{"id":1277,"date":"2025-04-12T14:25:52","date_gmt":"2025-04-12T14:25:52","guid":{"rendered":"https:\/\/linuxjk.cn\/?p=1277"},"modified":"2025-04-12T14:28:45","modified_gmt":"2025-04-12T14:28:45","slug":"shell_attention","status":"publish","type":"post","link":"https:\/\/linuxjk.cn\/?p=1277","title":{"rendered":"shell\u811a\u672c\u4e2d\u9519\u8bef\u8f93\u51fa\u7684\u6ce8\u610f\u4e8b\u9879"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1277\" class=\"elementor elementor-1277\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a1e2488 e-flex e-con-boxed e-con e-parent\" data-id=\"a1e2488\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-81db127 elementor-widget elementor-widget-text-editor\" data-id=\"81db127\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>\u00a0 \u5728Shell\u811a\u672c\u4e2d\uff0c<code>&gt;&amp;2<\/code>\u00a0\u662f\u4e00\u4e2a\u00a0<strong>\u8f93\u51fa\u91cd\u5b9a\u5411\u64cd\u4f5c\u7b26<\/strong>\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u5c06\u547d\u4ee4\u7684\u8f93\u51fa\u53d1\u9001\u5230\u00a0<strong>\u6807\u51c6\u9519\u8bef\u6d41\uff08stderr\uff09<\/strong>\u00a0\u800c\u4e0d\u662f\u9ed8\u8ba4\u7684\u00a0<strong>\u6807\u51c6\u8f93\u51fa\u6d41\uff08stdout\uff09<\/strong>\u3002\u867d\u7136\u5728\u4e0d\u52a0\u00a0<code>&gt;&amp;2<\/code>\u00a0\u65f6\u9519\u8bef\u4fe1\u606f\u4ecd\u4f1a\u663e\u793a\u5728\u7ec8\u7aef\u4e0a\uff0c\u4f46\u4e8c\u8005\u7684\u672c\u8d28\u533a\u522b\u5728\u4e8e\u00a0<strong>\u8f93\u51fa\u6d41\u7684\u7c7b\u578b<\/strong>\uff0c\u8fd9\u5728\u4ee5\u4e0b\u573a\u666f\u4e2d\u975e\u5e38\u91cd\u8981\uff1a<\/p><hr \/><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#1_%3E_2_%E7%9A%84%E4%BD%9C%E7%94%A8\" >1.\u00a0&gt;&amp;2\u00a0\u7684\u4f5c\u7528<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#%E8%AF%AD%E6%B3%95%E8%A7%A3%E6%9E%90\" >\u8bed\u6cd5\u89e3\u6790<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#%E9%BB%98%E8%AE%A4%E8%A1%8C%E4%B8%BA%E5%AF%B9%E6%AF%94\" >\u9ed8\u8ba4\u884c\u4e3a\u5bf9\u6bd4<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#2_%E4%B8%BA%E4%BB%80%E4%B9%88%E2%80%9C%E4%B8%8D%E5%8A%A0%E4%B9%9F%E4%B8%8D%E5%BD%B1%E5%93%8D%E8%BE%93%E5%87%BA%E2%80%9D%EF%BC%9F\" >2.\u00a0\u4e3a\u4ec0\u4e48\u201c\u4e0d\u52a0\u4e5f\u4e0d\u5f71\u54cd\u8f93\u51fa\u201d\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#3_%E5%BF%85%E9%A1%BB%E4%BD%BF%E7%94%A8_%3E_2_%E7%9A%84%E5%9C%BA%E6%99%AF\" >3.\u00a0\u5fc5\u987b\u4f7f\u7528\u00a0&gt;&amp;2\u00a0\u7684\u573a\u666f<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#%E5%9C%BA%E6%99%AF1%EF%BC%9A%E5%88%86%E7%A6%BB%E6%AD%A3%E5%B8%B8%E8%BE%93%E5%87%BA%E5%92%8C%E9%94%99%E8%AF%AF%E4%BF%A1%E6%81%AF\" >\u573a\u666f1\uff1a\u5206\u79bb\u6b63\u5e38\u8f93\u51fa\u548c\u9519\u8bef\u4fe1\u606f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#%E5%9C%BA%E6%99%AF2%EF%BC%9A%E7%AE%A1%E9%81%93%E5%A4%84%E7%90%86\" >\u573a\u666f2\uff1a\u7ba1\u9053\u5904\u7406<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#%E5%9C%BA%E6%99%AF3%EF%BC%9A%E8%AE%B0%E5%BD%95%E9%94%99%E8%AF%AF%E6%97%A5%E5%BF%97\" >\u573a\u666f3\uff1a\u8bb0\u5f55\u9519\u8bef\u65e5\u5fd7<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#4_%E4%B8%8D%E5%8A%A0_%3E_2_%E7%9A%84%E9%A3%8E%E9%99%A9\" >4.