{"id":41603,"date":"2026-06-08T14:45:16","date_gmt":"2026-06-08T07:45:16","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=41603"},"modified":"2026-06-08T14:45:16","modified_gmt":"2026-06-08T07:45:16","slug":"lenh-less-trong-linux","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/","title":{"rendered":"C\u00e1ch d\u00f9ng l\u1ec7nh less trong Linux v\u1edbi 10 k\u1ecbch b\u1ea3n th\u1ef1c t\u1ebf 2026"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/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 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Ban-chat-cua-lenh-less-trong-Linux-la-gi\" >B\u1ea3n ch\u1ea5t c\u1ee7a l\u1ec7nh less trong Linux l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#9-tham-so-mo-rong-Options-cua-lenh-less\" >9 tham s\u1ed1 m\u1edf r\u1ed9ng (Options) c\u1ee7a l\u1ec7nh less<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#10-kich-ban-thuc-te-ung-dung-lenh-less\" >10 k\u1ecbch b\u1ea3n th\u1ef1c t\u1ebf \u1ee9ng d\u1ee5ng l\u1ec7nh less<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-1-Truy-cap-noi-dung-tep-van-ban-co-ban\" >V\u00ed d\u1ee5 1: Truy c\u1eadp n\u1ed9i dung t\u1ec7p v\u0103n b\u1ea3n c\u01a1 b\u1ea3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-2-Hien-thi-van-ban-kem-theo-danh-so-dong\" >V\u00ed d\u1ee5 2: Hi\u1ec3n th\u1ecb v\u0103n b\u1ea3n k\u00e8m theo \u0111\u00e1nh s\u1ed1 d\u00f2ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-3-Truy-vet-tu-khoa-ben-trong-tai-lieu\" >V\u00ed d\u1ee5 3: Truy v\u1ebft t\u1eeb kh\u00f3a b\u00ean trong t\u00e0i li\u1ec7u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-4-Khoi-chay-file-tu-vi-tri-chua-tu-khoa\" >V\u00ed d\u1ee5 4: Kh\u1edfi ch\u1ea1y file t\u1eeb v\u1ecb tr\u00ed ch\u1ee9a t\u1eeb kh\u00f3a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-5-Loc-bo-cac-khoang-trang-thua\" >V\u00ed d\u1ee5 5: L\u1ecdc b\u1ecf c\u00e1c kho\u1ea3ng tr\u1eafng th\u1eeba<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-6-Doc-song-song-nhieu-tep-tin\" >V\u00ed d\u1ee5 6: \u0110\u1ecdc song song nhi\u1ec1u t\u1ec7p tin<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-7-Danh-dau-Bookmark-doan-van-ban\" >V\u00ed d\u1ee5 7: \u0110\u00e1nh d\u1ea5u (Bookmark) \u0111o\u1ea1n v\u0103n b\u1ea3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-8-Giam-sat-luong-du-lieu-theo-thoi-gian-thuc-Real-time\" >V\u00ed d\u1ee5 8: Gi\u00e1m s\u00e1t lu\u1ed3ng d\u1eef li\u1ec7u theo th\u1eddi gian th\u1ef1c (Real-time)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-9-Day-luong-du-lieu-sang-lenh-less-Pipe\" >V\u00ed d\u1ee5 9: \u0110\u1ea9y lu\u1ed3ng d\u1eef li\u1ec7u sang l\u1ec7nh less (Pipe)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/lenh-less-trong-linux\/#Vi-du-10-Chuyen-sang-trinh-soan-thao-ngay-trong-lenh-less\" >V\u00ed d\u1ee5 10: Chuy\u1ec3n sang tr\u00ecnh so\u1ea1n th\u1ea3o ngay trong l\u1ec7nh less<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>Khi thao t\u00e1c tr\u00ean h\u1ec7 th\u1ed1ng <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh-linux-la-gi\/\">Linux<\/a>,\u00a0<code>less\u00a0<\/code>\u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn nh\u01b0 m\u1ed9t ti\u1ec7n \u00edch kh\u00f4ng th\u1ec3 thi\u1ebfu gi\u00fap qu\u1ea3n tr\u1ecb vi\u00ean xem tr\u01b0\u1edbc n\u1ed9i dung c\u00e1c t\u1ec7p tin m\u1ed9t c\u00e1ch c\u1ef1c k\u1ef3 thu\u1eadn ti\u1ec7n. D\u00f9 v\u1eady, s\u1ee9c m\u1ea1nh c\u1ee7a c\u00f4ng c\u1ee5 n\u00e0y kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf vi\u1ec7c &#8220;\u0111\u1ecdc file&#8221;. H\u00e3y c\u00f9ng kh\u00e1m ph\u00e1 chi ti\u1ebft c\u00e1c t\u00ednh n\u0103ng \u1ea9n gi\u1ea5u c\u1ee7a <code>less<\/code> th\u00f4ng qua h\u00e0ng lo\u1ea1t v\u00ed d\u1ee5 tr\u1ef1c quan ngay d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-41616 size-full\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Cach-dung-lenh-less-trong-Linux.png\" alt=\"C\u00e1ch