{"id":35793,"date":"2020-02-03T02:42:04","date_gmt":"2020-02-03T10:42:04","guid":{"rendered":"https:\/\/kinsta.com\/?post_type=knowledgebase&#038;p=65219"},"modified":"2025-10-01T20:05:44","modified_gmt":"2025-10-01T19:05:44","slug":"flush-dns","status":"publish","type":"post","link":"https:\/\/kinsta.com\/dk\/blog\/flush-dns\/","title":{"rendered":"S\u00e5dan flushes DNS-cache (Windows, Mac, Chrome)"},"content":{"rendered":"<p>Fejlfinding p\u00e5 dit websted kan v\u00e6re et skr\u00e6mmende ansvar. N\u00e5r det kommer til opgaver som at flushe din Domain Name Server (DNS) cache, er det let at blive overv\u00e6ldet og forvirret, inden du endda er startet.<\/p>\n<p>Heldigvis kan du udf\u00f8re denne s\u00e6rlige pligt hurtigt og nemt, selv med lidt eller ingen teknisk erfaring. To korte trin vil g\u00f8re din DNS-cache klar, og du kan forts\u00e6tte med at l\u00f8se det problem, du tilf\u00e6ldigvis st\u00e5r overfor.<\/p>\n<p>I dette indl\u00e6g forklarer vi, hvad en DNS-cache er, og i hvilke situationer du muligvis har brug for for at flushe din. Vi deler derefter et \u00e6gte eksempel fra vores direkte erfaring og forklarer, hvordan vi udf\u00f8rer dette fejlfindingstrin, uanset hvilken hardware du bruger.<\/p>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc>\n<h3>Foretr\u00e6kker du at se <a href=\"https:\/\/www.youtube.com\/watch?v=VJsjCkq9CjI&#038;\">videoversionen<\/a>?<\/h3>\n<p class=\"p1\"><kinsta-video src=\"https:\/\/www.youtube.com\/watch?v=VJsjCkq9CjI&amp;\"><\/kinsta-video><\/p>\n<h2>En introduktion til DNS-caching<\/h2>\n<p>For at forst\u00e5, hvorfor du muligvis har brug for at flushe din DNS-cache, er der flere komponenter, vi har brug for at nedbryde.<\/p>\n<p>For det f\u00f8rste er <a href=\"https:\/\/kinsta.com\/dk\/blog\/hvad-er-dns\/\">Domain Name System (DNS)<\/a> et indeks over alle websteder p\u00e5 internettet og deres IP-adresser. Du kan t\u00e6nke p\u00e5 det som et bibliotek eller en telefonbog til websteder. <a href=\"https:\/\/kinsta.com\/dk\/blog\/wordpress-cache\/\">Hvad ang\u00e5r &#8216;caching<\/a>&#8216;, er det processen med at gemme et \u00f8jebliksbillede af noget (f.eks. en webside), s\u00e5 det kan indl\u00e6ses hurtigere i fremtiden.<\/p>\n<p>S\u00e5 DNS-cache involverer dit operativsystem (OS) eller browser, der fanger nyligt bes\u00f8gt IP-adresse og gemmer dem i en database. Dette g\u00f8r det muligt for din browser at genindl\u00e6se websteder, du tidligere har bes\u00f8gt, selv hvis den skulle henvise til DNS igen hver gang.<\/p>\n<p>Desv\u00e6rre kan din <a href=\"https:\/\/kinsta.com\/dk\/blog\/dns-server-svarer-ikke\/\">DNS-caching blive beskadiget<\/a>, hvilket f\u00f8rer dig ind i phishing-ordninger. Det kan ogs\u00e5 simpelthen blive for\u00e6ldet eller oprette problemer med internetforbindelse. I en af \u200b\u200bdisse situationer kan det at hj\u00e6lpe med at rydde din DNS-cache, ofte hj\u00e6lpe dig med at l\u00f8se problemet og komme tilbage online.<\/p>\n<h3>En DNS-cache-casestudie<\/h3>\n<p>For at illustrere punktet yderligere, lad os se p\u00e5 et eksempel, der faktisk er sket med en Kinsta-klients websted.<\/p>\n<p>Klienten kontaktede os, fordi deres billeder, CSS og JavaScript ikke blev indl\u00e6st korrekt p\u00e5 deres websted.