\u00a0\u4e0d\u52a0\u00a0&gt;&amp;2\u00a0\u7684\u98ce\u9669<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#5_%E7%A4%BA%E4%BE%8B%E9%AA%8C%E8%AF%81\" >5.\u00a0\u793a\u4f8b\u9a8c\u8bc1<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#%E8%84%9A%E6%9C%AC%E5%86%85%E5%AE%B9_testsh\" >\u811a\u672c\u5185\u5bb9 (test.sh)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#%E8%BF%90%E8%A1%8C%E5%B9%B6%E9%87%8D%E5%AE%9A%E5%90%91\" >\u8fd0\u884c\u5e76\u91cd\u5b9a\u5411<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#6_%E6%9C%80%E4%BD%B3%E5%AE%9E%E8%B7%B5\" >6.\u00a0\u6700\u4f73\u5b9e\u8df5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/linuxjk.cn\/?p=1277\/#%E6%80%BB%E7%BB%93\" >\u603b\u7ed3<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"1_%3E_2_%E7%9A%84%E4%BD%9C%E7%94%A8\"><\/span>1.\u00a0<strong><code>&gt;&amp;2<\/code>\u00a0\u7684\u4f5c\u7528<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3><h4><span class=\"ez-toc-section\" id=\"%E8%AF%AD%E6%B3%95%E8%A7%A3%E6%9E%90\"><\/span>\u8bed\u6cd5\u89e3\u6790<span class=\"ez-toc-section-end\"><\/span><\/h4><ul><li><p><code>&gt;<\/code>\uff1a\u91cd\u5b9a\u5411\u7b26\u53f7\u3002<\/p><\/li><li><p><code>&amp;2<\/code>\uff1a\u8868\u793a\u6587\u4ef6\u63cf\u8ff0\u7b262\uff08\u5373\u6807\u51c6\u9519\u8bef\u6d41\uff09\u3002<\/p><\/li><li><p><strong><code>&gt;&amp;2<\/code><\/strong>\uff1a\u5c06\u547d\u4ee4\u7684\u8f93\u51fa\u91cd\u5b9a\u5411\u5230\u6807\u51c6\u9519\u8bef\u6d41\u3002<\/p><\/li><\/ul><h4><span class=\"ez-toc-section\" id=\"%E9%BB%98%E8%AE%A4%E8%A1%8C%E4%B8%BA%E5%AF%B9%E6%AF%94\"><\/span>\u9ed8\u8ba4\u884c\u4e3a\u5bf9\u6bd4<span class=\"ez-toc-section-end\"><\/span><\/h4><table><thead><tr><th>\u547d\u4ee4<\/th><th>\u8f93\u51fa\u6d41<\/th><th>\u7ec8\u7aef\u663e\u793a\u6548\u679c<\/th><th>\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td><code>echo \"\u9519\u8bef\u4fe1\u606f\"<\/code><\/td><td>stdout<\/td><td>\u6b63\u5e38\u663e\u793a<\/td><td>\u666e\u901a\u8f93\u51fa<\/td><\/tr><tr><td><code>echo \"\u9519\u8bef\u4fe1\u606f\" &gt;&amp;2<\/code><\/td><td>stderr<\/td><td>\u6b63\u5e38\u663e\u793a<\/td><td>\u9519\u8bef\u6d88\u606f\u3001\u8b66\u544a\u3001\u8c03\u8bd5\u4fe1\u606f<\/td><\/tr><\/tbody><\/table><hr \/><h3><span class=\"ez-toc-section\" id=\"2_%E4%B8%BA%E4%BB%80%E4%B9%88%E2%80%9C%E4%B8%8D%E5%8A%A0%E4%B9%9F%E4%B8%8D%E5%BD%B1%E5%93%8D%E8%BE%93%E5%87%BA%E2%80%9D%EF%BC%9F\"><\/span>2.