d\u00f9ng l\u1ec7nh less trong Linux\" width=\"768\" height=\"512\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Cach-dung-lenh-less-trong-Linux.png 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Cach-dung-lenh-less-trong-Linux-300x200.png 300w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ban-chat-cua-lenh-less-trong-Linux-la-gi\"><\/span>B\u1ea3n ch\u1ea5t c\u1ee7a l\u1ec7nh less trong Linux l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>V\u1ec1 c\u01a1 b\u1ea3n,\u00a0<code>less\u00a0<\/code>l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 d\u00f2ng l\u1ec7nh thi\u1ebft k\u1ebf ri\u00eang cho vi\u1ec7c <a href=\"https:\/\/interdata.vn\/blog\/pagination-la-gi\/\">ph\u00e2n trang<\/a> v\u00e0 hi\u1ec3n th\u1ecb d\u1eef li\u1ec7u v\u0103n b\u1ea3n. \u0110i\u1ec3m \u0111\u00e1ng gi\u00e1 nh\u1ea5t c\u1ee7a l\u1ec7nh n\u00e0y l\u1ed9 di\u1ec7n khi b\u1ea1n ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng t\u1ec7p log kh\u1ed5ng l\u1ed3 d\u00e0i h\u00e0ng ng\u00e0n d\u00f2ng.<\/p>\n<p>Thay v\u00ec v\u1eaft ki\u1ec7t <a href=\"https:\/\/interdata.vn\/blog\/ram-server\/\">RAM<\/a> \u0111\u1ec3 n\u1ea1p to\u00e0n b\u1ed9 t\u00e0i li\u1ec7u v\u00e0o b\u1ed9 nh\u1edb c\u00f9ng l\u00fac,\u00a0<code>less\u00a0<\/code>ch\u1ec9 tr\u00edch xu\u1ea5t \u0111\u00fang ph\u1ea7n n\u1ed9i dung v\u1eeba v\u1eb7n v\u1edbi k\u00edch th\u01b0\u1edbc m\u00e0n h\u00ecnh hi\u1ec7n t\u1ea1i. C\u01a1 ch\u1ebf n\u00e0y gi\u00fap thao t\u00e1c m\u1edf file di\u1ec5n ra ch\u1edbp nho\u00e1ng v\u00e0 t\u1ed1i \u01b0u h\u00f3a t\u00e0i nguy\u00ean <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a>.<\/p>\n<p>C\u1ea5u tr\u00fac l\u1ec7nh ti\u00eau chu\u1ea9n:<\/p>\n<p><code>less [OPTIONS]... (FILE_PATH OR FILE_NAME)<\/code><\/p>\n<p>M\u1eb9o thao t\u00e1c:<\/p>\n<p>\u0110\u1ec3 tr\u01b0\u1ee3t l\u00ean\/xu\u1ed1ng t\u1eebng d\u00f2ng v\u0103n b\u1ea3n, h\u00e3y d\u00f9ng c\u00e1c ph\u00edm m\u0169i t\u00ean. N\u1ebfu mu\u1ed1n l\u1eadt sang trang m\u1edbi, ph\u00edm SPACE l\u00e0 l\u1ef1a ch\u1ecdn d\u00e0nh cho b\u1ea1n.<\/p>\n<p>Ph\u1ea7n\u00a0<code>[OPTIONS]\u00a0<\/code>(T\u00f9y ch\u1ecdn) kh\u00f4ng mang t\u00ednh b\u1eaft bu\u1ed9c. Tuy nhi\u00ean, b\u1ea1n ho\u00e0n to\u00e0n c\u00f3 quy\u1ec1n gh\u00e9p n\u1ed1i nhi\u1ec1u t\u00f9y ch\u1ecdn l\u1ea1i v\u1edbi nhau trong c\u00f9ng m\u1ed9t c\u00e2u l\u1ec7nh \u0111\u1ec3 t\u0103ng hi\u1ec7u qu\u1ea3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"9-tham-so-mo-rong-Options-cua-lenh-less\"><\/span>9 tham s\u1ed1 m\u1edf r\u1ed9ng (Options) c\u1ee7a l\u1ec7nh less<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 xem to\u00e0n b\u1ed9 t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt c\u1ee7a c\u00f4ng c\u1ee5, b\u1ea1n g\u00f5 l\u1ec7nh:<\/p>\n<p><code>man less<\/code><\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng ph\u00e2n t\u00edch 9 <a href=\"https:\/\/interdata.vn\/blog\/tham-so-parameter-la-gi\/\">tham s\u1ed1<\/a> th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nh\u1ea5t:<\/p>\n<table style=\"width: 100%; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 15px; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 12px rgba(12,64,244,0.15);\">\n<thead>\n<tr>\n<th style=\"padding: 14px 16px; text-align: left; color: #fff; background: linear-gradient(135deg,#0C40F4,#077FFA,#0497FC); border: 1px solid #dbeafe;\">Tham s\u1ed1<\/th>\n<th style=\"padding: 14px 16px; text-align: left; color: #fff; background: linear-gradient(135deg,#0C40F4,#077FFA,#0497FC); border: 1px solid #dbeafe;\">Ch\u1ee9c n\u0103ng chi ti\u1ebft<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe; font-weight: 600; color: #0c40f4;\">-E<\/td>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe;\">T\u1ef1 \u0111\u1ed9ng tho\u00e1t kh\u1ecfi tr\u00ecnh xem khi b\u1ea1n cu\u1ed9n \u0111\u1ebfn d\u00f2ng cu\u1ed1i c\u00f9ng c\u1ee7a t\u1ec7p.