Perl module installation and update source step detailed

Description
When you configure some services, you need to install the Perl module. There are two ways to install the Perl module: Manual Installation and automatic installation.
The perl–mcpan–e ' Install XXX ' automatically installs the Perl module, the module is not down, most likely the Perl source is not set up, then need to update the Perl source.

Realize:
A. Perl module installation
1.perl Module Manual Installation
On CPAN, such as search.cpan.org to search for the modules you want to install:
Download TAR-ZXVF XXX Uncompressed
First look at the Readme Ah, to develop good habits, Perl has a lot of related modules, you may want to let you first install this one, do not finally find out how did not install? It's 2.
There's no problem with that: Perl makefile.pl
Continue no problem: make
No problem: Make install
Shipping installation is more troublesome. To search the relevant web site for the required modules, and then download the source package to install (Installation process: Perl makefile.pl;make;make install). However, this method is more cumbersome, each module to search, download, decompression, compilation, installation. Through the # perl-mcpan-e "Install xxx::xxx" automatic installation faster.

2.perl Module Automatic Installation

The code is as follows
# PERL-MCPAN-E Shell//Enter CPAN interface cpan> Install XXX

XXX for the Perl module to be installed, of course, can also directly # perl–mcpan–e ' Install xxx ' after a heap of settings for CPAN, if the Perl source is not good, it will appear in the download slow or can not download at all. You can then modify the Perl source.

Two. To update the Perl source, Perl Source modification has 3 ways:
1. Directly delete the CPAN configuration file and related software

The code is as follows
# Cd/etc/perl/cpan # RM CONFIG.PM # Cd/root/.cpan//This directory was created at the beginning of initialization of CPAN with root account # RM-RF * # PERL-MCPAN-E Shell//Then reconfigure CPAN, which is equivalent to the first use of CPAN automatic installation features

2. Reconfigure, if you want to reconfigure CPAN, you can enter the CPAN first

The code is as follows
# PERL-MCPAN-E Shell cpan> o conf init//input at the CPAN command line, and then modify each option in the following query Cpan> Reload Index///after modification through reload index, reload CPAN to update Cpan> Reload CPAN

3. Change config.pm, anyway set up in here, lazy people will change this is OK

The code is as follows

# Find/-name comfig.pm//or Whereis comfig.pm, note case # VI/USR/LIB/PERL5/5.8.8/CPAN/CONFIG.PM//Post configuration, according to experience this configuration is a problem with the meter (the problem is also the RP problem) # This is cpan.pm ' s systemwide configuration file. This file provides # Defaults for users, and the values can is changed in a per-user # configuration file. The User-config file is being looked for as # ~/.cpan/cpan/myconfig.pm. $CPAN:: Config = { ' Build_cache ' => q[10], ' Build_dir ' => q[/home/chenbiyan/.cpan/build], ' Cache_metadata ' => q[1], ' Cpan_home ' => Q[/home/chenbiyan/.cpan], ' Dontload_hash ' => {}, ' FTP ' => q[/usr/kerberos/bin/ftp], ' Ftp_proxy ' => q[], #有用代理的记得设置下 ' GETCWD ' => Q[CWD], ' GPG ' => q[/usr/bin/gpg], ' gzip ' => Q[/bin/gzip], ' Histfile ' => q[/home/chenbiyan/.cpan/histfile], ' Histsize ' => q[100], ' Http_proxy ' => q[], ' Inactivity_timeout ' => q[0], ' Index_expire ' => q[1], ' Inhibit_startup_message ' => q[0], ' Keep_source_where ' => q[/home/chenbiyan/.cpan/sources], ' Links ' => q[/usr/bin/links], ' Make ' => q[/usr/bin/make], ' Make_arg ' => q[], ' Make_install_arg ' => q[], ' Makepl_arg ' => q[], ' NcFTP ' => q[], ' Ncftpget ' => q[], ' No_proxy ' => q[], ' Pager ' => q[/usr/bin/less], ' Prerequisites_policy ' => q[ask], ' Scan_cache ' => Q[atstart], ' Shell ' => Q[/bin/bash], ' Tar ' => Q[/bin/tar], ' Term_is_latin ' => q[1], ' Unzip ' => Q[/usr/bin/unzip], ' Urllist ' => [q[ftp://mirrors.ustc.edu.cn/cpan/]], #这块是重点, it's usually urlist not to be chosen. ' wget ' => q[/usr/bin/wget], }; 1; __end__

Appendix:
Appendix 1. Common mistakes, this has not been tried, first put the!!!

The code is as follows
Make: * * No rule to make target ' yes '. Stop. /usr/bin/make Yes-not OK Running make Test Can ' t test without successful make Running make Install Make had returned bad status, install seems impossible

There is a newspaper urlist did not choose, let Retry retry, then you need to first install the associated module, and then install it, or you retry countless times will not install.