\u00a0<strong>\u4e3a\u4ec0\u4e48\u201c\u4e0d\u52a0\u4e5f\u4e0d\u5f71\u54cd\u8f93\u51fa\u201d\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3><p>\u5728\u00a0<strong>\u76f4\u63a5\u8fd0\u884c\u811a\u672c\u4e14\u672a\u91cd\u5b9a\u5411\u8f93\u51fa<\/strong> \u65f6\uff0cstdout \u548c stderr \u9ed8\u8ba4\u90fd\u4f1a\u8f93\u51fa\u5230\u7ec8\u7aef\uff0c\u56e0\u6b64\u8089\u773c\u770b\u8d77\u6765\u6548\u679c\u76f8\u540c\uff1a<\/p><div class=\"md-code-block md-code-block-dark\"><pre><span class=\"token comment\"># \u4e24\u79cd\u5199\u6cd5\u5728\u7ec8\u7aef\u4e0a\u90fd\u4f1a\u663e\u793a\u9519\u8bef\u4fe1\u606f<\/span>\n<span class=\"token builtin class-name\">echo<\/span> <span class=\"token string\">\"\u9519\u8bef\uff1a\u672a\u63d0\u4f9b\u4efb\u4f55\u7528\u6237\u540d\u3002\"<\/span>\n<span class=\"token builtin class-name\">echo<\/span> <span class=\"token string\">\"\u9519\u8bef\uff1a\u672a\u63d0\u4f9b\u4efb\u4f55\u7528\u6237\u540d\u3002\"<\/span> <span class=\"token operator\">&gt;<\/span><span class=\"token file-descriptor important\">&amp;2<\/span><\/pre><\/div><p>\u4f46\u5b83\u4eec\u7684\u00a0<strong>\u672c\u8d28\u533a\u522b<\/strong>\u00a0\u5728\u4e8e\uff1a<\/p><ul><li><p><strong>stdout<\/strong>\uff1a\u7528\u4e8e\u6b63\u5e38\u7a0b\u5e8f\u8f93\u51fa\uff08\u5982\u7ed3\u679c\u3001\u72b6\u6001\u4fe1\u606f\uff09\u3002<\/p><\/li><li><p><strong>stderr<\/strong>\uff1a\u7528\u4e8e\u9519\u8bef\u3001\u8b66\u544a\u3001\u8c03\u8bd5\u4fe1\u606f\u7b49\u975e\u9884\u671f\u8f93\u51fa\u3002<\/p><\/li><\/ul><hr \/><h3><span class=\"ez-toc-section\" id=\"3_%E5%BF%85%E9%A1%BB%E4%BD%BF%E7%94%A8_%3E_2_%E7%9A%84%E5%9C%BA%E6%99%AF\"><\/span>3.\u00a0<strong>\u5fc5\u987b\u4f7f\u7528\u00a0<code>&gt;&amp;2<\/code>\u00a0\u7684\u573a\u666f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3><h4><span class=\"ez-toc-section\" id=\"%E5%9C%BA%E6%99%AF1%EF%BC%9A%E5%88%86%E7%A6%BB%E6%AD%A3%E5%B8%B8%E8%BE%93%E5%87%BA%E5%92%8C%E9%94%99%E8%AF%AF%E4%BF%A1%E6%81%AF\"><\/span>\u573a\u666f1\uff1a\u5206\u79bb\u6b63\u5e38\u8f93\u51fa\u548c\u9519\u8bef\u4fe1\u606f<span class=\"ez-toc-section-end\"><\/span><\/h4><p>\u5f53\u811a\u672c\u7684\u8f93\u51fa\u88ab\u91cd\u5b9a\u5411\u5230\u6587\u4ef6\u65f6\uff0c\u53ea\u6709 stdout \u4f1a\u88ab\u5199\u5165\u6587\u4ef6\uff0c\u800c stderr \u4ecd\u4f1a\u663e\u793a\u5728\u7ec8\u7aef\uff1a<\/p><div class=\"md-code-block md-code-block-dark\"><pre><span class=\"token comment\"># \u5199\u5165\u5230 output.log \u7684\u53ea\u6709 stdout\uff0cstderr \u4ecd\u5728\u7ec8\u7aef\u663e\u793a<\/span>\n.