{"id":914,"date":"2024-12-24T10:08:02","date_gmt":"2024-12-24T10:08:02","guid":{"rendered":"https:\/\/coderepublics.com\/blog\/?p=914"},"modified":"2024-12-24T10:10:22","modified_gmt":"2024-12-24T10:10:22","slug":"how-to-configure-a-hostname-on-a-linux-system","status":"publish","type":"post","link":"https:\/\/coderepublics.com\/blog\/redhat\/how-to-configure-a-hostname-on-a-linux-system\/","title":{"rendered":"How to configure a Hostname on a Linux system"},"content":{"rendered":"<p>Learn how to easily change hostname in Linux, including Red Hat Enterprise Linux and Fedora. This step-by-step guide will help system administrators understand the importance of hostnames, how to configure them, and avoid common networking issues. Whether you&#8217;re managing local or remote systems, this guide will ensure you can efficiently update your system&#8217;s hostname.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/coderepublics.com\/blog\/redhat\/how-to-configure-a-hostname-on-a-linux-system\/#Understanding_and_Changing_Hostnames_in_Linux\" title=\"Understanding and Changing Hostnames in Linux\">Understanding and Changing Hostnames in Linux<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/coderepublics.com\/blog\/redhat\/how-to-configure-a-hostname-on-a-linux-system\/#Why_Hostnames_Matter\" title=\"Why Hostnames Matter\">Why Hostnames Matter<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/coderepublics.com\/blog\/redhat\/how-to-configure-a-hostname-on-a-linux-system\/#Step_1_View_Current_Hostname\" title=\"Step 1: View Current Hostname\">Step 1: View Current Hostname<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/coderepublics.com\/blog\/redhat\/how-to-configure-a-hostname-on-a-linux-system\/#Step_2_Change_the_Hostname\" title=\"Step 2: Change the Hostname\">Step 2: Change the Hostname<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/coderepublics.com\/blog\/redhat\/how-to-configure-a-hostname-on-a-linux-system\/#Step_3_Update_the_Loopback_Address\" title=\"Step 3: Update the Loopback Address\">Step 3: Update the Loopback Address<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/coderepublics.com\/blog\/redhat\/how-to-configure-a-hostname-on-a-linux-system\/#Step_4_Verify_the_Configuration\" title=\"Step 4: Verify the Configuration\">Step 4: Verify the Configuration<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Understanding_and_Changing_Hostnames_in_Linux\"><\/span>Understanding and Changing Hostnames in Linux<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Every computer has a unique identity, defined by its hostname and IP address. While IP addresses are essential for networking, it&#8217;s not practical to refer to systems by their IP addresses. Instead, we use hostnames, which are human-friendly names for machines. By mapping a hostname to an IP address, connecting to a system becomes much easier.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_Hostnames_Matter\"><\/span>Why Hostnames Matter<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Hostnames are crucial for system administrators. They allow us to identify and organize systems in a way that\u2019s easy to understand. This is especially important when managing systems remotely. For instance, I\u2019ve seen situations where companies change hostnames or IPs of storage servers, only to realize later that it caused issues with data replication.<\/p>\n<p>In this article, I\u2019ll focus on how to change hostname in Linux (Redhat) and Fedora.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_1_View_Current_Hostname\"><\/span>Step 1: View Current Hostname<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Open the terminal &gt; <span style=\"font-size: inherit;\">Run the following command:<\/span><strong><code class=\"!whitespace-pre hljs language-bash\" style=\"font-size: inherit;\">hostname<\/code><\/strong><\/p>\n<p>This will display the current hostname of your system. For example, it might show something like <code>localhost<\/code>. Alternatively, use the <code><strong>hostnamectl<\/strong><\/code> command for more detailed information: This will display the Current hostname, System architecture, Kernel version, Other system-related details<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_2_Change_the_Hostname\"><\/span><strong>Step 2: Change the Hostname<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Use the following command to change your hostname: <strong><code class=\"!whitespace-pre hljs language-bash\">sudo hostnamectl set-hostname <span class=\"hljs-string\">'Coderepublics'<\/span><\/code><\/strong><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-916 \" title=\"How to change hostname in Red hat Linux\" src=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/How-to-change-hostname-in-Redhat-Linux.png\" alt=\"How to change hostname in Red hat Linux\" width=\"707\" height=\"332\" srcset=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/How-to-change-hostname-in-Redhat-Linux.png 926w, https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/How-to-change-hostname-in-Redhat-Linux-300x141.png 300w, https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/How-to-change-hostname-in-Redhat-Linux-768x361.png 768w\" sizes=\"auto, (max-width: 707px) 100vw, 707px\" \/><\/p>\n<p>Replace <strong><code>Coderepublics<\/code><\/strong> with the hostname you want to set. Enter your <strong>root user credentials<\/strong> when prompted.