{"id":138,"date":"2023-03-20T14:31:30","date_gmt":"2023-03-20T06:31:30","guid":{"rendered":"http:\/\/idc.birk.cn\/?p=138"},"modified":"2023-03-20T14:41:57","modified_gmt":"2023-03-20T06:41:57","slug":"linux-cat-%e5%91%bd%e4%bb%a4","status":"publish","type":"post","link":"https:\/\/idc.birk.cn\/?p=138","title":{"rendered":"Linux cat \u547d\u4ee4"},"content":{"rendered":"<p>cat\uff08\u82f1\u6587\u5168\u62fc\uff1aconcatenate\uff09\u547d\u4ee4\u7528\u4e8e\u8fde\u63a5\u6587\u4ef6\u5e76\u6253\u5370\u5230\u6807\u51c6\u8f93\u51fa\u8bbe\u5907\u4e0a\u3002\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u6709\u4e2dconcatenate\u7684\u7528\u6cd5\uff0c\u7528\u5904\u662f\u5c06\u591a\u4e2a\u6587\u5b57\u4e32\u5408\u5e76\u5230\u4e00\u4e2a\u6587\u5b57\u4e32\u4e2d\uff0clinux\u4e2dcat\u7684\u529f\u80fd\u662f\u5c06\u6587\u4ef6\u5185\u5bb9\u8f93\u51fa\u5230\u5176\u4ed6\u65b9\u5411\uff08\u7ec8\u7aef\u8f93\u51fa\u3001\u6587\u672c\u8f93\u51fa\uff09\u3002<\/p>\n<h3>\u4f7f\u7528\u6743\u9650<\/h3>\n<p>\u6240\u6709\u4f7f\u7528\u8005<\/p>\n<h3>\u8bed\u6cd5\u683c\u5f0f<\/h3>\n<pre class=\"prettyprint prettyprinted\"><span class=\"pln\">cat <\/span><span class=\"pun\">[-<\/span><span class=\"typ\">AbeEnstTuv<\/span><span class=\"pun\">]<\/span> <span class=\"pun\">[--<\/span><span class=\"pln\">help<\/span><span class=\"pun\">]<\/span> <span class=\"pun\">[--<\/span><span class=\"pln\">version<\/span><span class=\"pun\">]<\/span><span class=\"pln\"> fileName<\/span><\/pre>\n<h3>\u53c2\u6570\u8bf4\u660e\uff1a<\/h3>\n<p><strong>-n \u6216 --number<\/strong>\uff1a\u7531 1 \u5f00\u59cb\u5bf9\u6240\u6709\u8f93\u51fa\u7684\u884c\u6570\u7f16\u53f7\u3002<\/p>\n<p><strong>-b \u6216 --number-nonblank<\/strong>\uff1a\u548c -n \u76f8\u4f3c\uff0c\u53ea\u4e0d\u8fc7\u5bf9\u4e8e\u7a7a\u767d\u884c\u4e0d\u7f16\u53f7\u3002<\/p>\n<p><strong>-s \u6216 --squeeze-blank<\/strong>\uff1a\u5f53\u9047\u5230\u6709\u8fde\u7eed\u4e24\u884c\u4ee5\u4e0a\u7684\u7a7a\u767d\u884c\uff0c\u5c31\u4ee3\u6362\u4e3a\u4e00\u884c\u7684\u7a7a\u767d\u884c\u3002<\/p>\n<p><strong>-v \u6216 --show-nonprinting<\/strong>\uff1a\u4f7f\u7528 ^ \u548c M- \u7b26\u53f7\uff0c\u9664\u4e86 LFD \u548c TAB \u4e4b\u5916\u3002<\/p>\n<p><strong>-E \u6216 --show-ends\u00a0<\/strong>: \u5728\u6bcf\u884c\u7ed3\u675f\u5904\u663e\u793a $\u3002<\/p>\n<p><strong>-T \u6216 --show-tabs<\/strong>: \u5c06 TAB \u5b57\u7b26\u663e\u793a\u4e3a ^I\u3002<\/p>\n<p><strong>-A, --show-all<\/strong>\uff1a\u7b49\u4ef7\u4e8e -vET\u3002<\/p>\n<p><strong>-e\uff1a<\/strong>\u7b49\u4ef7\u4e8e\"-vE\"\u9009\u9879\uff1b<\/p>\n<p><strong>-t\uff1a<\/strong>\u7b49\u4ef7\u4e8e\"-vT\"\u9009\u9879\uff1b<\/p>\n<h3>\u5b9e\u4f8b\uff1a<\/h3>\n<p>\u60a8\u53ef\u4ee5\u5c06\u5176\u91cd\u5b9a\u5411\u5230\u6587\u4ef6\uff0c\u800c\u4e0d\u662f\u5c06\u8f93\u51fa\u663e\u793a\u5230stdout\uff08\u5728\u5c4f\u5e55\u4e0a\uff09\u3002<\/p>\n<p>\u4ee5\u4e0b\u547d\u4ee4\u5c06\u5185\u5bb9\u590d\u5236<code>file1.txt<\/code>\u5230<code>file2.txt<\/code>\u4f7f\u7528\uff08&gt;\uff09\u64cd\u4f5c\uff1a<\/p>\n<pre><code>cat