\/script.sh <span class=\"token operator\">&gt;<\/span> output.log\n\n<span class=\"token comment\"># \u5982\u679c\u9519\u8bef\u4fe1\u606f\u7528 &gt;&amp;2 \u8f93\u51fa\uff1a<\/span>\n<span class=\"token comment\"># - \u6b63\u5e38\u7ed3\u679c\u5199\u5165 output.log<\/span>\n<span class=\"token comment\"># - \u9519\u8bef\u63d0\u793a\u663e\u793a\u5728\u7ec8\u7aef<\/span><\/pre><\/div><h4><span class=\"ez-toc-section\" id=\"%E5%9C%BA%E6%99%AF2%EF%BC%9A%E7%AE%A1%E9%81%93%E5%A4%84%E7%90%86\"><\/span>\u573a\u666f2\uff1a\u7ba1\u9053\u5904\u7406<span class=\"ez-toc-section-end\"><\/span><\/h4><p>\u901a\u8fc7\u7ba1\u9053\uff08<code>|<\/code>\uff09\u4f20\u9012 stdout \u65f6\uff0cstderr \u4e0d\u4f1a\u88ab\u5904\u7406\uff1a<\/p><div class=\"md-code-block md-code-block-dark\"><pre><span class=\"token comment\"># \u53ea\u6709 stdout \u4f1a\u4f20\u9012\u7ed9 grep\uff0cstderr \u4ecd\u663e\u793a\u5728\u7ec8\u7aef<\/span>\n.\/script.sh <span class=\"token operator\">|<\/span> <span class=\"token function\">grep<\/span> <span class=\"token string\">\"\u5173\u952e\u5b57\"<\/span><\/pre><\/div><h4><span class=\"ez-toc-section\" id=\"%E5%9C%BA%E6%99%AF3%EF%BC%9A%E8%AE%B0%E5%BD%95%E9%94%99%E8%AF%AF%E6%97%A5%E5%BF%97\"><\/span>\u573a\u666f3\uff1a\u8bb0\u5f55\u9519\u8bef\u65e5\u5fd7<span class=\"ez-toc-section-end\"><\/span><\/h4><p>\u53ef\u4ee5\u5355\u72ec\u5c06 stderr \u91cd\u5b9a\u5411\u5230\u9519\u8bef\u65e5\u5fd7\u6587\u4ef6\uff1a<\/p><div class=\"md-code-block md-code-block-dark\"><pre><span class=\"token comment\"># \u6b63\u5e38\u8f93\u51fa\u5199\u5165 output.log\uff0c\u9519\u8bef\u5199\u5165 error.log<\/span>\n.\/script.sh <span class=\"token operator\">&gt;<\/span> output.log <span class=\"token operator\"><span class=\"token file-descriptor important\">2<\/span>&gt;<\/span> error.log<\/pre><\/div><hr \/><h3><span class=\"ez-toc-section\" id=\"4_%E4%B8%8D%E5%8A%A0_%3E_2_%E7%9A%84%E9%A3%8E%E9%99%A9\"><\/span>4.\u00a0<strong>\u4e0d\u52a0\u00a0<code>&gt;&amp;2<\/code>\u00a0\u7684\u98ce\u9669<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3><p>\u5982\u679c\u9519\u8bef\u4fe1\u606f\u901a\u8fc7 stdout \u8f93\u51fa\uff1a<\/p><ol start=\"1\"><li><p><strong>\u6c61\u67d3\u6b63\u5e38\u8f93\u51fa<\/strong>\uff1a\u5f53\u811a\u672c\u7ed3\u679c\u88ab\u5176\u4ed6\u7a0b\u5e8f\u89e3\u6790\u65f6\uff08\u5982 JSON \u5904\u7406\u5de5\u5177\uff09\uff0c\u9519\u8bef\u4fe1\u606f\u4f1a\u6df7\u5165\u6b63\u5e38\u6570\u636e\u3002<\/p><\/li><li><p><strong>\u96be\u4ee5\u8c03\u8bd5<\/strong>\uff1a\u65e0\u6cd5\u901a\u8fc7\u91cd\u5b9a\u5411\u5355\u72ec\u6355\u83b7\u9519\u8bef\u4fe1\u606f\u3002<\/p><\/li><li><p><strong>\u8fdd\u80cc Unix \u54f2\u5b66<\/strong>\uff1aUnix \u5de5\u5177\u94fe\u7ea6\u5b9a stdout \u4e3a\u201c\u7eaf\u51c0\u201d\u7684\u6570\u636e\u6d41\uff0cstderr \u4e3a\u8f85\u52a9\u4fe1\u606f\u6d41\u3002<\/p><\/li><\/ol><hr \/><h3><span class=\"ez-toc-section\" id=\"5_%E7%A4%BA%E4%BE%8B%E9%AA%8C%E8%AF%81\"><\/span>5.\u00a0<strong>\u793a\u4f8b\u9a8c\u8bc1<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3><h4><span class=\"ez-toc-section\" id=\"%E8%84%9A%E6%9C%AC%E5%86%85%E5%AE%B9_testsh\"><\/span>\u811a\u672c\u5185\u5bb9 (<code>test.sh<\/code>)<span class=\"ez-toc-section-end\"><\/span><\/h4><div class=\"md-code-block md-code-block-dark\"><pre><span class=\"token shebang important\">#!