<\/p>\n<p>Webstedet s\u00e5 ud til at indl\u00e6se helt fint for os, og klienten havde ikke foretaget nogen nylige \u00e6ndringer. Efter inspektion af deres websted med <a href=\"https:\/\/developers.google.com\/web\/tools\/chrome-devtools\">Chrome Devtools<\/a> kunne vi se, at alt, der kom fra <a href=\"https:\/\/kinsta.com\/dk\/blog\/wordpress-cdn\/\">deres CDN<\/a>-underdom\u00e6ne (<em>cdn.domain.com<\/em>) ikke indl\u00e6ses korrekt, og i stedet rapporterede <a href=\"https:\/\/kinsta.com\/dk\/blog\/error-404-not-found\/\">404 errors<\/a>.<\/p>\n<p>Den f\u00f8rste ting, vi gjorde, var at pinge CDN-underdom\u00e6net for at se, om vi kunne f\u00e5 adgang til det. Det gav et svar, som forventet. Vi k\u00f8rte derefter klientens CDN URL gennem det gratis <a href=\"https:\/\/www.whatsmydns.net\/\">whatsmydns tool<\/a>.<\/p>\n<p>Dette v\u00e6rkt\u00f8j giver brugerne mulighed for hurtigt at kontrollere opl\u00f8sningen p\u00e5 DNS-poster (f.eks. CDN CNAME) fra flere geografiske placeringer. Vi \u00f8nskede at sikre, at webstedet blev indl\u00e6st fint overalt, udover kun vores fysiske placering, og at det var ved at g\u00e5 tilbage til kundens CDN-udbyder.<\/p>\n<p>Resultaterne viste, at det var:<\/p>\n<figure style=\"width: 900px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/dk\/wp-content\/uploads\/sites\/12\/2020\/01\/eksempel-whatsmydns-cname-oplosning.png\" alt=\"Eksempel p\u00e5 whatsmydns CNAME-opl\u00f8sning\" width=\"900\" height=\"473\"><figcaption class=\"wp-caption-text\">Eksempel p\u00e5 whatsmydns CNAME-opl\u00f8sning<\/figcaption><\/figure>\n<p>Efter al dette gravearbejde bekr\u00e6ftede vi, at der var en lille \u00e6ndring med klientens DNS-udbyder, der stadig blev cachet p\u00e5 deres ende. Vi bad dem om at rydde deres DNS-cache lokalt p\u00e5 deres computer og refreshe siden.<\/p>\n<p>P\u00e5 det tidspunkt begyndte alt at igen indl\u00e6se normalt p\u00e5 deres WordPress site.<\/p>\n<p>At vide, hvordan du rydder din DNS-cache, kan hj\u00e6lpe dig i mange lignende situationer, det kan rette <a href=\"https:\/\/kinsta.com\/dk\/blog\/http-304\/\">fejl som 304<\/a>. Lad os se p\u00e5, hvordan det bliver gjort.<\/p>\n<h3>Hvad er cache? L\u00e6r denne almindelige og komplekse teknologi<\/h3>\n<p class=\"p1\"><kinsta-video src=\"https:\/\/www.youtube.com\/watch?v=oJ0FPBzFJdo\"><\/kinsta-video><\/p>\n<h2>S\u00e5dan flushes din DNS-cache p\u00e5 Mac, Windows, Linux og Chrome<\/h2>\n<p>Sletning af din DNS-cache er en relativt simpel proces, men det varierer afh\u00e6ngigt af dit operativsystem. Det betyder ogs\u00e5, om du skal flushe den fra din computer eller din browser. Nedenfor har vi forklaret, hvordan du udf\u00f8rer denne opgave til macOS-, Windows- og Linux-operativsystemer (OS&#8217;er) s\u00e5vel som i Google Chrome-browseren.<\/p>\n<ul>\n<li><a href=\"#macos\">macOS<\/a><\/li>\n<li><a href=\"#windows\">Windows<\/a><\/li>\n<li><a href=\"#linux\">Linux<\/a><\/li>\n<li><a href=\"#chrome\">Chrome<\/a><\/li>\n<\/ul>\n<h2 id=\"macos\">1. S\u00e5dan ryddes DNS-cache p\u00e5 macOS<\/h2>\n<p>For at rydde DNS-cachen p\u00e5 en Mac skal du \u00e5bne den oprindelige kommandolinje gr\u00e6nseflade kaldet Terminal og k\u00f8re den relevante kommando. Denne proces varierer afh\u00e6ngigt af hvilken version af macOS, du k\u00f8rer.