{"id":15440,"date":"2025-09-08T10:00:37","date_gmt":"2025-09-08T02:00:37","guid":{"rendered":"https:\/\/www.quape.com\/?p=15440"},"modified":"2025-09-09T13:18:35","modified_gmt":"2025-09-09T05:18:35","slug":"what-is-error-501-and-how-to-fix-it-quickly","status":"publish","type":"post","link":"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/","title":{"rendered":"L\u1ed7i 501 l\u00e0 g\u00ec v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c nhanh ch\u00f3ng?"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><p>Vi\u1ec7c g\u1eb7p ph\u1ea3i m\u00e3 l\u1ed7i tr\u00ean trang web c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t tr\u1ea3i nghi\u1ec7m kh\u00f3 hi\u1ec3u v\u00e0 b\u1ef1c b\u1ed9i. M\u1eb7c d\u00f9 h\u1ea7u h\u1ebft ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec1u quen thu\u1ed9c v\u1edbi l\u1ed7i chung chung &quot;L\u1ed7i 404: Kh\u00f4ng t\u00ecm th\u1ea5y trang&quot;, m\u1ed9t v\u1ea5n \u0111\u1ec1 \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n nh\u01b0ng c\u0169ng g\u00e2y kh\u00f3 ch\u1ecbu kh\u00f4ng k\u00e9m l\u00e0 <b>L\u1ed7i 501: Ch\u01b0a tri\u1ec3n khai<\/b>L\u1ed7i ph\u00eda m\u00e1y ch\u1ee7 n\u00e0y ch\u1ec9 ra m\u1ed9t v\u1ea5n \u0111\u1ec1 r\u1ea5t c\u1ee5 th\u1ec3: m\u00e1y ch\u1ee7 web c\u1ee7a b\u1ea1n kh\u00f4ng nh\u1eadn ra ph\u01b0\u01a1ng th\u1ee9c y\u00eau c\u1ea7u \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 truy c\u1eadp trang. M\u1eb7c d\u00f9 \u0111i\u1ec1u n\u00e0y nghe c\u00f3 v\u1ebb r\u1ea5t k\u1ef9 thu\u1eadt, nh\u01b0ng nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 th\u01b0\u1eddng \u0111\u01a1n gi\u1ea3n h\u01a1n b\u1ea1n ngh\u0129 v\u00e0 c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c b\u1eb1ng c\u00e1c b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n.<\/p>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd gi\u1ea3i th\u00edch <b>L\u1ed7i 501 c\u00f3 ngh\u0129a l\u00e0 g\u00ec<\/b>, nguy\u00ean nh\u00e2n g\u00e2y ra l\u1ed7i v\u00e0 \u0111\u01b0a ra k\u1ebf ho\u1ea1ch r\u00f5 r\u00e0ng, t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 gi\u1ea3i quy\u1ebft nhanh ch\u00f3ng v\u00e0 \u0111\u01b0a trang web c\u1ee7a b\u1ea1n tr\u1edf l\u1ea1i ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/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=\"Chuy\u1ec3n \u0111\u1ed5i m\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Chuy\u1ec3n \u0111\u1ed5i<\/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:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#Understanding_Error_501_A_Servers_%E2%80%9CI_Dont_Know_How%E2%80%9D_Response\" >Hi\u1ec3u v\u1ec1 L\u1ed7i 501: Ph\u1ea3n h\u1ed3i &quot;T\u00f4i kh\u00f4ng bi\u1ebft c\u00e1ch&quot; c\u1ee7a M\u00e1y ch\u1ee7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#Common_Causes_of_Error_501\" >Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y ra l\u1ed7i 501<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#1_Unsupported_Request_Method\" >1. Ph\u01b0\u01a1ng th\u1ee9c y\u00eau c\u1ea7u kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#2_Outdated_Server_Software\" >2. Ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 l\u1ed7i th\u1eddi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#3_Misconfigured_Server_Modules\" >3. M\u00f4-\u0111un m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh sai<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#4_Malicious_Activity\" >4. Ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c h\u1ea1i<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#How_to_Fix_Error_501_A_Quick_Troubleshooting_Guide\" >C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i 501: H\u01b0\u1edbng d\u1eabn kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 nhanh<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#Step_1_Clear_Your_Browsers_Cache_and_Cookies\" >B\u01b0\u1edbc 1: X\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 cookie c\u1ee7a tr\u00ecnh duy\u1ec7t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#Step_2_Update_Your_Servers_Software\" >B\u01b0\u1edbc 2: C\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#Step_3_Check_Your_Websites_Code\" >B\u01b0\u1edbc 3: Ki\u1ec3m tra m\u00e3 trang web c\u1ee7a b\u1ea1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#Step_4_Contact_Your_Hosting_Providers_Support\" >B\u01b0\u1edbc 4: Li\u00ean h\u1ec7 v\u1edbi b\u1ed9 ph\u1eadn h\u1ed7 tr\u1ee3 c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef c\u1ee7a b\u1ea1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#Step_5_Check_Your_DNS_Records\" >B\u01b0\u1edbc 5: Ki\u1ec3m tra b\u1ea3n ghi DNS c\u1ee7a b\u1ea1n<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.quape.com\/vi\/what-is-error-501-and-how-to-fix-it-quickly\/#Conclusion\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Understanding_Error_501_A_Servers_%E2%80%9CI_Dont_Know_How%E2%80%9D_Response\"><\/span>Hi\u1ec3u v\u1ec1 L\u1ed7i 501: Ph\u1ea3n h\u1ed3i &quot;T\u00f4i kh\u00f4ng bi\u1ebft c\u00e1ch&quot; c\u1ee7a M\u00e1y ch\u1ee7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-15453 size-full\" src=\"https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/What-is-Error-501.png\" alt=\"L\u1ed7i 501 l\u00e0 g\u00ec?\" width=\"1108\" height=\"751\" srcset=\"https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/What-is-Error-501.png 1108w, https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/What-is-Error-501-300x203.png 300w, https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/What-is-Error-501-1024x694.png 1024w, https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/What-is-Error-501-768x521.png 768w, https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/What-is-Error-501-18x12.png 18w\" sizes=\"(max-width: 1108px) 100vw, 1108px\" \/><\/p>\n<p><b>L\u1ed7i 501<\/b> l\u00e0 m\u1ed9t <b>M\u00e3 tr\u1ea1ng th\u00e1i HTTP<\/b> \u0110i\u1ec1u n\u00e0y cho b\u1ea1n bi\u1ebft m\u00e1y ch\u1ee7 web kh\u00f4ng h\u1ed7 tr\u1ee3 ch\u1ee9c n\u0103ng c\u1ea7n thi\u1ebft \u0111\u1ec3 th\u1ef1c hi\u1ec7n y\u00eau c\u1ea7u. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, tr\u00ecnh duy\u1ec7t \u0111\u00e3 g\u1eedi y\u00eau c\u1ea7u b\u1eb1ng m\u1ed9t l\u1ec7nh c\u1ee5 th\u1ec3 (nh\u01b0 GET, POST ho\u1eb7c PUT), nh\u01b0ng m\u00e1y ch\u1ee7 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng x\u1eed l\u00fd l\u1ec7nh c\u1ee5 th\u1ec3 \u0111\u00f3 cho t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<\/p>\n<p>V\u00ed d\u1ee5, m\u1ed9t y\u00eau c\u1ea7u chu\u1ea9n \u0111\u1ec3 t\u1ea3i m\u1ed9t trang s\u1eed d\u1ee5ng <code>L\u1ea4Y<\/code> ph\u01b0\u01a1ng ph\u00e1p. N\u1ebfu b\u1ea1n \u0111ang c\u1ed1 g\u1eafng \u0111\u0103ng d\u1eef li\u1ec7u l\u00ean m\u1ed9t bi\u1ec3u m\u1eabu, <code>B\u01afU KI\u1ec6N<\/code> ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. N\u1ebfu m\u00e1y ch\u1ee7 nh\u1eadn \u0111\u01b0\u1ee3c <code>L\u1ea4Y<\/code> y\u00eau c\u1ea7u m\u1ed9t trang nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1ec3 x\u1eed l\u00fd, n\u00f3 s\u1ebd tr\u1ea3 v\u1ec1 l\u1ed7i 501.