{"id":44862,"date":"2024-10-06T18:45:14","date_gmt":"2024-10-06T10:45:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/44862\/"},"modified":"2024-10-06T18:45:14","modified_gmt":"2024-10-06T10:45:14","slug":"linux-%e5%91%bd%e4%bb%a4%ef%bc%9aunset-%e5%88%aa%e9%99%a4%e8%ae%8a%e9%87%8f%e6%88%96%e5%87%bd%e6%95%b8%e5%90%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/44862\/","title":{"rendered":"Linux \u547d\u4ee4\uff1aunset &#8211; \u522a\u9664\u8b8a\u91cf\u6216\u51fd\u6578\u540d"},"content":{"rendered":"<h1 id=\"linux-%e5%91%bd%e4%bb%a4%ef%bc%9aunset-%e5%88%aa%e9%99%a4%e8%ae%8a%e9%87%8f%e6%88%96%e5%87%bd%e6%95%b8%e5%90%8d-wckqMZqcZM\">Linux \u547d\u4ee4\uff1aunset &#8211; \u522a\u9664\u8b8a\u91cf\u6216\u51fd\u6578\u540d<\/h1>\n<p>\u5728 Linux \u7cfb\u7d71\u4e2d\uff0c\u74b0\u5883\u8b8a\u91cf\u548c\u51fd\u6578\u662f\u7528\u4f86\u5b58\u5132\u548c\u7ba1\u7406\u4fe1\u606f\u7684\u91cd\u8981\u5de5\u5177\u3002\u96a8\u8457\u4f7f\u7528\u7684\u6df1\u5165\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u9700\u8981\u522a\u9664\u67d0\u4e9b\u8b8a\u91cf\u6216\u51fd\u6578\u7684\u60c5\u6cc1\u3002\u9019\u6642\uff0c<code>unset<\/code> \u547d\u4ee4\u4fbf\u6210\u70ba\u4e86\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e <code>unset<\/code> \u547d\u4ee4\u7684\u7528\u6cd5\u53ca\u5176\u5728\u65e5\u5e38\u64cd\u4f5c\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-unset-%e5%91%bd%e4%bb%a4%ef%bc%9f-wckqMZqcZM\">\u4ec0\u9ebc\u662f unset \u547d\u4ee4\uff1f<\/h2>\n<p><code>unset<\/code> \u662f\u4e00\u500b\u7528\u65bc\u522a\u9664\u8b8a\u91cf\u6216\u51fd\u6578\u540d\u7684\u547d\u4ee4\u3002\u7576\u4f60\u4e0d\u518d\u9700\u8981\u67d0\u500b\u8b8a\u91cf\u6216\u51fd\u6578\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b64\u547d\u4ee4\u4f86\u91cb\u653e\u8cc7\u6e90\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6df7\u6dc6\u3002\u9019\u5728\u8173\u672c\u7de8\u5beb\u548c\u7cfb\u7d71\u7ba1\u7406\u4e2d\u5c24\u70ba\u91cd\u8981\uff0c\u56e0\u70ba\u5b83\u6709\u52a9\u65bc\u4fdd\u6301\u74b0\u5883\u7684\u6574\u6f54\u3002<\/p>\n<h2 id=\"unset-%e5%91%bd%e4%bb%a4%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-wckqMZqcZM\">unset \u547d\u4ee4\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<pre><code>unset [\u9078\u9805] \u8b8a\u91cf\u540d<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>\u8b8a\u91cf\u540d<\/code> \u662f\u4f60\u5e0c\u671b\u522a\u9664\u7684\u8b8a\u91cf\u6216\u51fd\u6578\u7684\u540d\u7a31\u3002<code>unset<\/code> \u547d\u4ee4\u7684\u9078\u9805\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>-f<\/code>\uff1a\u7528\u65bc\u522a\u9664\u51fd\u6578\u3002<\/li>\n<li><code>-v<\/code>\uff1a\u7528\u65bc\u522a\u9664\u8b8a\u91cf\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-unset-%e5%88%aa%e9%99%a4%e8%ae%8a%e9%87%8f-wckqMZqcZM\">\u4f7f\u7528 unset \u522a\u9664\u8b8a\u91cf<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528 <code>unset<\/code> \u522a\u9664\u8b8a\u91cf\uff1a<\/p>\n<pre><code># \u5b9a\u7fa9\u4e00\u500b\u8b8a\u91cf\nMY_VAR=\"Hello, World!