{"id":2131,"date":"2024-03-20T10:30:43","date_gmt":"2024-03-20T09:30:43","guid":{"rendered":"https:\/\/hoganhost.com.ng\/blog\/?p=2131"},"modified":"2024-08-12T13:20:15","modified_gmt":"2024-08-12T12:20:15","slug":"how-to-fix-the-unable-to-resolve-host-error-on-linux","status":"publish","type":"post","link":"https:\/\/hoganhost.com.ng\/blog\/server\/ubuntu\/how-to-fix-the-unable-to-resolve-host-error-on-linux\/","title":{"rendered":"How to Fix the \u201cunable to resolve host\u201d Error on Linux"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\" wp-image-2132 aligncenter\" src=\"https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/D46A26FE-1246-4010-9213-534FA28200A3-300x153.jpeg\" alt=\"\" width=\"394\" height=\"201\" srcset=\"https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/D46A26FE-1246-4010-9213-534FA28200A3-300x153.jpeg 300w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/D46A26FE-1246-4010-9213-534FA28200A3-1024x521.jpeg 1024w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/D46A26FE-1246-4010-9213-534FA28200A3-768x391.jpeg 768w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/D46A26FE-1246-4010-9213-534FA28200A3-1536x782.jpeg 1536w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/D46A26FE-1246-4010-9213-534FA28200A3-2048x1043.jpeg 2048w\" sizes=\"(max-width: 394px) 100vw, 394px\" \/><\/p>\n<p>After changing the hostname on your Linux system, you may encounter the error &#8220;unable to resolve host&#8221;. Here&#8217;s what that means, and what you can do to fix it.<\/p>\n<h2 id=\"what-is-a-hostname-and-how-do-you-change-it\">What Is a Hostname, and How Do You Change It?<\/h2>\n<p>When you set up your Linux system\u2014whether it&#8217;s a VPS or a physical machine in your home\u2014you may be asked to provide a hostname. This is a label your computer uses to identify itself to other machines on the network, to the user, and to itself.<\/p>\n<p>Hostnames should be descriptive so that it&#8217;s easy to identify machines\u2014even when you&#8217;re not sitting directly in front of them. &#8220;Kitchen PC&#8221;, or &#8220;David&#8217;s tiny laptop&#8221; are great names. &#8220;racknerd-b7516a&#8221; is a terrible name and makes it difficult to work out exactly which machine you&#8217;re connected to.<\/p>\n<p>Open a terminal by either pressing\u00a0<strong>Ctrl + Alt + T<\/strong>, or by selecting it from your menu system, then enter:<\/p>\n<pre><code class=\"hljs sql\">sudo hostnamectl <span class=\"hljs-keyword\">set<\/span>-hostname your-<span class=\"hljs-keyword\">new<\/span>-hostname<\/code><\/pre>\n<p><img decoding=\"async\" class=\" wp-image-2133 aligncenter\" src=\"https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/A04D5968-A9FA-4A17-BE2D-96C39EF5EF36-300x141.jpeg\" alt=\"\" width=\"692\" height=\"325\" srcset=\"https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/A04D5968-A9FA-4A17-BE2D-96C39EF5EF36-300x141.jpeg 300w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/A04D5968-A9FA-4A17-BE2D-96C39EF5EF36-1024x482.jpeg 1024w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/A04D5968-A9FA-4A17-BE2D-96C39EF5EF36-768x361.jpeg 768w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/A04D5968-A9FA-4A17-BE2D-96C39EF5EF36-1536x722.jpeg 1536w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/A04D5968-A9FA-4A17-BE2D-96C39EF5EF36.jpeg 2016w\" sizes=\"(max-width: 692px) 100vw, 692px\" \/><\/p>\n<p>Log out and then log back in, and you will see that the hostname has changed.<\/p>\n<div class=\"ad-odd\"><\/div>\n<h2 id=\"what-does-quot-unable-to-resolve-host-name-or-service-not-known-quot-mean\">What Does &#8220;unable to resolve host: Name or service not known&#8221; Mean?<\/h2>\n<p>After changing your system&#8217;s hostname, the next time you try to run a command as\u00a0<strong>sudo<\/strong>, you might receive a hostname error. In our case, the error was &#8220;unable to resolve host MUOVPS: Name or service not known&#8221;.<\/p>\n<p>This error does not prevent you from carrying out any tasks, but it can be annoying.<\/p>\n<pre><code class=\"hljs \">cat \/etc\/hostname<\/code><\/pre>\n<p>The aforementioned command will show the hostname you just set, but your new hostname is not present as an output of:<\/p>\n<pre><code class=\"hljs \">cat \/etc\/hosts<\/code><\/pre>\n<p><img decoding=\"async\" class=\" wp-image-2134 aligncenter\" src=\"https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/B996FFC5-239D-41BA-859A-C66DFA8D36B1-300x131.jpeg\" alt=\"\" width=\"804\" height=\"351\" srcset=\"https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/B996FFC5-239D-41BA-859A-C66DFA8D36B1-300x131.jpeg 300w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/B996FFC5-239D-41BA-859A-C66DFA8D36B1-768x336.jpeg 768w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/B996FFC5-239D-41BA-859A-C66DFA8D36B1-1536x673.jpeg 1536w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/B996FFC5-239D-41BA-859A-C66DFA8D36B1-2048x897.jpeg 2048w\" sizes=\"(max-width: 804px) 100vw, 804px\" \/><\/p>\n<p>To fix this error, use\u00a0<strong>nano<\/strong>\u00a0to edit the file:<\/p>\n<pre><code class=\"hljs \">sudo nano \/etc\/hosts<\/code><\/pre>\n<p>On a new line, add the hostname of your machine\u2014the hostname of our VPS is MUOVPS as shown below\u2014then save and exit nano with\u00a0<strong>Ctrl + O<\/strong>\u00a0then\u00a0<strong>Ctrl + X<\/strong>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2135 aligncenter\" src=\"https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/F53D4E35-81B9-46F7-9265-1BFF6F24C338-300x148.jpeg\" alt=\"\" width=\"624\" height=\"308\" srcset=\"https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/F53D4E35-81B9-46F7-9265-1BFF6F24C338-300x148.jpeg 300w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/F53D4E35-81B9-46F7-9265-1BFF6F24C338-1024x504.jpeg 1024w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/F53D4E35-81B9-46F7-9265-1BFF6F24C338-768x378.jpeg 768w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/F53D4E35-81B9-46F7-9265-1BFF6F24C338-1536x756.jpeg 1536w, https:\/\/hoganhost.com.ng\/blog\/wp-content\/uploads\/2024\/03\/F53D4E35-81B9-46F7-9265-1BFF6F24C338-2048x1008.jpeg 2048w\" sizes=\"(max-width: 624px) 100vw, 624px\" \/><\/p>\n<h2 id=\"you-have-fixed-the-ldquo-unable-to-resolve-host-rdquo-error\">You Have Fixed the \u201cunable to resolve host\u201d Error!<\/h2>\n<p>Hostname errors are not the most serious and are unlikely to significantly disrupt your workflow or your day. But they are annoying and show that you haven&#8217;t configured your system properly. For this reason, it&#8217;s worth setting the hostname properly.<\/p>\n<p>Fixing this issue requires you to edit the\u00a0<strong>\/etc\/hosts<\/strong>\u00a0file. Since it is a critical system file, knowing how to edit it properly is important to prevent any errors.<\/p>\n<p>Check out our cheap and reliable web hosting <a href=\"https:\/\/hoganhost.com.ng\">hoganhost.com.ng<\/a><\/p>\n<div class=\"body-img landscape \">\n<div class=\"responsive-img  image-expandable  img-article-item\" data-img-url=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/cat-hostname.jpg\" data-modal-id=\"single-image-modal\" data-modal-container-id=\"single-image-modal-container\" data-img-caption=\"null\">\n<figure><picture><source srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/cat-hostname.jpg?q=50&amp;fit=crop&amp;w=1500&amp;dpr=1.5\" media=\"(min-width: 1024px)\" data-srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/cat-hostname.jpg?q=50&amp;fit=crop&amp;w=1500&amp;dpr=1.5\" \/><source srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/cat-hostname.jpg?q=50&amp;fit=crop&amp;w=943&amp;dpr=1.5\" media=\"(min-width: 768px)\" data-srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/cat-hostname.jpg?q=50&amp;fit=crop&amp;w=943&amp;dpr=1.5\" \/><source srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/cat-hostname.jpg?q=50&amp;fit=crop&amp;w=767&amp;dpr=1.5\" media=\"(min-width: 481px)\" data-srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/cat-hostname.jpg?q=50&amp;fit=crop&amp;w=767&amp;dpr=1.5\" \/><source srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/cat-hostname.jpg?q=50&amp;fit=crop&amp;w=480&amp;dpr=1.5\" media=\"(min-width: 0px)\" data-srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/cat-hostname.jpg?q=50&amp;fit=crop&amp;w=480&amp;dpr=1.5\" \/><\/picture><\/figure>\n<\/div>\n<\/div>\n<div class=\"body-img landscape \">\n<div class=\"responsive-img  image-expandable  img-article-item\" data-img-url=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/change-hostname.jpg\" data-modal-id=\"single-image-modal\" data-modal-container-id=\"single-image-modal-container\" data-img-caption=\"null\">\n<figure><picture><source srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/change-hostname.jpg?q=50&amp;fit=crop&amp;w=1500&amp;dpr=1.5\" media=\"(min-width: 1024px)\" data-srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/change-hostname.jpg?q=50&amp;fit=crop&amp;w=1500&amp;dpr=1.5\" \/><source srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/change-hostname.jpg?q=50&amp;fit=crop&amp;w=943&amp;dpr=1.5\" media=\"(min-width: 768px)\" data-srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/change-hostname.jpg?q=50&amp;fit=crop&amp;w=943&amp;dpr=1.5\" \/><source srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/change-hostname.jpg?q=50&amp;fit=crop&amp;w=767&amp;dpr=1.5\" media=\"(min-width: 481px)\" data-srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/change-hostname.jpg?q=50&amp;fit=crop&amp;w=767&amp;dpr=1.5\" \/><source srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/change-hostname.jpg?q=50&amp;fit=crop&amp;w=480&amp;dpr=1.5\" media=\"(min-width: 0px)\" data-srcset=\"https:\/\/static1.makeuseofimages.com\/wordpress\/wp-content\/uploads\/2022\/09\/change-hostname.jpg?q=50&amp;fit=crop&amp;w=480&amp;dpr=1.5\" \/><\/picture><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>After changing the hostname on your Linux system, you may encounter the error &#8220;unable to resolve host&#8221;. Here&#8217;s what that [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2132,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[59],"tags":[],"class_list":["post-2131","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ubuntu"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Fix the \u201cunable to resolve host\u201d Error on Linux - HoganHost blog<\/title>\n<meta name=\"description\" content=\"After changing the hostname on your Linux system, you may encounter the error &quot;unable to resolve host&quot;. 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