\/bin\/bash<\/span>\n<span class=\"token builtin class-name\">echo<\/span> <span class=\"token string\">\"\u8fd9\u662f\u6b63\u5e38\u8f93\u51fa\uff08stdout\uff09\"<\/span>\n<span class=\"token builtin class-name\">echo<\/span> <span class=\"token string\">\"\u8fd9\u662f\u9519\u8bef\u4fe1\u606f\uff08stderr\uff09\"<\/span> <span class=\"token operator\">&gt;<\/span><span class=\"token file-descriptor important\">&amp;2<\/span><\/pre><\/div><h4><span class=\"ez-toc-section\" id=\"%E8%BF%90%E8%A1%8C%E5%B9%B6%E9%87%8D%E5%AE%9A%E5%90%91\"><\/span>\u8fd0\u884c\u5e76\u91cd\u5b9a\u5411<span class=\"ez-toc-section-end\"><\/span><\/h4><div class=\"md-code-block md-code-block-dark\"><pre><span class=\"token comment\"># \u6b63\u5e38\u8f93\u51fa\u5199\u5165 output.log\uff0c\u9519\u8bef\u8f93\u51fa\u663e\u793a\u5728\u7ec8\u7aef<\/span>\n.\/test.sh <span class=\"token operator\">&gt;<\/span> output.log\n\n<span class=\"token comment\"># \u7ec8\u7aef\u663e\u793a\uff1a<\/span>\n\u8fd9\u662f\u9519\u8bef\u4fe1\u606f\uff08stderr\uff09\n\n<span class=\"token comment\"># output.log \u5185\u5bb9\uff1a<\/span>\n\u8fd9\u662f\u6b63\u5e38\u8f93\u51fa\uff08stdout\uff09\n\n<span class=\"token comment\"># \u5206\u79bb stdout \u548c stderr<\/span>\n.\/test.sh <span class=\"token operator\">&gt;<\/span> output.log <span class=\"token operator\"><span class=\"token file-descriptor important\">2<\/span>&gt;<\/span> error.log\n\n<span class=\"token comment\"># output.log \u5185\u5bb9\uff1a<\/span>\n\u8fd9\u662f\u6b63\u5e38\u8f93\u51fa\uff08stdout\uff09\n\n<span class=\"token comment\"># error.log \u5185\u5bb9\uff1a<\/span>\n\u8fd9\u662f\u9519\u8bef\u4fe1\u606f\uff08stderr\uff09<\/pre><\/div><hr \/><h3><span class=\"ez-toc-section\" id=\"6_%E6%9C%80%E4%BD%B3%E5%AE%9E%E8%B7%B5\"><\/span>6.\u00a0<strong>\u6700\u4f73\u5b9e\u8df5<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3><ul><li><p><strong>\u9519\u8bef\u3001\u8b66\u544a\u3001\u8c03\u8bd5\u4fe1\u606f<\/strong>\uff1a\u59cb\u7ec8\u4f7f\u7528\u00a0<code>&gt;&amp;2<\/code>\u00a0\u8f93\u51fa\u5230 stderr\u3002<\/p><\/li><li><p><strong>\u6b63\u5e38\u7ed3\u679c<\/strong>\uff1a\u4f7f\u7528 stdout\u3002<\/p><\/li><li><p><strong>\u811a\u672c\u5f00\u5934\u58f0\u660e\u91cd\u5b9a\u5411<\/strong>\uff08\u53ef\u9009\uff09\uff1a<\/p><div class=\"md-code-block md-code-block-dark\"><div class=\"md-code-block-banner-wrap\"><div class=\"md-code-block-banner\">\u00a0<\/div><\/div><pre><span class=\"token comment\"># \u786e\u4fdd\u6240\u6709 echo \u9ed8\u8ba4\u8f93\u51fa\u5230 stderr<\/span>\n<span class=\"token builtin class-name\">exec<\/span> <span class=\"token operator\"><span class=\"token file-descriptor important\">1<\/span>&gt;<\/span><span class=\"token file-descriptor important\">&amp;2<\/span>\n<span class=\"token