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe; font-weight: 600; color: #0c40f4;\">-f<\/td>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe;\">\u00c9p h\u1ec7 th\u1ed1ng m\u1edf c\u1ea3 nh\u1eefng t\u1ec7p tin kh\u00f4ng thu\u1ed9c d\u1ea1ng v\u0103n b\u1ea3n ti\u00eau chu\u1ea9n (non-regular files).<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe; font-weight: 600; color: #0c40f4;\">-F<\/td>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe;\">L\u1eadp t\u1ee9c \u0111\u00f3ng l\u1ec7nh n\u1ebfu to\u00e0n b\u1ed9 n\u1ed9i dung t\u1ec7p tin \u0111\u1ee7 ng\u1eafn \u0111\u1ec3 hi\u1ec3n th\u1ecb g\u1ecdn trong m\u1ed9t trang m\u00e0n h\u00ecnh.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe; font-weight: 600; color: #0c40f4;\">-i<\/td>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe;\">T\u1eaft ch\u1ebf \u0111\u1ed9 ph\u00e2n bi\u1ec7t ch\u1eef hoa v\u00e0 ch\u1eef th\u01b0\u1eddng khi thao t\u00e1c.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe; font-weight: 600; color: #0c40f4;\">-n<\/td>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe;\">V\u00f4 hi\u1ec7u h\u00f3a vi\u1ec7c hi\u1ec3n th\u1ecb s\u1ed1 th\u1ee9 t\u1ef1 d\u00f2ng tr\u00ean giao di\u1ec7n.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe; font-weight: 600; color: #0c40f4;\">-N<\/td>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe;\">\u0110\u00ednh k\u00e8m s\u1ed1 th\u1ee9 t\u1ef1 v\u00e0o \u0111\u1ea7u m\u1ed7i d\u00f2ng v\u0103n b\u1ea3n.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe; font-weight: 600; color: #0c40f4;\">-p[pattern]<\/td>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe;\">B\u1ecf qua ph\u1ea7n \u0111\u1ea7u t\u00e0i li\u1ec7u v\u00e0 \u0111\u01b0a b\u1ea1n \u0111\u1ebfn th\u1eb3ng d\u00f2ng \u0111\u1ea7u ti\u00ean c\u00f3 ch\u1ee9a <a href=\"https:\/\/interdata.vn\/blog\/string-la-gi\/\">chu\u1ed7i k\u00fd t\u1ef1<\/a> (m\u1eabu) \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe; font-weight: 600; color: #0c40f4;\">-s<\/td>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe;\">N\u00e9n c\u00e1c d\u00f2ng tr\u1ed1ng li\u1ec1n k\u1ec1 nhau th\u00e0nh m\u1ed9t d\u00f2ng tr\u1ed1ng duy nh\u1ea5t.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe; font-weight: 600; color: #0c40f4;\">z[n]<\/td>\n<td style=\"padding: 12px 16px; border: 1px solid #dbeafe;\">\u0110i\u1ec1u ch\u1ec9nh s\u1ed1 l\u01b0\u1ee3ng d\u00f2ng v\u0103n b\u1ea3n s\u1ebd tr\u01b0\u1ee3t \u0111i m\u1ed7i l\u1ea7n b\u1ea1n th\u1ef1c hi\u1ec7n thao t\u00e1c cu\u1ed9n (thi\u1ebft l\u1eadp th\u00e0nh n d\u00f2ng).<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>L\u01b0u \u00fd quan tr\u1ecdng<\/strong>: <a href=\"https:\/\/interdata.vn\/blog\/cli-command-line-interface\/\">Giao di\u1ec7n d\u00f2ng l\u1ec7nh<\/a> (CLI) c\u1ee7a Linux lu\u00f4n nh\u1eadn di\u1ec7n ch\u1eef hoa v\u00e0 ch\u1eef th\u01b0\u1eddng l\u00e0 hai k\u00fd t\u1ef1 kh\u00e1c bi\u1ec7t, do \u0111\u00f3 h\u00e3y g\u00f5 ch\u00ednh x\u00e1c c\u00e1c tham s\u1ed1 tr\u00ean.<\/p>\n<div class=\"highlight-cta-box\">Vi\u1ec7c r\u00e0 so\u00e1t c\u00e1c t\u1ec7p tin log h\u1ec7 th\u1ed1ng h\u00e0ng gigabyte c\u00f3 th\u1ec3 g\u00e2y \u0111\u01a1 m\u00e1y n\u1ebfu c\u1ea5u h\u00ecnh server qu\u00e1 y\u1ebfu. N\u00e2ng c\u1ea5p ngay l\u00ean h\u1ec7 th\u1ed1ng Cloud <a href=\"https:\/\/interdata.vn\/blog\/vps-la-gi\/\">VPS<\/a> c\u1ea5u h\u00ecnh cao, 100% NVMe \u0111\u1ec3 thao t\u00e1c d\u00f2ng l\u1ec7nh m\u01b0\u1ee3t m\u00e0 kh\u00f4ng \u0111\u1ed9 tr\u1ec5.