<\/p>\n<p>Kh\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t <code>L\u1ed7i m\u00e1y ch\u1ee7 n\u1ed9i b\u1ed9 500<\/code>, \u0111\u00f3 l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 chung, <code>501<\/code> L\u1ed7i n\u00e0y r\u1ea5t c\u1ee5 th\u1ec3. \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ed7i t\u1ea1m th\u1eddi; m\u00e0 l\u00e0 th\u00f4ng b\u00e1o t\u1eeb m\u00e1y ch\u1ee7 cho bi\u1ebft: &quot;T\u00f4i kh\u00f4ng \u0111\u1ee7 kh\u1ea3 n\u0103ng x\u1eed l\u00fd lo\u1ea1i y\u00eau c\u1ea7u n\u00e0y&quot;.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Common_Causes_of_Error_501\"><\/span>Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y ra l\u1ed7i 501<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1eb7c d\u00f9 L\u1ed7i 501 \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n c\u00e1c l\u1ed7i m\u00e1y ch\u1ee7 kh\u00e1c, nh\u01b0ng n\u00f3 th\u01b0\u1eddng b\u1eaft ngu\u1ed3n t\u1eeb m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Unsupported_Request_Method\"><\/span>1. Ph\u01b0\u01a1ng th\u1ee9c y\u00eau c\u1ea7u kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nguy\u00ean nh\u00e2n tr\u1ef1c ti\u1ebfp nh\u1ea5t l\u00e0 tr\u00ecnh duy\u1ec7t ho\u1eb7c \u1ee9ng d\u1ee5ng \u0111ang s\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c y\u00eau c\u1ea7u m\u00e0 m\u00e1y ch\u1ee7 web c\u1ee7a b\u1ea1n (v\u00ed d\u1ee5: Apache ho\u1eb7c Nginx) kh\u00f4ng h\u1ed7 tr\u1ee3. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra n\u1ebfu tr\u00ecnh duy\u1ec7t l\u1ed7i th\u1eddi, bot ho\u1eb7c \u1ee9ng d\u1ee5ng t\u00f9y ch\u1ec9nh \u0111ang th\u1ef1c hi\u1ec7n y\u00eau c\u1ea7u b\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c kh\u00f4ng chu\u1ea9n ho\u1eb7c \u0111\u00e3 l\u1ed7i th\u1eddi.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Outdated_Server_Software\"><\/span>2. Ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 l\u1ed7i th\u1eddi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 web c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 \u0111ang ch\u1ea1y phi\u00ean b\u1ea3n c\u0169, kh\u00f4ng h\u1ed7 tr\u1ee3 ph\u01b0\u01a1ng th\u1ee9c HTTP c\u1ee5 th\u1ec3 m\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng ho\u1eb7c tr\u00ecnh duy\u1ec7t hi\u1ec7n \u0111\u1ea1i y\u00eau c\u1ea7u. M\u00e1y ch\u1ee7 l\u1ed7i th\u1eddi c\u0169ng c\u00f3 th\u1ec3 thi\u1ebfu c\u00e1c b\u1ea3n v\u00e1 b\u1ea3o m\u1eadt v\u00e0 ch\u1ee9c n\u0103ng m\u1edbi nh\u1ea5t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Misconfigured_Server_Modules\"><\/span>3. M\u00f4-\u0111un m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh sai<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t s\u1ed1 m\u00f4-\u0111un ho\u1eb7c tr\u00ecnh x\u1eed l\u00fd m\u00e1y ch\u1ee7 nh\u1ea5t \u0111\u1ecbnh \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c y\u00eau c\u1ea7u c\u1ee5 th\u1ec3. N\u1ebfu m\u1ed9t m\u00f4-\u0111un c\u1ea7n thi\u1ebft b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a ho\u1eb7c c\u1ea5u h\u00ecnh sai, l\u1ed7i 501 c\u00f3 th\u1ec3 x\u1ea3y ra.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Malicious_Activity\"><\/span>4. Ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c h\u1ea1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, l\u1ed7i 501 c\u00f3 th\u1ec3 do bot ho\u1eb7c tin t\u1eb7c c\u1ed1 g\u1eafng khai th\u00e1c l\u1ed7 h\u1ed5ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c y\u00eau c\u1ea7u kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1eadn d\u1ea1ng ho\u1eb7c \u0111\u1ed9c h\u1ea1i.