{"id":2895,"date":"2017-11-29T22:01:02","date_gmt":"2017-11-29T14:01:02","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=2895"},"modified":"2017-11-29T22:01:02","modified_gmt":"2017-11-29T14:01:02","slug":"centos%e9%87%8d%e5%ae%9a%e5%90%91%e5%91%bd%e4%bb%a4","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/hemanual\/centos%e9%87%8d%e5%ae%9a%e5%90%91%e5%91%bd%e4%bb%a4\/","title":{"rendered":"centos\u91cd\u5b9a\u5411\u547d\u4ee4"},"content":{"rendered":"<pre class=\"prettyprint\"><code class=\"language-bash hljs  has-numbering\">yw &gt;outfile <span class=\"hljs-number\">2<\/span>&gt;&amp;<span class=\"hljs-number\">1<\/span>\r\n$ cat outfile \r\ncat: oyyw: \u6ca1\u6709\u90a3\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55<\/code><\/pre>\n<p>\u548c<\/p>\n<pre class=\"prettyprint\"><code class=\"language-bash hljs  has-numbering\">$ cat oyyw <span class=\"hljs-number\">2<\/span>&gt;&amp;<span class=\"hljs-number\">1<\/span> &gt;outfile\r\ncat: oyyw: \u6ca1\u6709\u90a3\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55<\/code><\/pre>\n<h2 id=\"\u89e3\u60d1\"><a name=\"t1\"><\/a>\u89e3\u60d1<\/h2>\n<p>\u641c\u96c6\u4e86\u4e00\u90e8\u5206\u8d44\u6599\u4ee5\u540e\uff0c\u89e3\u7b54\u5982\u4e0b\uff1a<\/p>\n<p>\u987a\u5e8f\u662f\u5f88\u91cd\u8981\u7684\uff01\u547d\u4ee4\u7684\u6267\u884c\u662f\u81ea\u5de6\u5411\u53f3\u7684\uff0c\u56e0\u6b64\uff1a\u00a0 * \u5bf9\u4e8e\u7b2c\u4e00\u4e2a\u547d\u4ee4\uff0cshell\u9996\u5148\u8bfb\u5230<code>&gt;outfile<\/code>\uff08\u7b49\u540c\u4e8e<code>1&gt;outfile<\/code>\uff09\uff0c\u6b64\u65f6<code>\u6807\u51c6\u8f93\u51fa<\/code>\u91cd\u5b9a\u5411\u5230\u4e86\u6587\u4ef6<code>outfile<\/code>\uff0c\u7136\u540eshell\u518d\u8bfb\u5230<code>2&gt;&amp;1<\/code>\uff0c\u6b64\u65f6<code>\u6807\u51c6\u9519\u8bef\u8f93\u51fa<\/code>\u91cd\u5b9a\u5411\u5230\u4e86<code>\u6807\u51c6\u8f93\u51fa<\/code>\uff0c\u4e5f\u5c31\u662f\u91cd\u5b9a\u5411\u5230\u4e86\u6587\u4ef6<code>outfile<\/code>\uff0c\u6240\u4ee5\u5f97\u5230\u7684\u7ed3\u679c\u662f\u00a0<strong><code>\u6807\u51c6\u8f93\u51fa<\/code>\u548c<code>\u6807\u51c6\u9519\u8bef\u8f93\u51fa<\/code>\u90fd\u91cd\u5b9a\u5411\u5230\u4e86\u6587\u4ef6<code>outfile<\/code>\u4e2d<\/strong><\/p>\n<ul>\n<li>\u5bf9\u4e8e\u7b2c\u4e8c\u4e2a\u547d\u4ee4\uff0cshell\u9996\u5148\u8bfb\u5230<code>2&gt;&amp;1<\/code>\uff0c\u6b64\u65f6<code>\u6807\u51c6\u9519\u8bef\u8f93\u51fa<\/code>\u91cd\u5b9a\u5411\u5230\u4e86<code>\u6807\u51c6\u8f93\u51fa<\/code>\uff08\u53ef\u80fd\u662f\u63a7\u5236\u53f0\uff09\uff0c\u7136\u540eshell\u518d\u8bfb\u5230<code>&gt;outfile<\/code>\uff08\u7b49\u540c\u4e8e<code>1&gt;outfile<\/code>\uff09\uff0c\u6b64\u65f6<code>\u6807\u51c6\u8f93\u51fa<\/code>\u91cd\u5b9a\u5411\u5230\u4e86\u6587\u4ef6<code>outfile<\/code>\uff0c\u5f97\u5230\u7684\u7ed3\u679c\u662f\u00a0<strong><code>\u6807\u51c6\u9519\u8bef\u8f93\u51fa<\/code>\u8f93\u51fa\u5230\u4e86\u63a7\u5236\u53f0\uff0c<code>\u6807\u51c6\u8f93\u51fa<\/code>\u8f93\u51fa\u5230\u6587\u4ef6<code>outfile<\/code>\u4e2d<\/strong><\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u8fd9\u4e2a\u4f8b\u5b50\uff0c\u5e94\u8be5\u53ef\u4ee5\u5f88\u597d\u89e3\u7b54\u4e0a\u9762\u7684\u7591\u95ee\u4e86\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\"language-bash hljs  has-numbering\">$ cat learn_redirect.sh \r\n<span class=\"hljs-shebang\">#!