<\/p>\n<p>Hvis du ikke er sikker p\u00e5, hvilken version du arbejder med, skal du klikke p\u00e5 apple ikonet \u00f8verst til venstre p\u00e5 skrivebordet og v\u00e6lge <strong>About this Mac<\/strong>:<\/p>\n<figure style=\"width: 1500px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/dk\/wp-content\/uploads\/sites\/12\/2020\/01\/abning-vinduet-about-this-mac.png\" alt=\"\u00c5bning af vinduet About This Mac\" width=\"1500\" height=\"938\"><figcaption class=\"wp-caption-text\">\u00c5bning af vinduet About This Mac<\/figcaption><\/figure>\n<p>Din nuv\u00e6rende version er det f\u00f8rste stykke information, der er anf\u00f8rt:<\/p>\n<figure style=\"width: 1500px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/dk\/wp-content\/uploads\/sites\/12\/2020\/01\/visning-aktuelle-macos-version.png\" alt=\"Visning af den aktuelle MacOS-version\" width=\"1500\" height=\"911\"><figcaption class=\"wp-caption-text\">Visning af den aktuelle MacOS-version<\/figcaption><\/figure>\n<p>N\u00e5r du kender disse oplysninger, kan du f\u00f8lge de relevante trin nedenfor.<\/p>\n<h3>macOS El Capitan (10.11), Sierra (10.12), High Sierra (10.13), Mojave (10.14) og Catalina (10.15)<\/h3>\n<p>Hvis du arbejder p\u00e5 macOS version 10.11 eller nyere, skal du \u00e5bne kommandolinje gr\u00e6nsefladen ved at klikke p\u00e5 <strong>Go &gt; Utilities<\/strong>:<\/p>\n<figure style=\"width: 1500px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/dk\/wp-content\/uploads\/sites\/12\/2020\/01\/adgang-mac-utilities.png\" alt=\"Adgang til Mac Utilities\" width=\"1500\" height=\"938\"><figcaption class=\"wp-caption-text\">Adgang til Mac Utilities<\/figcaption><\/figure>\n<p>V\u00e6lg derefter <strong>terminal<\/strong>. N\u00e5r det \u00e5bnes, skal du k\u00f8re f\u00f8lgende kommando:<\/p>\n<p><code>sudo killall -HUP mDNSResponder<\/code><\/p>\n<p>Du bliver bedt om at indtaste adgangskoden til din computer:<\/p>\n<figure style=\"width: 1500px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/dk\/wp-content\/uploads\/sites\/12\/2020\/01\/indtastning-administrator-adgangskode-flush.png\" alt=\"Indtastning af administrator-adgangskode for at udf\u00f8re DNS flush-kommandoen\" width=\"1500\" height=\"936\"><figcaption class=\"wp-caption-text\">Indtastning af administrator-adgangskode for at udf\u00f8re DNS flush-kommandoen<\/figcaption><\/figure>\n<p>N\u00e5r du har gjort det, skal din DNS-cache v\u00e6re klar.<\/p>\n<h3>macOS Yosemite (10.10)<\/h3>\n<p>Du kan f\u00e5 adgang til Terminal ved den samme metode, der er beskrevet ovenfor for enhver macOS-version. I Yosemite (10.10) skal du, n\u00e5r vinduet \u00e5bnes, k\u00f8re f\u00f8lgende kommando:<\/p>\n<p><code>sudo discoveryutil udnsflushcaches<\/code><\/p>\n<p>Indtast din computers adgangskode, og DNS-cachen skal flushes med succes.<\/p>\n<h3>macOS Lion (10.7), Mountain Lion (10.8) og Mavericks (10.9)<\/h3>\n<p>For macOS versioner 10.7 til 10.9 skal du \u00e5bne Terminal og k\u00f8re f\u00f8lgende kommando for at rydde din DNS-cache:<\/p>\n<p><code>sudo killall -HUP mDNSResponder<\/code><\/p>\n<p>Du kan bem\u00e6rke, at dette er den samme kommando, der bruges af version 10.11 og nyere. Indtast din adgangskode for at udf\u00f8re den.<\/p>\n<h3>macOS Snow Leopard (10.6)<\/h3>\n<p>Hvis du k\u00f8rer macOS Snow Leopard (10.6), skal du \u00e5bne Terminal og indtaste denne kommando:<\/p>\n<p><code>sudo dscacheutil -flushcache<\/code><\/p>\n<p>Indtast derefter dit kodeord for at slette DNS-cachen.