<br \/>\n<a href=\"https:\/\/interdata.vn\/thue-vps\/\" class=\"button primary is-primary is-medium\"  >\n\t\t<span>Tham kh\u1ea3o c\u00e1c g\u00f3i VPS hi\u1ec7u n\u0103ng cao<\/span>\n\t<\/a>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"10-kich-ban-thuc-te-ung-dung-lenh-less\"><\/span>10 k\u1ecbch b\u1ea3n th\u1ef1c t\u1ebf \u1ee9ng d\u1ee5ng l\u1ec7nh less<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n, ch\u00fang ta s\u1ebd \u0111i v\u00e0o c\u00e1c t\u00ecnh hu\u1ed1ng gi\u1ea3 \u0111\u1ecbnh khi l\u00e0m vi\u1ec7c v\u1edbi\u00a0less:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-1-Truy-cap-noi-dung-tep-van-ban-co-ban\"><\/span>V\u00ed d\u1ee5 1: Truy c\u1eadp n\u1ed9i dung t\u1ec7p v\u0103n b\u1ea3n c\u01a1 b\u1ea3n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 hi\u1ec3n th\u1ecb n\u1ed9i dung m\u1ed9t t\u00e0i li\u1ec7u theo \u0111\u1ecbnh d\u1ea1ng t\u1eebng trang, b\u1ea1n ch\u1ec9 c\u1ea7n g\u1ecdi l\u1ec7nh\u00a0<code>less\u00a0<\/code>\u0111i k\u00e8m \u0111\u01b0\u1eddng d\u1eabn tuy\u1ec7t \u0111\u1ed1i ho\u1eb7c t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a t\u1ec7p \u0111\u00f3. Gi\u1ea3 s\u1eed b\u1ea1n mu\u1ed1n \u0111\u1ecdc t\u1ec7p country \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ea1i th\u01b0 m\u1ee5c \/interdata\/nam, quy tr\u00ecnh s\u1ebd l\u00e0:<\/p>\n<p>M\u1edf c\u1eeda s\u1ed5 <strong><a href=\"https:\/\/interdata.vn\/blog\/ubuntu-server-la-gi\/\">Ubuntu<\/a> Terminal<\/strong>.<\/p>\n<p>Th\u1ef1c thi c\u00fa ph\u00e1p sau v\u00e0 \u1ea5n <strong>Enter<\/strong>:<\/p>\n<p><code>less country<\/code><\/p>\n<p>Ngay l\u1eadp t\u1ee9c, m\u00e0n h\u00ecnh s\u1ebd tr\u1ea3 v\u1ec1 n\u1ed9i dung c\u1ee7a t\u1ec7p\u00a0<code>country<\/code>, cho ph\u00e9p b\u1ea1n \u0111\u1ecdc theo t\u1eebng trang m\u00e0n h\u00ecnh.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-41608 size-full\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Truy-cap-noi-dung-tep-van-ban-co-ban-e1780903144619.jpg\" alt=\"Truy c\u1eadp n\u1ed9i dung t\u1ec7p v\u0103n b\u1ea3n c\u01a1 b\u1ea3n\" width=\"730\" height=\"720\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Truy-cap-noi-dung-tep-van-ban-co-ban-e1780903144619.jpg 730w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Truy-cap-noi-dung-tep-van-ban-co-ban-e1780903144619-300x296.jpg 300w\" sizes=\"auto, (max-width: 730px) 100vw, 730px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-2-Hien-thi-van-ban-kem-theo-danh-so-dong\"><\/span>V\u00ed d\u1ee5 2: Hi\u1ec3n th\u1ecb v\u0103n b\u1ea3n k\u00e8m theo \u0111\u00e1nh s\u1ed1 d\u00f2ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00f4i khi vi\u1ec7c c\u00f3 th\u00eam s\u1ed1 th\u1ee9 t\u1ef1 s\u1ebd gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng theo d\u00f5i b\u1ed1 c\u1ee5c t\u00e0i li\u1ec7u h\u01a1n. Tham s\u1ed1\u00a0<code>-N<\/code>\u00a0s\u1ebd gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n n\u00e0y:<\/p>\n<p>T\u1ea1i giao di\u1ec7n Terminal.<\/p>\n<p>B\u1ea1n h\u00e3y ch\u1ea1y c\u00e2u l\u1ec7nh:<\/p>\n<p><code>less -N country<\/code><\/p>\n<p>Sau khi <strong>Enter<\/strong>, h\u1ec7 th\u1ed1ng s\u1ebd xu\u1ea5t ra to\u00e0n b\u1ed9 v\u0103n b\u1ea3n, trong \u0111\u00f3 \u0111\u1ea7u m\u1ed7i d\u00f2ng \u0111\u1ec1u \u0111\u01b0\u1ee3c \u0111\u00e1nh s\u1ed1 th\u1ee9 t\u1ef1 r\u00f5 r\u00e0ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-41611\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Hien-thi-van-ban-kem-theo-danh-so-dong.jpg\" alt=\"Hi\u1ec3n th\u1ecb v\u0103n b\u1ea3n k\u00e8m theo \u0111\u00e1nh s\u1ed1 d\u00f2ng\" width=\"737\" height=\"432\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Hien-thi-van-ban-kem-theo-danh-so-dong.jpg 737w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Hien-thi-van-ban-kem-theo-danh-so-dong-300x176.jpg 300w\" sizes=\"auto, (max-width: 737px) 100vw, 737px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-3-Truy-vet-tu-khoa-ben-trong-tai-lieu\"><\/span><strong>V\u00ed d\u1ee5 3: Truy v\u1ebft t\u1eeb kh\u00f3a b\u00ean trong t\u00e0i li\u1ec7u<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ti\u1ec7n \u00edch less cung c\u1ea5p b\u1ed9 m\u00e1y t\u00ecm ki\u1ebfm c\u1ee5c b\u1ed9 r\u1ea5t m\u1ea1nh m\u1ebd. B\u1ea1n g\u00f5 \/PATTERN n\u1ebfu mu\u1ed1n t\u00ecm xu\u00f4i v\u1ec1 cu\u1ed1i trang, ho\u1eb7c g\u00f5 ?PATTERN \u0111\u1ec3 t\u00ecm ng\u01b0\u1ee3c l\u00ean tr\u00ean. Khu v\u1ef1c nh\u1eadp li\u1ec7u s\u1ebd hi\u1ec3n th\u1ecb \u1edf g\u00f3c d\u01b0\u1edbi c\u00f9ng m\u00e0n h\u00ecnh.