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Fix_Error_501_A_Quick_Troubleshooting_Guide\"><\/span>C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i 501: H\u01b0\u1edbng d\u1eabn kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 nhanh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-15456 size-full\" src=\"https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/How-to-Fix-Error-501-A-Quick-Troubleshooting-Guide.png\" alt=\"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i 501: H\u01b0\u1edbng d\u1eabn kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 nhanh\" width=\"1023\" height=\"726\" srcset=\"https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/How-to-Fix-Error-501-A-Quick-Troubleshooting-Guide.png 1023w, https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/How-to-Fix-Error-501-A-Quick-Troubleshooting-Guide-300x213.png 300w, https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/How-to-Fix-Error-501-A-Quick-Troubleshooting-Guide-768x545.png 768w, https:\/\/www.quape.com\/wp-content\/uploads\/2025\/09\/How-to-Fix-Error-501-A-Quick-Troubleshooting-Guide-18x12.png 18w\" sizes=\"(max-width: 1023px) 100vw, 1023px\" \/><\/p>\n<p>Gi\u1ea3i ph\u00e1p cho l\u1ed7i n\u00e0y th\u01b0\u1eddng bao g\u1ed3m vi\u1ec7c ki\u1ec3m tra c\u1ea5u h\u00ecnh v\u00e0 ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n. H\u00e3y l\u00e0m theo c\u00e1c b\u01b0\u1edbc sau \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_1_Clear_Your_Browsers_Cache_and_Cookies\"><\/span>B\u01b0\u1edbc 1: X\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 cookie c\u1ee7a tr\u00ecnh duy\u1ec7t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt, h\u00e3y b\u1eaft \u0111\u1ea7u v\u1edbi gi\u1ea3i ph\u00e1p \u0111\u01a1n gi\u1ea3n nh\u1ea5t. B\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a tr\u00ecnh duy\u1ec7t \u0111\u00f4i khi c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i 501 n\u1ebfu phi\u00ean b\u1ea3n trang b\u1ecb l\u1ed7i.<\/p>\n<ul>\n<li><b>X\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 cookie c\u1ee7a tr\u00ecnh duy\u1ec7t.<\/b><\/li>\n<li><b>T\u1ea3i l\u1ea1i trang.<\/b> N\u1ebfu l\u1ed7i v\u1eabn ti\u1ebfp di\u1ec5n, b\u1ea1n bi\u1ebft \u0111\u00f3 l\u00e0 s\u1ef1 c\u1ed1 \u1edf ph\u00eda m\u00e1y ch\u1ee7.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Step_2_Update_Your_Servers_Software\"><\/span>B\u01b0\u1edbc 2: C\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu l\u1ed7i do ph\u1ea7n m\u1ec1m l\u1ed7i th\u1eddi g\u00e2y ra, gi\u1ea3i ph\u00e1p l\u00e0 c\u1eadp nh\u1eadt m\u00e1y ch\u1ee7 web (v\u00ed d\u1ee5: Apache, Nginx) v\u00e0 PHP l\u00ean phi\u00ean b\u1ea3n \u1ed5n \u0111\u1ecbnh m\u1edbi nh\u1ea5t.<\/p>\n<ul>\n<li><b>\u0110\u0103ng nh\u1eadp v\u00e0o b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n l\u01b0u tr\u1eef c\u1ee7a b\u1ea1n<\/b> (gi\u1ed1ng nh\u01b0 cPanel).<\/li>\n<li><b>T\u00ecm ph\u1ea7n \u201cPh\u1ea7n m\u1ec1m\u201d ho\u1eb7c \u201cPhi\u00ean b\u1ea3n PHP\u201d.<\/b><\/li>\n<li><b>C\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m c\u1ee7a b\u1ea1n<\/b> l\u00ean phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t hi\u1ec7n c\u00f3. \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft ng\u01b0\u1eddi d\u00f9ng d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef chia s\u1ebb, nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 s\u1ebd qu\u1ea3n l\u00fd c\u00e1c b\u1ea3n c\u1eadp nh\u1eadt n\u00e0y. N\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng VPS ho\u1eb7c m\u00e1y ch\u1ee7 chuy\u00ean d\u1ee5ng, b\u1ea1n s\u1ebd c\u1ea7n t\u1ef1 th\u1ef1c hi\u1ec7n c\u00e1c b\u1ea3n c\u1eadp nh\u1eadt n\u00e0y.