{"id":45376,"date":"2024-10-06T22:55:18","date_gmt":"2024-10-06T14:55:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/45376\/"},"modified":"2024-10-06T22:55:18","modified_gmt":"2024-10-06T14:55:18","slug":"%e4%bf%ae%e5%be%a9-linux-%e9%8c%af%e8%aa%a4-%e7%84%a1%e6%b3%95%e7%82%ba%e5%91%bd%e4%bb%a4%e6%9b%bf%e6%8f%9b%e5%89%b5%e5%bb%ba%e7%ae%a1%e9%81%93","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/45376\/","title":{"rendered":"\u4fee\u5fa9 Linux \u932f\u8aa4 &#8211; \u7121\u6cd5\u70ba\u547d\u4ee4\u66ff\u63db\u5275\u5efa\u7ba1\u9053"},"content":{"rendered":"<h1 id=\"%e4%bf%ae%e5%be%a9-linux-%e9%8c%af%e8%aa%a4-%e7%84%a1%e6%b3%95%e7%82%ba%e5%91%bd%e4%bb%a4%e6%9b%bf%e6%8f%9b%e5%89%b5%e5%bb%ba%e7%ae%a1%e9%81%93-FTAOanHZJH\">\u4fee\u5fa9 Linux \u932f\u8aa4 &#8211; \u7121\u6cd5\u70ba\u547d\u4ee4\u66ff\u63db\u5275\u5efa\u7ba1\u9053<\/h1>\n<p>\u5728\u4f7f\u7528 Linux \u7cfb\u7d71\u6642\uff0c\u4f7f\u7528\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u662f\u300c\u7121\u6cd5\u70ba\u547d\u4ee4\u66ff\u63db\u5275\u5efa\u7ba1\u9053\u300d\u7684\u932f\u8aa4\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u57f7\u884c\u547d\u4ee4\u6642\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528\u547d\u4ee4\u66ff\u63db\uff08command substitution\uff09\u6642\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%91%bd%e4%bb%a4%e6%9b%bf%e6%8f%9b%ef%bc%9f-FTAOanHZJH\">\u4ec0\u9ebc\u662f\u547d\u4ee4\u66ff\u63db\uff1f<\/h2>\n<p>\u547d\u4ee4\u66ff\u63db\u662f\u6307\u5728\u547d\u4ee4\u884c\u4e2d\u4f7f\u7528\u5176\u4ed6\u547d\u4ee4\u7684\u8f38\u51fa\u4f5c\u70ba\u53c3\u6578\u3002\u9019\u901a\u5e38\u662f\u901a\u904e\u4f7f\u7528\u53cd\u5f15\u865f\uff08`\uff09\u6216 $() \u4f86\u5be6\u73fe\u7684\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>result=$(ls -l)<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c`ls -l` \u7684\u8f38\u51fa\u5c07\u88ab\u8ce6\u503c\u7d66\u8b8a\u6578 result\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0-FTAOanHZJH\">\u932f\u8aa4\u539f\u56e0<\/h2>\n<p>\u300c\u7121\u6cd5\u70ba\u547d\u4ee4\u66ff\u63db\u5275\u5efa\u7ba1\u9053\u300d\u7684\u932f\u8aa4\u901a\u5e38\u662f\u7531\u4ee5\u4e0b\u5e7e\u500b\u539f\u56e0\u5f15\u8d77\u7684\uff1a<\/p>\n<ul>\n<li><strong>\u7cfb\u7d71\u8cc7\u6e90\u4e0d\u8db3\uff1a<\/strong>\u7576\u7cfb\u7d71\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u6216\u9032\u7a0b\u6578\u91cf\u9054\u5230\u4e0a\u9650\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u9019\u500b\u932f\u8aa4\u3002<\/li>\n<li><strong>\u547d\u4ee4\u8a9e\u6cd5\u932f\u8aa4\uff1a<\/strong>\u5982\u679c\u547d\u4ee4\u7684\u8a9e\u6cd5\u4e0d\u6b63\u78ba\uff0c\u7cfb\u7d71\u53ef\u80fd\u7121\u6cd5\u6b63\u78ba\u89e3\u6790\u547d\u4ee4\uff0c\u5f9e\u800c\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<li><strong>\u74b0\u5883\u8b8a\u6578\u554f\u984c\uff1a<\/strong>\u67d0\u4e9b\u74b0\u5883\u8b8a\u6578\u672a\u6b63\u78ba\u8a2d\u7f6e\uff0c\u53ef\u80fd\u6703\u5f71\u97ff\u547d\u4ee4\u7684\u57f7\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%b3%95-FTAOanHZJH\">\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n<p>\u91dd\u5c0d\u4e0a\u8ff0\u539f\u56e0\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u89e3\u6c7a\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e7%b3%bb%e7%b5%b1%e8%b3%87%e6%ba%90-FTAOanHZJH\">1. \u6aa2\u67e5\u7cfb\u7d71\u8cc7\u6e90<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6aa2\u67e5\u7576\u524d\u7684\u9032\u7a0b\u6578\u91cf\u548c\u6587\u4ef6\u63cf\u8ff0\u7b26\u4f7f\u7528\u60c5\u6cc1\uff1a<\/p>\n<pre><code>ulimit -u  # \u67e5\u770b\u6700\u5927\u9032\u7a0b\u6578\u91cf\nulimit -n  # \u67e5\u770b\u6700\u5927\u6587\u4ef6\u63cf\u8ff0\u7b26\u6578\u91cf<\/code><\/pre>\n<p>\u5982\u679c\u767c\u73fe\u9019\u4e9b\u6578\u503c\u904e\u4f4e\uff0c\u53ef\u4ee5\u901a\u904e\u7de8\u8f2f \/etc\/security\/limits.conf \u6587\u4ef6\u4f86\u589e\u52a0\u9019\u4e9b\u9650\u5236\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>* soft nofile 4096\n* hard nofile 8192<\/code><\/pre>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5%e5%91%bd%e4%bb%a4%e8%aa%9e%e6%b3%95-FTAOanHZJH\">2. \u6aa2\u67e5\u547d\u4ee4\u8a9e\u6cd5<\/h3>\n<p>\u78ba\u4fdd\u547d\u4ee4\u7684\u8a9e\u6cd5\u6b63\u78ba\u3002\u53ef\u4ee5\u901a\u904e\u5728\u547d\u4ee4\u884c\u4e2d\u55ae\u7368\u57f7\u884c\u6bcf\u500b\u90e8\u5206\u4f86\u6aa2\u67e5\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ls -l<\/code><\/pre>\n<p>\u5982\u679c\u9019\u500b\u547d\u4ee4\u80fd\u6b63\u5e38\u57f7\u884c\uff0c\u5247\u53ef\u4ee5\u9032\u4e00\u6b65\u6aa2\u67e5\u547d\u4ee4\u66ff\u63db\u7684\u90e8\u5206\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e7%92%b0%e5%a2%83%e8%ae%8a%e6%95%b8-FTAOanHZJH\">3. \u6aa2\u67e5\u74b0\u5883\u8b8a\u6578<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6aa2\u67e5\u76f8\u95dc\u7684\u74b0\u5883\u8b8a\u6578\uff1a<\/p>\n<pre><code>echo $PATH<\/code><\/pre>\n<p>\u78ba\u4fdd\u6240\u6709\u5fc5\u8981\u7684\u8def\u5f91\u90fd\u5df2\u6b63\u78ba\u8a2d\u7f6e\u3002\u5982\u679c\u767c\u73fe\u554f\u984c\uff0c\u53ef\u4ee5\u901a\u904e\u7de8\u8f2f ~\/.bashrc \u6216 ~\/.bash_profile \u6587\u4ef6\u4f86\u4fee\u6b63\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-FTAOanHZJH\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u53ef\u80fd\u5c0e\u81f4\u932f\u8aa4\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>result=$(cat non_existent_file.txt)<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u56e0\u70ba\u6a94\u6848\u4e0d\u5b58\u5728\uff0c\u547d\u4ee4\u66ff\u63db\u5c07\u5931\u6557\u3002\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5\u6a94\u6848\u662f\u5426\u5b58\u5728\u4f86\u907f\u514d\u9019\u500b\u554f\u984c\uff1a<\/p>\n<pre><code>if [ -f \"non_existent_file.txt\" ]; then\n    result=$(cat non_existent_file.txt)\nelse\n    echo \"\u6a94\u6848\u4e0d\u5b58\u5728\"\nfi<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FTAOanHZJH\">\u7e3d\u7d50<\/h2>\n<p>\u300c\u7121\u6cd5\u70ba\u547d\u4ee4\u66ff\u63db\u5275\u5efa\u7ba1\u9053\u300d\u7684\u932f\u8aa4\u53ef\u80fd\u7531\u591a\u7a2e\u539f\u56e0\u5f15\u8d77\uff0c\u5305\u62ec\u7cfb\u7d71\u8cc7\u6e90\u4e0d\u8db3\u3001\u547d\u4ee4\u8a9e\u6cd5\u932f\u8aa4\u548c\u74b0\u5883\u8b8a\u6578\u554f\u984c\u3002\u901a\u904e\u6aa2\u67e5\u7cfb\u7d71\u8cc7\u6e90\u3001\u78ba\u8a8d\u547d\u4ee4\u8a9e\u6cd5\u53ca\u74b0\u5883\u8b8a\u6578\u8a2d\u7f6e\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u500b\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u904b\u884c\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u8cc7\u6e90\u7684\u5145\u8db3\uff0c\u5f9e\u800c\u6e1b\u5c11\u985e\u4f3c\u932f\u8aa4\u7684\u767c\u751f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fee\u5fa9 Linux \u932f\u8aa4\uff1a\u7121\u6cd5\u70ba\u547d\u4ee4\u66ff\u63db\u5275\u5efa\u7ba1\u9053\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u5feb\u901f\u6392\u9664\u6545\u969c\u4e26\u6062\u5fa9\u7cfb\u7d71\u6b63\u5e38\u904b\u884c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-45376","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/45376","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=45376"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/45376\/revisions"}],"predecessor-version":[{"id":45377,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/45376\/revisions\/45377"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=45376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=45376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=45376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}