<\/p>\n<p>(M\u1eb7c \u0111\u1ecbnh vi\u1ec7c t\u00ecm ki\u1ebfm s\u1ebd b\u1eaft l\u1ed7i ch\u1eef hoa\/ch\u1eef th\u01b0\u1eddng. \u0110\u1ec3 b\u1ecf qua r\u00e0o c\u1ea3n n\u00e0y, h\u00e3y ch\u00e8n tham s\u1ed1 -I <i>v\u00e0o c\u00e2u l\u1ec7nh ho\u1eb7c b\u1ea5m ph\u00edm<strong> I<\/strong> khi<\/i><i>\u00a0\u0111ang \u1edf trong ch\u1ebf \u0111\u1ed9 \u0111\u1ecdc).<\/i><\/p>\n<ul>\n<li>B\u1eadt Terminal c\u1ee7a Ubuntu.<\/li>\n<li>G\u00f5 l\u1ec7nh sau r\u1ed3i <strong>Enter<\/strong>:<\/li>\n<\/ul>\n<pre><code class=\"language-plaintext\">less -I country<\/code><\/pre>\n<ul>\n<li>Quan s\u00e1t d\u01b0\u1edbi \u0111\u00e1y m\u00e0n h\u00ecnh, thanh t\u00ecm ki\u1ebfm \u0111\u00e3 xu\u1ea5t hi\u1ec7n.<\/li>\n<li>Ti\u1ebfn h\u00e0nh nh\u1eadp t\u1eeb kh\u00f3a b\u1ea1n c\u1ea7n d\u00f2 t\u00ecm (v\u00ed d\u1ee5:\u00a0Zambia).<\/li>\n<li>Nh\u1ea5n <strong>Enter<\/strong> \u0111\u1ec3 h\u1ec7 th\u1ed1ng b\u00f4i s\u00e1ng v\u1ecb tr\u00ed c\u1ee7a t\u1eeb kh\u00f3a trong v\u0103n b\u1ea3n.<\/li>\n<\/ul>\n<h3><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-41613\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Truy-vet-tu-khoa-ben-trong-tai-lieu.png\" alt=\"Truy v\u1ebft t\u1eeb kh\u00f3a b\u00ean trong t\u00e0i li\u1ec7u\" width=\"810\" height=\"540\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Truy-vet-tu-khoa-ben-trong-tai-lieu.png 810w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Truy-vet-tu-khoa-ben-trong-tai-lieu-300x200.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Truy-vet-tu-khoa-ben-trong-tai-lieu-768x512.png 768w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/h3>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-4-Khoi-chay-file-tu-vi-tri-chua-tu-khoa\"><\/span><strong>V\u00ed d\u1ee5 4: Kh\u1edfi ch\u1ea1y file t\u1eeb v\u1ecb tr\u00ed ch\u1ee9a t\u1eeb kh\u00f3a<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Thay v\u00ec m\u1edf file t\u1eeb d\u00f2ng s\u1ed1 1, b\u1ea1n c\u00f3 th\u1ec3 \u00e9p l\u1ec7nh less nh\u1ea3y th\u1eb3ng \u0111\u1ebfn d\u00f2ng ch\u1ee9a d\u1eef li\u1ec7u b\u1ea1n quan t\u00e2m b\u1eb1ng c\u1edd -p.<\/p>\n<p>Kh\u1edfi ch\u1ea1y Terminal v\u00e0 nh\u1eadp chu\u1ea9n x\u00e1c c\u1ea5u tr\u00fac sau:<\/p>\n<pre><code class=\"language-plaintext\">less -p country<\/code><\/pre>\n<p>B\u1ea5m <strong>Enter<\/strong>. Gi\u1ea3 s\u1eed t\u1ec7p tin c\u00f3 ch\u1ee9a chu\u1ed7i k\u00fd t\u1ef1\u00a0Togo, h\u1ec7 th\u1ed1ng s\u1ebd l\u1eadp t\u1ee9c \u0111\u1ecbnh v\u1ecb v\u00e0 hi\u1ec3n th\u1ecb v\u0103n b\u1ea3n b\u1eaft \u0111\u1ea7u ngay t\u1eeb d\u00f2ng \u0111\u1ea7u ti\u00ean c\u00f3 ch\u1ee9a chu\u1ed7i n\u00e0y.<\/p>\n<p>(\u0110\u1eebng qu\u00ean: T\u00ednh n\u0103ng n\u00e0y tu\u00e2n th\u1ee7 quy t\u1eafc ph\u00e2n bi\u1ec7t ch\u1eef hoa\/th\u01b0\u1eddng).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-5-Loc-bo-cac-khoang-trang-thua\"><\/span><strong>V\u00ed d\u1ee5 5: L\u1ecdc b\u1ecf c\u00e1c kho\u1ea3ng tr\u1eafng th\u1eeba<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n tr\u00ecnh b\u00e0y qu\u00e1 d\u00e0n tr\u1ea3i v\u1edbi v\u00f4 s\u1ed1 d\u00f2ng tr\u1ed1ng n\u1eb1m xen k\u1ebd c\u00e1c \u0111o\u1ea1n v\u0103n, h\u00e3y d\u00f9ng t\u00f9y ch\u1ecdn -s \u0111\u1ec3 d\u1ecdn d\u1eb9p ch\u00fang.<\/p>\n<ul>\n<li>Truy c\u1eadp Terminal.<\/li>\n<li>\u0110\u1ea9y c\u00e2u l\u1ec7nh sau v\u00e0o h\u1ec7 th\u1ed1ng:<\/li>\n<\/ul>\n<pre><code class=\"language-plaintext\">less -s country<\/code><\/pre>\n<p>K\u1ebft qu\u1ea3 l\u00e0 to\u00e0n b\u1ed9 c\u00e1c d\u00f2ng r\u1ed7ng v\u00f4 ngh\u0129a \u0111\u00e3 \u0111\u01b0\u1ee3c g\u1ed9p l\u1ea1i, tr\u1ea3 l\u1ea1i m\u1ed9t giao di\u1ec7n \u0111\u1ecdc g\u1ecdn g\u00e0ng v\u00e0 li\u1ec1n m\u1ea1ch h\u01a1n r\u1ea5t nhi\u1ec1u.