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Step_3_Check_Your_Websites_Code\"><\/span>B\u01b0\u1edbc 3: Ki\u1ec3m tra m\u00e3 trang web c\u1ee7a b\u1ea1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t l\u1ed7i trong m\u00e3 trang web ho\u1eb7c plugin c\u00f3 th\u1ec3 khi\u1ebfn trang web g\u1eedi y\u00eau c\u1ea7u kh\u00f4ng h\u1ee3p l\u1ec7 \u0111\u1ebfn m\u00e1y ch\u1ee7.<\/p>\n<ul>\n<li><b>Ki\u1ec3m tra nh\u1eefng thay \u0111\u1ed5i g\u1ea7n \u0111\u00e2y:<\/b> B\u1ea1n v\u1eeba c\u00e0i \u0111\u1eb7t plugin, theme ho\u1eb7c m\u00e3 t\u00f9y ch\u1ec9nh m\u1edbi? H\u00e3y th\u1eed t\u1eaft plugin, theme ho\u1eb7c m\u00e3 t\u00f9y ch\u1ec9nh m\u1edbi \u0111\u1ec3 xem l\u1ed7i \u0111\u00e3 \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c ch\u01b0a.<\/li>\n<li><b>Ch\u1ea1y qu\u00e9t b\u1ea3o m\u1eadt:<\/b> Nhi\u1ec5m ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i c\u0169ng c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i 501. H\u00e3y s\u1eed d\u1ee5ng plugin b\u1ea3o m\u1eadt ho\u1eb7c tr\u00ecnh qu\u00e9t \u0111\u1ec3 ki\u1ec3m tra trang web c\u1ee7a b\u1ea1n xem c\u00f3 t\u1ec7p \u0111\u1ed9c h\u1ea1i n\u00e0o kh\u00f4ng.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Step_4_Contact_Your_Hosting_Providers_Support\"><\/span>B\u01b0\u1edbc 4: Li\u00ean h\u1ec7 v\u1edbi b\u1ed9 ph\u1eadn h\u1ed7 tr\u1ee3 c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef c\u1ee7a b\u1ea1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu b\u1ea1n \u0111\u00e3 th\u1eed c\u00e1c b\u01b0\u1edbc tr\u00ean v\u00e0 l\u1ed7i v\u1eabn c\u00f2n, th\u00ec v\u1ea5n \u0111\u1ec1 r\u1ea5t c\u00f3 th\u1ec3 l\u00e0 do l\u1ed7i c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7 m\u00e0 ch\u1ec9 m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n g\u1eb7p ph\u1ea3i. <a href=\"https:\/\/www.quape.com\/vi\/hosting\/\">hosting<\/a> nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 s\u1eeda ch\u1eefa.<\/p>\n<ul>\n<li><b>Cung c\u1ea5p th\u00f4ng tin chi ti\u1ebft:<\/b> Khi li\u00ean h\u1ec7 v\u1edbi b\u1ed9 ph\u1eadn h\u1ed7 tr\u1ee3, h\u00e3y chu\u1ea9n b\u1ecb cung c\u1ea5p cho h\u1ecd URL c\u1ee7a trang hi\u1ec3n th\u1ecb l\u1ed7i, m\u1ecdi thay \u0111\u1ed5i g\u1ea7n \u0111\u00e2y b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n v\u00e0 th\u1eddi gian c\u1ee5 th\u1ec3 x\u1ea3y ra l\u1ed7i.<\/li>\n<li><b>H\u1ecfi v\u1ec1 nh\u1eadt k\u00fd:<\/b> Y\u00eau c\u1ea7u h\u1ecd ki\u1ec3m tra nh\u1eadt k\u00fd m\u00e1y ch\u1ee7 \u0111\u1ec3 t\u00ecm l\u1ed7i c\u1ee5 th\u1ec3. Nh\u1eadt k\u00fd c\u00f3 th\u1ec3 cung c\u1ea5p cho h\u1ecd l\u00fd do ch\u00ednh x\u00e1c cho l\u1ed7i 501, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00f4-\u0111un b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Step_5_Check_Your_DNS_Records\"><\/span>B\u01b0\u1edbc 5: Ki\u1ec3m tra b\u1ea3n ghi DNS c\u1ee7a b\u1ea1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p hi\u1ebfm hoi, c\u1ea5u h\u00ecnh DNS kh\u00f4ng \u0111\u00fang c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn m\u00e1y ch\u1ee7 sai, c\u00f3 th\u1ec3 kh\u00f4ng h\u1ed7 tr\u1ee3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u1ea7n thi\u1ebft.<\/p>\n<ul>\n<li><b>X\u00e1c minh b\u1ea3n ghi DNS c\u1ee7a b\u1ea1n<\/b> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u00fang \u0111ang tr\u1ecf \u0111\u1ebfn \u0111\u00fang \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7.<\/li>\n<li><b>N\u1ebfu b\u1ea1n v\u1eeba di chuy\u1ec3n trang web c\u1ee7a m\u00ecnh<\/b>, cho ph\u00e9p th\u1eddi gian \u0111\u1ec3 truy\u1ec1n b\u00e1 DNS.