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-915\" src=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Linux-Change-Hostname.png\" alt=\"Linux Change Hostname\" width=\"700\" height=\"375\" srcset=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Linux-Change-Hostname.png 1193w, https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Linux-Change-Hostname-300x161.png 300w, https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Linux-Change-Hostname-1024x549.png 1024w, https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Linux-Change-Hostname-768x412.png 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<p>Verify the change by running: <strong><span style=\"background-color: #f2f4f5; color: #222222;\">hostnamectl<\/span><\/strong><\/p>\n<p>If the new hostname doesn\u2019t reflect immediately, restart your machine to apply the changes. After that you&#8217;ll see on the below image that the hostname is changed from localhost to Coderepublics.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-917 size-full\" title=\"New Hostname in Linux\" src=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/New-Hostname-in-Linux.png\" alt=\"New Hostname in Linux\" width=\"717\" height=\"322\" srcset=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/New-Hostname-in-Linux.png 717w, https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/New-Hostname-in-Linux-300x135.png 300w\" sizes=\"auto, (max-width: 717px) 100vw, 717px\" \/><\/p>\n<p><strong>Also Read: <a href=\"https:\/\/coderepublics.com\/blog\/redhat\/how-to-install-red-hat-enterprise-linux\/\" target=\"_blank\" rel=\"noopener\">How to install Red Hat Enterprise Linux<\/a><\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_3_Update_the_Loopback_Address\"><\/span><strong>Step 3: Update the Loopback Address<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Open the <strong><code>\/etc\/hosts<\/code><\/strong> file using a text editor (e.g., <code>nano<\/code>): Run command <strong><code class=\"!whitespace-pre hljs language-bash\">sudo nano \/etc\/hosts<\/code><\/strong><\/p>\n<div class=\"contain-inline-size rounded-md border-[0.5px] border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950\">\n<div class=\"overflow-y-auto p-4\" dir=\"ltr\">\n<ul>\n<li>Add your root credentials when prompted and <span style=\"font-size: inherit;\">Update the file by adding the loopback address and the new hostname: <\/span>plaintext\u00a0 <strong><code class=\"!whitespace-pre hljs language-plaintext\">127.0.1.1   Coderepublics<\/code><\/strong>. Replace <strong><code>Coderepublics<\/code> <\/strong>with your chosen hostname.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-918 \" title=\"Access Loopback IP Address in Linux\" src=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Access-Loopback-IP-Address-in-Linux.png\" alt=\"Access Loopback IP Address in Linux\" width=\"737\" height=\"412\" srcset=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Access-Loopback-IP-Address-in-Linux.png 816w, https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Access-Loopback-IP-Address-in-Linux-300x168.png 300w, https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Access-Loopback-IP-Address-in-Linux-768x429.png 768w\" sizes=\"auto, (max-width: 737px) 100vw, 737px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_4_Verify_the_Configuration\"><\/span><strong>Step 4: Verify the Configuration<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Use the <strong><code>ping<\/code><\/strong> command to test your hostname: <span style=\"background-color: #f2f4f5; color: #222222;\"><strong>ping Coderepublics<\/strong>. <\/span>If configured correctly, the system will resolve your hostname to the loopback IP address.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-919\" src=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Ping-your-new-hostname-in-linux.png\" alt=\"Ping your new hostname in Linux\" width=\"716\" height=\"410\" srcset=\"https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Ping-your-new-hostname-in-linux.png 707w, https:\/\/coderepublics.com\/blog\/wp-content\/uploads\/2024\/12\/Ping-your-new-hostname-in-linux-300x172.png 300w\" sizes=\"auto, (max-width: 716px) 100vw, 716px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to easily change hostname in Linux, including Red Hat Enterprise Linux and Fedora. This step-by-step guide will help system administrators understand the importance of hostnames, how to configure them, and avoid common networking issues. Whether you&#8217;re managing local or remote systems, this guide will ensure you can efficiently update your system&#8217;s hostname. Understanding &#8230; <a title=\"How to configure a Hostname on a Linux system\" class=\"read-more\" href=\"https:\/\/coderepublics.com\/blog\/redhat\/how-to-configure-a-hostname-on-a-linux-system\/\" aria-label=\"More on How to configure a Hostname on a Linux system\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":921,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,81,72],"tags":[80],"class_list":["post-914","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-linux","category-redhat","tag-change-hostname-in-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to configure a Hostname on a Linux system - CodeRepublics<\/title>\n<meta name=\"description\" content=\"Learn how to change the hostname in Linux with a guide for system administrators. 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