CPAN的配置

1)配置文件：  /usr/lib/perl5/5.8.8/CPAN/Config.pm
如果第一次运行cpan命令
cpan提示进行交互的进行配置
当然我们根据自己的需要也可以手动的编辑此文件
贴一下自己的配置：
# This is CPAN.pm's systemwide configuration file. This file provides
# defaults for users, and the values can be 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[/root/.cpan/build],
  'cache_metadata' => q[1],
  'cpan_home' => q[/root/.cpan],
  'dontload_hash' => {  },
  'ftp' => q[/usr/kerberos/bin/ftp],
  'ftp_proxy' => q[],
  'getcwd' => q[cwd],
  'gpg' => q[/usr/bin/gpg],
  'gzip' => q[/usr/bin/gzip],
  'histfile' => q[/root/.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[/root/.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[

]],
  'wget' => q[/usr/bin/wget],
};
1;
__END__
2)如果需要重新配置CPAN,输入：
#cpan
进入cpan后，输入：
#CPAN>o conf init
重新配置后Config.pm如下：
$CPAN::Config = {
  'applypatch' => q[],
  'auto_commit' => q[0],
  'build_cache' => q[10],
  'build_dir' => q[/root/.cpan/build],
  'build_dir_reuse' => q[1],
  'build_requires_install_policy' => q[ask/yes],
  'bzip2' => q[/usr/bin/bzip2],
  'cache_metadata' => q[1],
  'check_sigs' => q[0],
  'colorize_output' => q[0],
  'commandnumber_in_prompt' => q[1],
  'cpan_home' => q[/root/.cpan],
  'curl' => q[/usr/bin/curl],
  'dontload_hash' => {  },
  'ftp' => q[/usr/kerberos/bin/ftp],
  'ftp_passive' => q[1],
  'ftp_proxy' => q[],
  'getcwd' => q[cwd],
  'gpg' => q[/usr/bin/gpg],
  'gzip' => q[/usr/bin/gzip],
  'histfile' => q[/root/.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[/root/.cpan/sources],
  'load_module_verbosity' => q[v],
  'lynx' => q[],
  'make' => q[/usr/bin/make],
  'make_arg' => q[],
  'make_install_arg' => q[],
  'make_install_make_command' => q[/usr/bin/make],
  'makepl_arg' => q[],
  'mbuild_arg' => q[],
  'mbuild_install_arg' => q[],
  'mbuild_install_build_command' => q[./Build],
  'mbuildpl_arg' => q[],
  'ncftp' => q[],
  'ncftpget' => q[],
  'no_proxy' => q[],
  'pager' => q[/usr/bin/less],
  'patch' => q[/usr/bin/patch],
  'prefer_installer' => q[MB],
  'prefs_dir' => q[/root/.cpan/prefs],
  'prerequisites_policy' => q[ask],
  'scan_cache' => q[atstart],
  'shell' => q[/bin/bash],
  'show_unparsable_versions' => q[0],
  'show_upload_date' => q[0],
  'show_zero_versions' => q[0],
  'tar' => q[/bin/tar],
  'tar_verbosity' => q[v],
  'term_is_latin' => q[1],
  'term_ornaments' => q[1],
  'test_report' => q[0],
  'unzip' => q[/usr/bin/unzip],
  'urllist' => [q[

]],
  'use_sqlite' => q[0],
  'wget' => q[/usr/bin/wget],
  'yaml_load_code' => q[0],
  'yaml_module' => q[YAML],
};
1;
__END__
3)安装perl组件出错：
/usr/bin/make — NOT OK
Running make test
Can’t test without successful make
Running make install
make had returned bad status, install seems impossible
一.可以尝试
#cpan
cpan>o conf make /usr/bin/make
cpan>o conf commit
cpan>exit
然后用perl命令再安装一下该组件，看能否成功。
二.原因也可能是默认缓存/root/.cpan中的数据损坏
rm -rf ~/.cpan
删除后在perl -MCPAN -e shell中执行reload index
然后执行install Bundle::CPAN
最后执行reload CPAN即可正常通过命令行install MODULES