<\/p>\n<h3>macOS Leopard (10.5)<\/h3>\n<p>Endelig skal macOS Leopard (10.5) brugere k\u00f8re f\u00f8lgende kommando i Terminal:<\/p>\n<p><code>sudo lookupd -flushcache<\/code><\/p>\n<p>N\u00e5r du har indtastet din adgangskode, skal DNS-cachen flushes.<\/p>\n<p>Rydning af din DNS-cache er ogs\u00e5 l\u00f8sningen til at rette<a href=\"https:\/\/kinsta.com\/dk\/blog\/err_spdy_protocol_error\/\"> ERR_SPDY_PROTOCOL_ERROR\u00a0<\/a>.<\/p>\n<h2 id=\"windows\">2. S\u00e5dan ryddes DNS-cache p\u00e5 Windows<\/h2>\n<p>At flushe din DNS-cache p\u00e5 en Windows-computer er ret enkel. S\u00e5dan udf\u00f8res denne opgave i Windows 10, 8, 7 og XP.<\/p>\n<h3>Windows 10<\/h3>\n<p>For at rydde din DNS-cache p\u00e5 et Windows OS skal du <a href=\"https:\/\/www.lifewire.com\/command-prompt-2625840\">\u00e5bne Command prompt<\/a>, systemets kommandolinje gr\u00e6nseflade. Du kan f\u00e5 adgang til dette program i Windows 10 ved at klikke p\u00e5 knappen <strong>Start<\/strong>. Naviger derefter til <strong>Windows Systems &gt; Command Prompt<\/strong>:<\/p>\n<figure style=\"width: 906px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/dk\/wp-content\/uploads\/sites\/12\/2020\/01\/abning-command-prompt-windows-start.png\" alt=\"\u00c5bning af command prompt fra Windows Start-menuen\" width=\"906\" height=\"625\"><figcaption class=\"wp-caption-text\">\u00c5bning af command prompt fra Windows Start-menuen<\/figcaption><\/figure>\n<p>N\u00e5r kommandolinje gr\u00e6nsefladen er \u00e5ben, skal du indtaste f\u00f8lgende linje:<\/p>\n<p><code>ipconfig \/flushdns<\/code><\/p>\n<p>Denne kommando skal returnere en bekr\u00e6ftelse af, at DNS-cachen er blevet flushet:<\/p>\n<figure style=\"width: 1004px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/dk\/wp-content\/uploads\/sites\/12\/2020\/01\/bekraeftelsesmeddelelse-command-prompt-dns.png\" alt=\"Bekr\u00e6ftelsesmeddelelse til command prompt DNS-cache flush\" width=\"1004\" height=\"227\"><figcaption class=\"wp-caption-text\">Bekr\u00e6ftelsesmeddelelse til command prompt DNS-cache flush<\/figcaption><\/figure>\n<p>Du kan derefter lukke vinduet command prompt.<\/p>\n<h3>Windows 8<\/h3>\n<p>Rydning af din DNS-cache i \u00e6ldre versioner af Windows kr\u00e6ver den samme kommando <code>ipconfig \/ flushdns<\/code>. Trinene til adgang til command prompt er dog lidt forskellige mellem versionerne.<\/p>\n<p>I Windows 8 skal du \u00e5bne sk\u00e6rmen Apps. L\u00e6ngst til h\u00f8jre finder du <strong>Windows Systems<\/strong> og v\u00e6lg <strong>Command Prompt<\/strong>.<\/p>\n<p>N\u00e5r programmet \u00e5bnes, skal du k\u00f8re <code>ipconfig \/flushdns<\/code>. Du skal modtage en bekr\u00e6ftelse, n\u00e5r DNS-cachen er blevet ryddet.<\/p>\n<h3>Windows 7 og Windows XP\u2019<\/h3>\n<p>I Windows 7 eller Windows XP skal du klikke p\u00e5 knappen <strong>Start<\/strong>. Naviger til <strong>All programs&gt; Accessories<\/strong>, og v\u00e6lg <strong>Command Prompt<\/strong>.<\/p>\n<p>K\u00f8r <code>ipconfig \/ flushdns<\/code> i kommandolinje gr\u00e6nsefladen. Du vil modtage en bekr\u00e6ftelsesmeddelelse, n\u00e5r DNS-cachen er flushed.<\/p>\n<h2 id=\"linux\">3. S\u00e5dan ryddes DNS-cache p\u00e5 Linux<\/h2>\n<p>At flushe din DNS-cachen p\u00e5 Linux-maskiner svarer tilsvarende til processen hvor man g\u00f8r det p\u00e5 en Mac- eller Windows-computer. S\u00e5dan g\u00f8r du.