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-41614\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Loc-bo-cac-khoang-trang-thua.png\" alt=\"L\u1ecdc b\u1ecf c\u00e1c kho\u1ea3ng tr\u1eafng th\u1eeba\" width=\"810\" height=\"540\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Loc-bo-cac-khoang-trang-thua.png 810w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Loc-bo-cac-khoang-trang-thua-300x200.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Loc-bo-cac-khoang-trang-thua-768x512.png 768w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-6-Doc-song-song-nhieu-tep-tin\"><\/span>V\u00ed d\u1ee5 6: \u0110\u1ecdc song song nhi\u1ec1u t\u1ec7p tin<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 truy\u1ec1n nhi\u1ec1u t\u00ean file v\u00e0o l\u1ec7nh\u00a0less\u00a0\u0111\u1ec3 x\u1eed l\u00fd ch\u00fang trong c\u00f9ng m\u1ed9t phi\u00ean l\u00e0m vi\u1ec7c.<\/p>\n<ul>\n<li>M\u1edf c\u1eeda s\u1ed5 Terminal.<\/li>\n<li>Th\u1ef1c hi\u1ec7n c\u00e2u l\u1ec7nh gh\u00e9p:<\/li>\n<\/ul>\n<p><code>less city country<\/code><\/p>\n<p>L\u00fac n\u00e0y, h\u1ec7 th\u1ed1ng \u0111\u00e3 n\u1ea1p c\u1ea3 hai file. \u0110\u1ec3 chuy\u1ec3n sang \u0111\u1ecdc t\u1ec7p ti\u1ebfp theo, b\u1ea1n b\u1ea5m t\u1ed5 h\u1ee3p\u00a0(SHIFT+;) &amp; N. N\u1ebfu mu\u1ed1n l\u00f9i l\u1ea1i t\u1ec7p v\u1eeba xem tr\u01b0\u1edbc \u0111\u00f3, h\u00e3y d\u00f9ng ph\u00edm\u00a0: &amp; P.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-41605\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Doc-song-song-nhieu-tep-tin.webp\" alt=\"\u0110\u1ecdc song song nhi\u1ec1u t\u1ec7p tin\" width=\"958\" height=\"711\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Doc-song-song-nhieu-tep-tin.webp 958w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Doc-song-song-nhieu-tep-tin-300x223.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Doc-song-song-nhieu-tep-tin-768x570.webp 768w\" sizes=\"auto, (max-width: 958px) 100vw, 958px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-7-Danh-dau-Bookmark-doan-van-ban\"><\/span>V\u00ed d\u1ee5 7: \u0110\u00e1nh d\u1ea5u (Bookmark) \u0111o\u1ea1n v\u0103n b\u1ea3n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u00ednh n\u0103ng g\u00e1n c\u1edd (flag) gi\u00fap b\u1ea1n l\u01b0u l\u1ea1i c\u00e1c m\u1ed1c quan tr\u1ecdng trong t\u00e0i li\u1ec7u c\u1ef1c d\u00e0i v\u00e0 quay l\u1ea1i \u0111\u00f3 trong v\u00f2ng m\u1ed9t n\u1ed1t nh\u1ea1c.<\/p>\n<ul>\n<li>M\u1edf giao di\u1ec7n Terminal.<\/li>\n<li>G\u1ecdi t\u1ec7p tin ra b\u1eb1ng l\u1ec7nh:<\/li>\n<\/ul>\n<p><code>less file.txt<\/code><\/p>\n<p>B\u1ea5m Enter. Khi l\u01b0\u1edbt \u0111\u1ebfn \u0111o\u1ea1n c\u1ea7n l\u01b0u, h\u00e3y \u1ea5n ph\u00edm\u00a0M\u00a0k\u1ebft h\u1ee3p v\u1edbi m\u1ed9t ch\u1eef c\u00e1i b\u1ea5t k\u1ef3 (\u0111\u1ec3 l\u00e0m t\u00ean bookmark). B\u1ea1n c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i thao t\u00e1c n\u00e0y v\u1edbi nhi\u1ec1u ch\u1eef c\u00e1i kh\u00e1c nhau \u0111\u1ec3 t\u1ea1o nhi\u1ec1u \u0111i\u1ec3m neo.<\/p>\n<p>B\u1ea5t c\u1ee9 khi n\u00e0o mu\u1ed1n d\u1ecbch chuy\u1ec3n nhanh v\u1ec1 \u0111i\u1ec3m \u0111\u00e3 l\u01b0u, b\u1ea1n ch\u1ec9 vi\u1ec7c g\u00f5 ph\u00edm\u00a0&#8216;\u00a0(d\u1ea5u nh\u00e1y \u0111\u01a1n) k\u00e8m theo c\u00e1i ch\u1eef c\u00e1i m\u00e0 b\u1ea1n \u0111\u00e3 g\u00e1n tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-8-Giam-sat-luong-du-lieu-theo-thoi-gian-thuc-Real-time\"><\/span>V\u00ed d\u1ee5 8: Gi\u00e1m s\u00e1t lu\u1ed3ng d\u1eef li\u1ec7u theo th\u1eddi gian th\u1ef1c (Real-time)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>K\u1ecbch b\u1ea3n n\u00e0y c\u1ef1c k\u1ef3 h\u1eefu d\u1ee5ng \u0111\u1ec3 theo d\u00f5i c\u00e1c file log (nh\u1eadt k\u00fd h\u1ec7 th\u1ed1ng). C\u1edd\u00a0+F\u00a0s\u1ebd kh\u00f3a m\u00e0n h\u00ecnh \u1edf ph\u1ea7n cu\u1ed1i c\u1ee7a t\u1ec7p v\u00e0 li\u00ean t\u1ee5c c\u1eadp nh\u1eadt khi c\u00f3 d\u00f2ng ch\u1eef m\u1edbi \u0111\u01b0\u1ee3c ghi v\u00e0o.