★★Zend optimizer for PhP4 quick installation★★★] 1. Extract the ZendOptim

Author: mellonfire2006-05-12 10:10:26 You may already know that there are many existing Perl modules on the Perl integrated collection network (Comprehensive Perl archive network, CPAN), allowing developers to efficiently complete common tasks. In particular, CPAN provides resources for ne

One of the coolest modules in Perl is the Perl database interface (DBI ). By providing a series of internal functions that can be converted into original call functions, the DBI module provides a unified interface for many different databases. With Perl, you can easily use databases and create dynamic web pages.Currently, MySQL is a database widely used for Web w

1.Perl Array (1): 1 Initialize the array @array = ("Stringa", "StringB", "STRINGC");(2) using negative index loop to retrieve print $array [-1]; #输出索引为 (-1 + 3)% 3 = 2 STRINGC3 Dynamic growth $array [4] = "STRINGD"; #虽然 $array [3] has not yet been used, but in the use of dynamically assigned $array[4], has been left vacant for $array[3]4 dynamic growth after the negative index print $array [-1]; #输出索引为 (-1 + 5)% 5 = 4 Stringd5 print @array; #输出数组中所有值

This chapter describes how to use the Perl DBI with the MySQL interface. We do not discuss the rationale or architecture of DBI. For information on these aspects of DBI (especially the comparison with the C and PHP APIs), see Chapter 5th. Examples of this chapter use the sample database samp_db, using the credits save scheme and the tables required by the History League. To get the most out of this chapter, it's a good idea to know something about

Author: A Hui http: farmerluo. googlecode. how to install comfilescheck_redis.pl: When the script uses the perl Redis database, you must first install this: # perl-MCPAN-eshell # installRediswgethttp: farmerluo. googlecode. comfilescheck_redis.plcpcheck_redis.p Author: A HuiHttp: // faRmErluo.googlecode.com/FileS/check_rEdIs. plThis section describes how to install:The script uses the

Configure cdperl-5.8.8./Configure-demakemaketestmakeinstall Several Notes: 1-de is the configuration parameter, meaning the default configuration; 2 here there is a step If you want to use perlto analyze the timeline and exceldata in ora 8.0, download perl-5.8.tar.bz2 from chinaunix, Tar jxvf perl-5.8.8.tar.bz2Cd perl-5.8.8./Configure-deMakeMake testMake instal

perl directory. Installation: 1. Run the "cmd" command, enter the MS-DOS, and check whether Perl is properly installed under the EG folder of the Perl installation directory: Cd c: \ Perl \ Eg Run Perl example. pl in this directory. If "hellofrom ActivePerl!" is displayed