builtin class-name\">echo<\/span> <span class=\"token string\">\"\u6240\u6709\u8f93\u51fa\u9ed8\u8ba4\u4e3a\u9519\u8bef\u4fe1\u606f\"<\/span><\/pre><\/div><\/li><\/ul><hr \/><h3><span class=\"ez-toc-section\" id=\"%E6%80%BB%E7%BB%93\"><\/span>\u603b\u7ed3<span class=\"ez-toc-section-end\"><\/span><\/h3><table><thead><tr><th>\u64cd\u4f5c<\/th><th>\u4f18\u70b9<\/th><th>\u7f3a\u70b9<\/th><\/tr><\/thead><tbody><tr><td><strong>\u52a0\u00a0<code>&gt;&amp;2<\/code><\/strong><\/td><td>\u7b26\u5408\u89c4\u8303\u3001\u8f93\u51fa\u6d41\u5206\u79bb\u3001\u6613\u4e8e\u8c03\u8bd5<\/td><td>\u4ee3\u7801\u7a0d\u663e\u590d\u6742<\/td><\/tr><tr><td><strong>\u4e0d\u52a0\u00a0<code>&gt;&amp;2<\/code><\/strong><\/td><td>\u4ee3\u7801\u7b80\u5355<\/td><td>\u7834\u574f\u6570\u636e\u6d41\u7eaf\u51c0\u6027\u3001\u96be\u4ee5\u7ef4\u62a4<\/td><\/tr><\/tbody><\/table><p><strong>\u7ed3\u8bba<\/strong>\uff1a\u5c3d\u7ba1\u5728\u7b80\u5355\u573a\u666f\u4e2d\u4e0d\u52a0\u00a0<code>&gt;&amp;2<\/code>\u00a0\u770b\u4f3c\u201c\u4e0d\u5f71\u54cd\u8f93\u51fa\u201d\uff0c\u4f46\u4ece\u811a\u672c\u5065\u58ee\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c Unix \u89c4\u8303\u89d2\u5ea6\u51fa\u53d1\uff0c<strong>\u5fc5\u987b\u4e3a\u9519\u8bef\u4fe1\u606f\u4f7f\u7528\u00a0<code>&gt;&amp;2<\/code><\/strong>\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>\u00a0 \u5728Shell\u811a\u672c\u4e2d\uff0c&gt;&amp;2\u00a0\u662f\u4e00\u4e2a\u00a0\u8f93\u51fa\u91cd\u5b9a\u5411\u64cd\u4f5c\u7b26\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u5c06\u547d\u4ee4\u7684\u8f93\u51fa\u53d1\u9001\u5230\u00a0\u6807\u51c6\u9519\u8bef [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","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":[1],"tags":[15],"class_list":["post-1277","post","type-post","status-publish","format-standard","hentry","category-vxhs888p","tag-check_error"],"_links":{"self":[{"href":"https:\/\/linuxjk.cn\/index.php?rest_route=\/wp\/v2\/posts\/1277","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/linuxjk.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/linuxjk.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/linuxjk.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/linuxjk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1277"}],"version-history":[{"count":7,"href":"https:\/\/linuxjk.cn\/index.php?rest_route=\/wp\/v2\/posts\/1277\/revisions"}],"predecessor-version":[{"id":1284,"href":"https:\/\/linuxjk.cn\/index.php?rest_route=\/wp\/v2\/posts\/1277\/revisions\/1284"}],"wp:attachment":[{"href":"https:\/\/linuxjk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1277"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/linuxjk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1277"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/linuxjk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}