<\/p>\n<ul>\n<li>T\u1ea1i m\u00e0n h\u00ecnh Terminal.<\/li>\n<li>Ch\u1ea1y c\u00fa ph\u00e1p sau:<\/li>\n<\/ul>\n<p><code>less +F country<\/code><\/p>\n<p>B\u1ea5m Enter. D\u01b0\u1edbi \u0111\u00e1y giao di\u1ec7n s\u1ebd hi\u1ec7n th\u00f4ng b\u00e1o cho bi\u1ebft c\u00f4ng c\u1ee5 \u0111ang trong tr\u1ea1ng th\u00e1i ch\u1edd. C\u1ee9 c\u00f3 d\u1eef li\u1ec7u m\u1edbi sinh ra, m\u00e0n h\u00ecnh s\u1ebd t\u1ef1 \u0111\u1ed9ng tr\u01b0\u1ee3t xu\u1ed1ng.<\/p>\n<p>(Ghi ch\u00fa: \u0110\u1ec3 tho\u00e1t ch\u1ebf \u0111\u1ed9 theo d\u00f5i tr\u1ef1c ti\u1ebfp n\u00e0y, h\u00e3y d\u00f9ng t\u1ed5 h\u1ee3p\u00a0Ctrl + C. L\u01b0u \u00fd th\u00eam, khi \u0111ang gi\u00e1m s\u00e1t real-time, b\u1ea1n kh\u00f4ng th\u1ec3 cu\u1ed9n trang hay s\u1eed d\u1ee5ng ch\u1ee9c n\u0103ng t\u00ecm ki\u1ebfm).<\/p>\n<div class=\"highlight-cta-box\">\n<p>\u0110\u00e3 n\u1eafm v\u1eefng k\u1ef9 n\u0103ng Linux, gi\u1edd l\u00e0 l\u00fac b\u1ea1n c\u1ea7n m\u1ed9t m\u00f4i tr\u01b0\u1eddng th\u1ef1c chi\u1ebfn! \u0110\u0103ng k\u00fd ngay d\u1ecbch v\u1ee5 VPS t\u1ed1c \u0111\u1ed9 cao v\u1edbi Full <a href=\"https:\/\/interdata.vn\/blog\/root-access-la-gi\/\">quy\u1ec1n Root<\/a> \u0111\u1ec3 t\u1ef1 do tri\u1ec3n khai \u1ee9ng d\u1ee5ng, qu\u1ea3n tr\u1ecb file v\u00e0 c\u1ea5u h\u00ecnh h\u1ec7 th\u1ed1ng theo c\u00e1ch c\u1ee7a ri\u00eang b\u1ea1n.<\/p>\n<div><a href=\"https:\/\/interdata.vn\/vps-linux\/\" class=\"button primary is-primary is-medium\"  >\n\t\t<span>D\u00f9ng th\u1eed c\u00e1c g\u00f3i VPS Linux t\u1ea1i InterData<\/span>\n\t<\/a>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-9-Day-luong-du-lieu-sang-lenh-less-Pipe\"><\/span>V\u00ed d\u1ee5 9: \u0110\u1ea9y lu\u1ed3ng d\u1eef li\u1ec7u sang l\u1ec7nh less (Pipe)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ea1n c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i \u0111\u1ea7u ra c\u1ee7a m\u1ed9t l\u1ec7nh h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p v\u00e0o l\u1ec7nh\u00a0less\u00a0th\u00f4ng qua to\u00e1n t\u1eed \u0111\u01b0\u1eddng \u1ed1ng\u00a0|\u00a0nh\u1eb1m d\u1ec5 \u0111\u1ecdc k\u1ebft qu\u1ea3 h\u01a1n.<\/p>\n<p>M\u1edf Ubuntu Terminal.<\/p>\n<p>Ch\u1ea1y d\u00f2ng l\u1ec7nh ph\u1ed1i h\u1ee3p sau:<\/p>\n<p><code>sudo dmesg | less<\/code><\/p>\n<p>(L\u01b0u \u00fd:\u00a0sudo\u00a0l\u00e0 ti\u1ec1n t\u1ed1 c\u1ea5p quy\u1ec1n qu\u1ea3n tr\u1ecb t\u1ed1i cao &#8211; superusers).<\/p>\n<p>\u1ea4n Enter. Thay v\u00ec l\u1ec7nh\u00a0dmesg\u00a0x\u1ea3 h\u00e0ng ngh\u00ecn d\u00f2ng log ph\u1ea7n c\u1ee9ng tr\u00f4i tu\u1ed9t \u0111i tr\u00ean m\u00e0n h\u00ecnh, lu\u1ed3ng d\u1eef li\u1ec7u n\u00e0y s\u1ebd b\u1ecb ch\u1eb7n l\u1ea1i v\u00e0 hi\u1ec3n th\u1ecb g\u1ecdn g\u00e0ng, c\u00f3 t\u1ed5 ch\u1ee9c nh\u1edd s\u1ef1 can thi\u1ec7p c\u1ee7a\u00a0less.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-41606\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Output-duoc-tao-ra-boi-lenh-dmesg-1024x463.webp\" alt=\"Output \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi l\u1ec7nh dmesg\" width=\"1020\" height=\"461\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Output-duoc-tao-ra-boi-lenh-dmesg-1024x463.webp 1024w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Output-duoc-tao-ra-boi-lenh-dmesg-300x136.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Output-duoc-tao-ra-boi-lenh-dmesg-768x347.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Output-duoc-tao-ra-boi-lenh-dmesg.webp 1349w\" sizes=\"auto, (max-width: 1020px) 100vw, 1020px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-10-Chuyen-sang-trinh-soan-thao-ngay-trong-lenh-less\"><\/span>V\u00ed d\u1ee5 10: Chuy\u1ec3n sang tr\u00ecnh so\u1ea1n th\u1ea3o ngay trong l\u1ec7nh less<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong l\u00fac \u0111ang \u0111\u1ecdc t\u00e0i li\u1ec7u, n\u1ebfu ph\u00e1t hi\u1ec7n \u0111i\u1ec3m c\u1ea7n s\u1eeda, b\u1ea1n ch\u1ec9 c\u1ea7n b\u1ea5m ph\u00edm\u00a0V. H\u1ec7 th\u1ed1ng s\u1ebd t\u1ef1 \u0111\u1ed9ng g\u1ecdi tr\u00ecnh so\u1ea1n th\u1ea3o m\u1eb7c \u0111\u1ecbnh (v\u00ed d\u1ee5 nh\u01b0 nano tr\u00ean Ubuntu). Khi b\u1ea1n l\u01b0u v\u00e0 tho\u00e1t nano, m\u00e0n h\u00ecnh s\u1ebd t\u1ef1 \u0111\u1ed9ng quay v\u1ec1 ch\u1ebf \u0111\u1ed9 \u0111\u1ecdc c\u1ee7a\u00a0less.