<\/p>\n<h3>Ubuntu<\/h3>\n<p>Linux bruger Terminal som sin kommandolinje gr\u00e6nseflade, ligesom macOS. For at \u00e5bne det skal du klikke p\u00e5 <strong>Activities<\/strong> i \u00f8verste venstre hj\u00f8rne af dit desktop. Dette giver dig et s\u00f8gefelt, hvor du kan g\u00e5 ind i &#8220;terminal&#8221; for at finde og starte programmet.<\/p>\n<p>N\u00e5r kommandolinje gr\u00e6nsefladen er \u00e5ben, skal du udf\u00f8re denne kommando:<\/p>\n<p><code>sudo systemd-resolve --flushcaches<\/code><\/p>\n<p>Terminalen vil derefter bede dig om dit password. Indtast det for at afslutte udf\u00f8relsen af \u200b\u200bkommandoen og flushe din DNS-cache.<\/p>\n<h3>Andre distributioner<\/h3>\n<p>Hvis du bruger en anden Linux-distribution end Ubuntu, kan du skylle din DNS-cache ved at \u00e5bne din kommandolinjegr\u00e6nseflade og k\u00f8re denne kommando:<\/p>\n<p><code>sudo \/etc\/init.d\/dns-clean start<\/code><\/p>\n<p>N\u00e5r kommandoen er udf\u00f8rt, vil din cache v\u00e6re klar.<\/p>\n<h2 id=\"chrome\">4. S\u00e5dan ryddes DNS-cache p\u00e5 Google Chrome<\/h2>\n<p>Endelig, som vi n\u00e6vnte i begyndelsen af \u200b\u200bdette indl\u00e6g, kan du have grund til at rydde din browsers DNS-cache i stedet for dit operativsystem. I Google Chrome kan du g\u00f8re det ved at indtaste f\u00f8lgende i adresselinjen:<\/p>\n<p>chrome:\/\/net-internals\/#dns<\/p>\n<p>Klik derefter p\u00e5 knappen <strong>Clear host cache<\/strong>:<\/p>\n<figure style=\"width: 1500px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/dk\/wp-content\/uploads\/sites\/12\/2020\/01\/knapper-clear-host-cache-google-chrome.png\" alt=\"Knappen Clear host cache i Google Chrome\" width=\"1500\" height=\"487\"><figcaption class=\"wp-caption-text\">Knappen Clear host cache i Google Chrome<\/figcaption><\/figure>\n<p>Dette vil fklsuhe Chromes DNS-cache for dig.<\/p>\n<p>Brug for at rydde browserens cache, skal du tjekke ud: <a href=\"https:\/\/kinsta.com\/dk\/blog\/sadan-rydder-cache-browsere\/\">How to Clear Browser Cache for All Major Browsers<\/a>.<\/p>\n\n<h2>Resum\u00e9<\/h2>\n<p>Udsigten til at rydde din DNS-cache kan lyde afskr\u00e6kkende, is\u00e6r hvis du er ny til fejlfinding af internetforbindelse eller andre webstedsproblemer. Heldigvis er selve processen temmelig ligetil.<\/p>\n<p>At flushe din DNS-cache kr\u00e6ver kun et par trin. F\u00f8rst skal du vide, hvilket operativsystem og hvilken version du bruger. Derefter kan du f\u00f8lge de relevante trin ovenfor og rydde DNS-cachen ved at indtaste en eller to enkle kommandoer.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fejlfinding p\u00e5 dit websted kan v\u00e6re et skr\u00e6mmende ansvar. N\u00e5r det kommer til opgaver som at flushe din Domain Name Server (DNS) cache, er det let &#8230;<\/p>\n","protected":false},"author":103,"featured_media":35803,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[150,197],"topic":[692,698],"class_list":["post-35793","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-caching","tag-web-development","topic-domain-name-system","topic-google-chrome"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>S\u00e5dan flushes DNS-cache (Windows, Mac, Chrome)<\/title>\n<meta name=\"description\" content=\"F\u00e5r du 404 sider p\u00e5 dit website? Dette kan skyldes en DNS-\u00e6ndring. 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