{"id":1638,"date":"2014-04-26T17:13:12","date_gmt":"2014-04-26T17:13:12","guid":{"rendered":"http:\/\/iserversupport.com\/?p=1638"},"modified":"2024-12-31T18:46:27","modified_gmt":"2024-12-31T18:46:27","slug":"list-installed-perl-modules","status":"publish","type":"post","link":"https:\/\/iserversupport.com\/blog\/list-installed-perl-modules\/","title":{"rendered":"How to List Installed Perl Modules on Your Server"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#edeef2;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1300px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-0{width:100% !important;margin-top : 0px;margin-bottom : 0px;}.fusion-builder-column-0 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 1.92%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 1.92%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-0{width:100% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-0{width:100% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-1{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#edeef2;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1300px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_1 1_1 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-1\"><p>Perl is a powerful and versatile scripting language widely used for various applications, including web development, system administration, and data manipulation. As you work with Perl, it\u2019s essential to know which modules are installed on your server to ensure compatibility, troubleshoot issues, or manage dependencies for your projects. This guide will walk you through the steps to list installed Perl modules on your server.<\/p>\n<hr \/>\n<h3><strong>Why Check Installed Perl Modules?<\/strong><\/h3>\n<ol>\n<li><strong>Dependency Management<\/strong>:\n<ul>\n<li>Knowing the installed modules helps you identify missing dependencies for your scripts or applications.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Troubleshooting<\/strong>:\n<ul>\n<li>Helps pinpoint issues when a Perl script fails due to a missing or incompatible module.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Environment Consistency<\/strong>:\n<ul>\n<li>Ensures that your development, staging, and production environments have consistent module versions.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<hr \/>\n<h3><strong>Methods to List Installed Perl Modules<\/strong><\/h3>\n<p>Here are the most common ways to list installed Perl modules:<\/p>\n<h4><strong>1. Using the CPAN Shell<\/strong><\/h4>\n<p>The Comprehensive Perl Archive Network (CPAN) is a repository of Perl modules. You can use the CPAN shell to list installed modules.<\/p>\n<p><strong>Steps:<\/strong><\/p>\n<ol>\n<li>Open your terminal or SSH into your server.<\/li>\n<li>Run the following command:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">perl -MCPAN -e shell\r\n<\/code><\/pre>\n<\/div>\n<\/li>\n<li>In the CPAN shell, type:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">m\r\n<\/code><\/pre>\n<\/div>\n<p>This will display a list of all installed modules along with their versions.<\/li>\n<\/ol>\n<h4><strong>2. Using the <code>perldoc<\/code> Command<\/strong><\/h4>\n<p>You can use the <code>perldoc<\/code> command to generate a list of installed modules.<\/p>\n<p><strong>Steps:<\/strong><\/p>\n<ol>\n<li>Run this command in your terminal:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">perldoc perllocal\r\n<\/code><\/pre>\n<\/div>\n<\/li>\n<li>The output will include a list of installed modules, their versions, and installation details.<\/li>\n<\/ol>\n<h4><strong>3. Using the <code>instmodsh<\/code> Command<\/strong><\/h4>\n<p>Perl provides a built-in tool called <code>instmodsh<\/code> to interactively list installed modules.<\/p>\n<p><strong>Steps:<\/strong><\/p>\n<ol>\n<li>Run the command:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">instmodsh\r\n<\/code><\/pre>\n<\/div>\n<\/li>\n<li>In the interactive shell, type:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">l\r\n<\/code><\/pre>\n<\/div>\n<p>This will display all installed modules.<\/li>\n<\/ol>\n<h4><strong>4. Using a Script<\/strong><\/h4>\n<p>For a programmatic approach, you can write a simple Perl script to list installed modules.<\/p>\n<p><strong>Example Script:<\/strong><\/p>\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">perl<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-perl\"><span class=\"hljs-keyword\">use<\/span> ExtUtils::Installed;\r\n\r\n<span class=\"hljs-keyword\">my<\/span> $installed = ExtUtils::Installed-&gt;new();\r\n<span class=\"hljs-keyword\">my<\/span> @modules = $installed-&gt;modules();\r\n\r\n<span class=\"hljs-keyword\">print<\/span> <span class=\"hljs-string\">\"Installed Perl Modules:\\n\"<\/span>;\r\n<span class=\"hljs-keyword\">foreach<\/span> <span class=\"hljs-keyword\">my<\/span> $module (@modules) {\r\n    <span class=\"hljs-keyword\">print<\/span> <span class=\"hljs-string\">\"$module\\n\"<\/span>;\r\n}\r\n<\/code><\/pre>\n<\/div>\n<ul>\n<li>Save this script to a file, e.g., <code>list_modules.pl<\/code>.<\/li>\n<li>Run the script:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">perl list_modules.pl\r\n<\/code><\/pre>\n<\/div>\n<\/li>\n<\/ul>\n<h4><strong>5. Using Package Managers<\/strong><\/h4>\n<p>If Perl was installed through a package manager like <code>apt<\/code> or <code>yum<\/code>, you can use these tools to list installed modules. For example:<\/p>\n<ul>\n<li>On Debian\/Ubuntu:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">dpkg -l | grep perl\r\n<\/code><\/pre>\n<\/div>\n<\/li>\n<li>On Red Hat\/CentOS:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">yum list installed | grep perl\r\n<\/code><\/pre>\n<\/div>\n<\/li>\n<\/ul>\n<hr \/>\n<h3><strong>Tips for Managing Perl Modules<\/strong><\/h3>\n<ol>\n<li><strong>Update Modules Regularly<\/strong>:\n<ul>\n<li>Use CPAN to update modules:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">cpan upgrade\r\n<\/code><\/pre>\n<\/div>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>Check Module Documentation<\/strong>:\n<ul>\n<li>Use <code>perldoc<\/code> to view module documentation:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">perldoc Module::Name\r\n<\/code><\/pre>\n<\/div>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>Install Missing Modules<\/strong>:\n<ul>\n<li>Install missing modules with CPAN:\n<div class=\"contain-inline-size rounded-md border-&#091;0.5px&#093; border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none\">bash<\/div>\n<div class=\"sticky top-9 md:top-&#091;5.75rem&#093;\">\n<div class=\"absolute bottom-0 right-2 flex h-9 items-center\">\n<div class=\"flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary\"><\/div>\n<\/div>\n<\/div>\n<pre class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"!whitespace-pre hljs language-bash\">cpan install Module::Name\r\n<\/code><\/pre>\n<\/div>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>Use Local::Lib<\/strong>:\n<ul>\n<li>To avoid system-wide changes, use <code>local::lib<\/code> to manage modules in a user-specific directory.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<hr \/>\n<h3><strong>Conclusion<\/strong><\/h3>\n<p>Knowing how to list installed Perl modules is a vital skill for developers and administrators working with Perl. Whether you&#8217;re troubleshooting, managing dependencies, or ensuring consistency across environments, the methods outlined in this guide will help you efficiently manage your Perl modules.<\/p>\n<p>If you have further questions or need assistance with Perl module management, feel free to reach out to us at iServerSupport. We\u2019re here to simplify your server management needs!<\/p>\n<\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-1{width:100% !important;margin-top : 0px;margin-bottom : 0px;}.fusion-builder-column-1 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 1.92%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 1.92%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-1{width:100% !important;}.fusion-builder-column-1 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-1{width:100% !important;}.fusion-builder-column-1 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-2{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - 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