\/bin\/bash\r\n<\/span>\r\n<span class=\"hljs-function\">foo<\/span>() {\r\n    <span class=\"hljs-built_in\">echo<\/span> <span class=\"hljs-string\">\"This is stdout\"<\/span>;        <span class=\"hljs-comment\"># \u8f93\u51fa\u662f\u6807\u51c6\u8f93\u51fa<\/span>\r\n    <span class=\"hljs-built_in\">echo<\/span> <span class=\"hljs-string\">\"This is stderr\"<\/span> <span class=\"hljs-number\">1<\/span>&gt;&amp;<span class=\"hljs-number\">2<\/span>;   <span class=\"hljs-comment\"># \u8f93\u51fa\u662f\u6807\u51c6\u9519\u8bef\u8f93\u51fa<\/span>\r\n}\r\n\r\nfoo &gt;errlog <span class=\"hljs-number\">2<\/span>&gt;&amp;<span class=\"hljs-number\">1<\/span> &gt;outfile<\/code><\/pre>\n<pre class=\"prettyprint\"><code class=\"language-bash hljs  has-numbering\">[pms@jq-hadoop ~\/workspace\/ouyangyewei\/learn_linux] eth0 = xxx\r\n$ sh learn_redirect.sh \r\n[pms@jq-hadoop ~\/workspace\/ouyangyewei\/learn_linux] eth0 = xxx\r\n$ cat outfile \r\nThis is stdout\r\n[pms@jq-hadoop ~\/workspace\/ouyangyewei\/learn_linux] eth0 = xxx\r\n$ cat errlog \r\nThis is stderr<\/code><\/pre>\n<h2 id=\"\u89e3\u91ca\u5982\u4e0b\"><a name=\"t2\"><\/a>\u89e3\u91ca\u5982\u4e0b<\/h2>\n<p><code>foo &gt;errlog 2&gt;&amp;1 &gt;outfile<\/code>\u00a0\u8fd9\u4e00\u53e5\u547d\u4ee4\uff0cshell\u6267\u884c\u987a\u5e8f\u662f\u4ece\u5de6\u5411\u53f3\u3002\u9996\u5148shell\u8bfb\u5230<code>&gt;errlog<\/code>\uff0c\u6b64\u65f6<code>\u6807\u51c6\u8f93\u51fa<\/code>\u91cd\u5b9a\u5411\u5230\u4e86\u6587\u4ef6<code>errlog<\/code>\uff0c\u7136\u540eshell\u8bfb\u5230<code>2&gt;&amp;1<\/code>\uff0c\u6b64\u65f6<code>\u6807\u51c6\u9519\u8bef\u8f93\u51fa<\/code>\u91cd\u5b9a\u5411\u5230\u4e86<code>\u6807\u51c6\u8f93\u51fa<\/code>\uff08\u7b49\u540c\u4e8e<code>\u6807\u51c6\u9519\u8bef\u8f93\u51fa<\/code>\u91cd\u5b9a\u5411\u5230\u4e86\u6587\u4ef6<code>errlog<\/code>\uff09\uff0c\u7136\u540eshell\u8bfb\u5230<code>&gt;outfile<\/code>\uff0c\u6b64\u65f6<code>\u6807\u51c6\u8f93\u51fa<\/code>\u91cd\u5b9a\u5411\u5230\u6587\u4ef6<code>outfile<\/code>\uff0c\u56e0\u6b64\uff0c\u5f97\u5230\u7684\u7ed3\u679c\u662f\u00a0<strong><code>\u6807\u51c6\u9519\u8bef\u8f93\u51fa<\/code>\u8f93\u51fa\u5230\u6587\u4ef6<code>errlog<\/code>\u4e2d\uff0c<code>\u6807\u51c6\u8f93\u51fa<\/code>\u8f93\u51fa\u5230\u4e86\u6587\u4ef6<code>outfile<\/code>\u4e2d<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>yw &gt;outfile 2&gt;&amp;1 $ cat outfile cat: oyyw: \u6ca1\u6709\u90a3 &#8230; <a title=\"centos\u91cd\u5b9a\u5411\u547d\u4ee4\" class=\"read-more\" href=\"https:\/\/cn.hostease.com\/xueyuan\/hemanual\/centos%e9%87%8d%e5%ae%9a%e5%90%91%e5%91%bd%e4%bb%a4\/\" aria-label=\"\u9605\u8bfb centos\u91cd\u5b9a\u5411\u547d\u4ee4\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3,49],"tags":[38,151],"class_list":["post-2895","post","type-post","status-publish","format-standard","hentry","category-hemanual","category-linux","tag-linux","tag-151"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2895","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=2895"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2895\/revisions"}],"predecessor-version":[{"id":2896,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2895\/revisions\/2896"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=2895"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=2895"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=2895"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}