<\/p>\n<p>V\u00e0o m\u00f4i tr\u01b0\u1eddng Terminal.<\/p>\n<p>Kh\u1edfi ch\u1ea1y ch\u1ebf \u0111\u1ed9 xem b\u1eb1ng l\u1ec7nh:<\/p>\n<p><code>less city<\/code><\/p>\n<p>B\u1ea5m ph\u00edm\u00a0V. T\u1ec7p tin\u00a0city\u00a0ngay l\u1eadp t\u1ee9c \u0111\u01b0\u1ee3c m\u1edf b\u1eb1ng tr\u00ecnh so\u1ea1n th\u1ea3o\u00a0nano, trao cho b\u1ea1n to\u00e0n quy\u1ec1n ch\u1ec9nh s\u1eeda v\u0103n b\u1ea3n.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-41607\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Chuyen-sang-trinh-soan-thao-ngay-trong-lenh-less-1024x531.webp\" alt=\"Chuy\u1ec3n sang tr\u00ecnh so\u1ea1n th\u1ea3o ngay trong l\u1ec7nh less\" width=\"1020\" height=\"529\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Chuyen-sang-trinh-soan-thao-ngay-trong-lenh-less-1024x531.webp 1024w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Chuyen-sang-trinh-soan-thao-ngay-trong-lenh-less-300x155.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Chuyen-sang-trinh-soan-thao-ngay-trong-lenh-less-768x398.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Chuyen-sang-trinh-soan-thao-ngay-trong-lenh-less.webp 1204w\" sizes=\"auto, (max-width: 1020px) 100vw, 1020px\" \/><\/p>\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 t\u1ed5ng h\u1ee3p c\u00e1c tham s\u1ed1 v\u00e0 k\u1ecbch b\u1ea3n th\u1ef1c ti\u1ec5n v\u1ec1 c\u00f4ng c\u1ee5 less tr\u00ean n\u1ec1n t\u1ea3ng Linux. Hy v\u1ecdng r\u1eb1ng ti\u1ec7n \u00edch n\u00e0y s\u1ebd tr\u1edf th\u00e0nh tr\u1ee3 th\u1ee7 \u0111\u1eafc l\u1ef1c gi\u00fap b\u1ea1n r\u00e0 so\u00e1t, tra c\u1ee9u v\u00e0 x\u1eed l\u00fd c\u00e1c t\u1ec7p <a href=\"https:\/\/interdata.vn\/blog\/big-data-la-gi\/\">d\u1eef li\u1ec7u l\u1edbn<\/a> m\u1ed9t c\u00e1ch nh\u1eb9 nh\u00e0ng nh\u1ea5t. H\u00e3y ti\u1ebfp t\u1ee5c \u0111\u1ed3ng h\u00e0nh c\u00f9ng InterData trong c\u00e1c b\u00e0i vi\u1ebft s\u1eafp t\u1edbi \u0111\u1ec3 l\u00e0m ch\u1ee7 th\u00eam nhi\u1ec1u b\u00ed k\u00edp t\u1ed1i \u01b0u h\u1ec7 th\u1ed1ng Linux!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Khi thao t\u00e1c tr\u00ean h\u1ec7 th\u1ed1ng Linux,\u00a0less\u00a0\u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn nh\u01b0 m\u1ed9t ti\u1ec7n \u00edch kh\u00f4ng th\u1ec3 thi\u1ebfu gi\u00fap qu\u1ea3n tr\u1ecb vi\u00ean xem tr\u01b0\u1edbc n\u1ed9i dung c\u00e1c t\u1ec7p tin m\u1ed9t c\u00e1ch c\u1ef1c k\u1ef3 thu\u1eadn ti\u1ec7n. D\u00f9 v\u1eady, s\u1ee9c m\u1ea1nh c\u1ee7a c\u00f4ng c\u1ee5 n\u00e0y kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf vi\u1ec7c &#8220;\u0111\u1ecdc file&#8221;. H\u00e3y c\u00f9ng kh\u00e1m ph\u00e1 chi ti\u1ebft<\/p>\n","protected":false},"author":11,"featured_media":41615,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[161],"tags":[],"class_list":["post-41603","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-huong-dan-chung"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/41603","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=41603"}],"version-history":[{"count":2,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/41603\/revisions"}],"predecessor-version":[{"id":41617,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/41603\/revisions\/41617"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/41615"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=41603"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=41603"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=41603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}