\"\n\n# \u67e5\u770b\u8b8a\u91cf\u7684\u503c\necho $MY_VAR\n\n# \u4f7f\u7528 unset \u522a\u9664\u8b8a\u91cf\nunset MY_VAR\n\n# \u5617\u8a66\u67e5\u770b\u8b8a\u91cf\u7684\u503c\necho $MY_VAR  # \u4e0d\u6703\u8f38\u51fa\u4efb\u4f55\u5167\u5bb9\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5b9a\u7fa9\u4e86\u4e00\u500b\u8b8a\u91cf <code>MY_VAR<\/code>\uff0c\u7136\u5f8c\u4f7f\u7528 <code>unset<\/code> \u522a\u9664\u5b83\u3002\u7576\u6211\u5011\u518d\u6b21\u5617\u8a66\u67e5\u770b <code>MY_VAR<\/code> \u7684\u503c\u6642\uff0c\u5c07\u4e0d\u6703\u6709\u4efb\u4f55\u8f38\u51fa\uff0c\u56e0\u70ba\u8a72\u8b8a\u91cf\u5df2\u88ab\u522a\u9664\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-unset-%e5%88%aa%e9%99%a4%e5%87%bd%e6%95%b8-wckqMZqcZM\">\u4f7f\u7528 unset \u522a\u9664\u51fd\u6578<\/h2>\n<p>\u9664\u4e86\u8b8a\u91cf\uff0c<code>unset<\/code> \u9084\u53ef\u4ee5\u7528\u4f86\u522a\u9664\u51fd\u6578\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code># \u5b9a\u7fa9\u4e00\u500b\u51fd\u6578\nmy_function() {\n    echo \"This is my function.\"\n}\n\n# \u8abf\u7528\u51fd\u6578\nmy_function\n\n# \u4f7f\u7528 unset \u522a\u9664\u51fd\u6578\nunset -f my_function\n\n# \u5617\u8a66\u8abf\u7528\u51fd\u6578\nmy_function  # \u5c07\u986f\u793a\u932f\u8aa4\u4fe1\u606f\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u540d\u70ba <code>my_function<\/code> \u7684\u51fd\u6578\uff0c\u7136\u5f8c\u8abf\u7528\u5b83\u3002\u63a5\u8457\uff0c\u6211\u5011\u4f7f\u7528 <code>unset -f<\/code> \u522a\u9664\u8a72\u51fd\u6578\uff0c\u7576\u6211\u5011\u518d\u6b21\u5617\u8a66\u8abf\u7528\u5b83\u6642\uff0c\u5c07\u6703\u986f\u793a\u932f\u8aa4\u4fe1\u606f\uff0c\u56e0\u70ba\u8a72\u51fd\u6578\u5df2\u4e0d\u518d\u5b58\u5728\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-wckqMZqcZM\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u4f7f\u7528 <code>unset<\/code> \u547d\u4ee4\u6642\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u4e00\u65e6\u8b8a\u91cf\u6216\u51fd\u6578\u88ab\u522a\u9664\uff0c\u5c07\u7121\u6cd5\u6062\u5fa9\u3002<\/li>\n<li>\u5728\u4f7f\u7528 <code>unset<\/code> \u522a\u9664\u7cfb\u7d71\u9810\u8a2d\u7684\u74b0\u5883\u8b8a\u91cf\u6642\uff0c\u9700\u8b39\u614e\u64cd\u4f5c\uff0c\u4ee5\u514d\u5f71\u97ff\u7cfb\u7d71\u7684\u6b63\u5e38\u904b\u884c\u3002<\/li>\n<li>\u5728\u8173\u672c\u4e2d\u4f7f\u7528 <code>unset<\/code> \u53ef\u4ee5\u5e6b\u52a9\u91cb\u653e\u8cc7\u6e90\uff0c\u4fdd\u6301\u74b0\u5883\u7684\u6574\u6f54\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wckqMZqcZM\">\u7e3d\u7d50<\/h2>\n<p>\u5728 Linux \u7cfb\u7d71\u4e2d\uff0c<code>unset<\/code> \u547d\u4ee4\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7528\u65bc\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u8b8a\u91cf\u6216\u51fd\u6578\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u6b64\u547d\u4ee4\uff0c\u53ef\u4ee5\u6709\u6548\u7ba1\u7406\u7cfb\u7d71\u8cc7\u6e90\uff0c\u4fdd\u6301\u74b0\u5883\u7684\u6574\u6f54\u3002\u7121\u8ad6\u662f\u5728\u65e5\u5e38\u64cd\u4f5c\u9084\u662f\u8173\u672c\u7de8\u5beb\u4e2d\uff0c\u638c\u63e1 <code>unset<\/code> \u7684\u7528\u6cd5\u90fd\u5c07\u5c0d\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u5927\u6709\u88e8\u76ca\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 Linux \u547d\u4ee4 &#8220;unset&#8221;\uff0c\u7528\u65bc\u522a\u9664\u8b8a\u91cf\u6216\u51fd\u6578\u540d\uff0c\u7c21\u5316\u74b0\u5883\u8a2d\u7f6e\uff0c\u63d0\u5347\u7cfb\u7d71\u7ba1\u7406\u6548\u7387\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-44862","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/44862","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=44862"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/44862\/revisions"}],"predecessor-version":[{"id":44863,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/44862\/revisions\/44863"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=44862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=44862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=44862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}