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>G\u1eb7p g\u1ee1 <b>L\u1ed7i 501: Ch\u01b0a tri\u1ec3n khai<\/b> l\u00e0 m\u1ed9t t\u00edn hi\u1ec7u r\u00f5 r\u00e0ng cho th\u1ea5y m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n kh\u00f4ng th\u1ec3 x\u1eed l\u00fd m\u1ed9t lo\u1ea1i y\u00eau c\u1ea7u c\u1ee5 th\u1ec3. M\u1eb7c d\u00f9 c\u00f3 v\u1ebb \u0111\u00e1ng lo ng\u1ea1i, nh\u01b0ng gi\u1ea3i ph\u00e1p th\u01b0\u1eddng n\u1eb1m \u1edf nh\u1eefng h\u00e0nh \u0111\u1ed9ng \u0111\u01a1n gi\u1ea3n nh\u01b0 x\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m, c\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m m\u00e1y ch\u1ee7 ho\u1eb7c, \u0111\u00e1ng tin c\u1eady nh\u1ea5t, li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef. B\u1eb1ng c\u00e1ch l\u00e0m theo h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 nhanh ch\u00f3ng t\u00ecm ra g\u1ed1c r\u1ec5 c\u1ee7a v\u1ea5n \u0111\u1ec1 v\u00e0 \u0111\u1ea3m b\u1ea3o trang web c\u1ee7a m\u00ecnh ho\u1ea1t \u0111\u1ed9ng tr\u01a1n tru.<\/p>\n<p>B\u1ea1n \u0111ang t\u00ecm ki\u1ebfm nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web \u01b0u ti\u00ean hi\u1ec7u su\u1ea5t v\u00e0 h\u1ed7 tr\u1ee3 chuy\u00ean m\u00f4n? <b>Quape, m\u1ed9t c\u00f4ng ty cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web v\u00e0 t\u00ean mi\u1ec1n h\u00e0ng \u0111\u1ea7u t\u1ea1i Singapore, cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p l\u01b0u tr\u1eef hi\u1ec7u su\u1ea5t cao \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng tr\u00ean c\u00f4ng ngh\u1ec7 m\u1edbi nh\u1ea5t.<\/b> \u0110\u1ed9i ng\u0169 c\u1ee7a ch\u00fang t\u00f4i t\u1eadn t\u00e2m cung c\u1ea5p c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1nh m\u1ebd v\u00e0 h\u1ed7 tr\u1ee3 nhanh ch\u00f3ng, \u0111\u00e1ng tin c\u1eady, \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 t\u1eadp trung v\u00e0o trang web c\u1ee7a m\u00ecnh m\u00e0 kh\u00f4ng ph\u1ea3i lo l\u1eafng v\u1ec1 c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ef9 thu\u1eadt. Kh\u00e1m ph\u00e1 <a href=\"https:\/\/order.quape.com\/\" target=\"_blank\" rel=\"noopener\">D\u1ecbch v\u1ee5 l\u01b0u tr\u1eef c\u1ee7a Quape<\/a> gi\u1ea3i ph\u00e1p ngay h\u00f4m nay v\u00e0 \u0111\u1ea3m b\u1ea3o m\u1ed9t n\u01a1i \u0111\u00e1ng tin c\u1eady cho trang web c\u1ee7a b\u1ea1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Encountering an error code on your website can be a confusing and frustrating experience. While most users are familiar with the generic &#8220;Error 404: Page Not Found,&#8221; a less common but equally vexing issue is Error 501: Not Implemented. This server-side error indicates a very specific problem: your web server does not recognize the request [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":15457,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[347,229],"class_list":["post-15440","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-web-server","tag-website"],"_links":{"self":[{"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/posts\/15440","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/comments?post=15440"}],"version-history":[{"count":0,"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/posts\/15440\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/media\/15457"}],"wp:attachment":[{"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/media?parent=15440"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/categories?post=15440"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.quape.com\/vi\/wp-json\/wp\/v2\/tags?post=15440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}