file1.txt &gt; file2.txt<\/code><\/pre>\n<p>\u5982\u679c<code>file2.txt<\/code>\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u8be5\u547d\u4ee4\u5c06\u521b\u5efa\u5b83\u3002\u5426\u5219\uff0c\u5b83\u5c06\u8986\u76d6\u6587\u4ef6\u3002<\/p>\n<p>\u4f7f\u7528<code>\uff08&gt;&gt;\uff09<\/code>\u8fd0\u7b97\u7b26\u5c06\u7684\u5185\u5bb9\u9644\u52a0<code>file1.txt<\/code>\u5230<code>file2.txt<\/code>\uff1a<\/p>\n<pre><code>cat file1.txt &gt;&gt; file2.txt<\/code><\/pre>\n<p>\u4e0e\u4ee5\u524d\u76f8\u540c\uff0c\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u5c06\u521b\u5efa\u5b83\u3002<\/p>\n<p>\u628a textfile1 \u7684\u6587\u6863\u5185\u5bb9\u52a0\u4e0a\u884c\u53f7\u540e\u8f93\u5165 textfile2 \u8fd9\u4e2a\u6587\u6863\u91cc\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"pln\">cat <\/span><span class=\"pun\">-<\/span><span class=\"pln\">n textfile1 <\/span><span class=\"pun\">&gt;<\/span><span class=\"pln\"> textfile2<\/span><\/pre>\n<p>\u628a textfile1 \u548c textfile2 \u7684\u6587\u6863\u5185\u5bb9\u52a0\u4e0a\u884c\u53f7\uff08\u7a7a\u767d\u884c\u4e0d\u52a0\uff09\u4e4b\u540e\u5c06\u5185\u5bb9\u9644\u52a0\u5230 textfile3 \u6587\u6863\u91cc\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"pln\">cat <\/span><span class=\"pun\">-<\/span><span class=\"pln\">b textfile1 textfile2 <\/span><span class=\"pun\">&gt;&gt;<\/span><span class=\"pln\"> textfile3<\/span><\/pre>\n<p>\u6e05\u7a7a \/etc\/test.txt \u6587\u6863\u5185\u5bb9\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"pln\">cat <\/span><span class=\"pun\">\/<\/span><span class=\"pln\">dev<\/span><span class=\"pun\">\/<\/span><span class=\"kwd\">null<\/span> <span class=\"pun\">&gt;<\/span> <span class=\"str\">\/etc\/<\/span><span class=\"pln\">test<\/span><span class=\"pun\">.<\/span><span class=\"pln\">txt<\/span><\/pre>\n<p>cat \u4e5f\u53ef\u4ee5\u7528\u6765\u5236\u4f5c\u955c\u50cf\u6587\u4ef6\u3002\u4f8b\u5982\u8981\u5236\u4f5c\u8f6f\u76d8\u7684\u955c\u50cf\u6587\u4ef6\uff0c\u5c06\u8f6f\u76d8\u653e\u597d\u540e\u8f93\u5165\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"pln\">cat <\/span><span class=\"pun\">\/<\/span><span class=\"pln\">dev<\/span><span class=\"pun\">\/<\/span><span class=\"pln\">fd0 <\/span><span class=\"pun\">&gt;<\/span><span class=\"pln\"> OUTFILE<\/span><\/pre>\n<p>\u76f8\u53cd\u7684\uff0c\u5982\u679c\u60f3\u628a image file \u5199\u5230\u8f6f\u76d8\uff0c\u8f93\u5165\uff1a<\/p>\n<pre class=\"prettyprint prettyprinted\"><span class=\"pln\">cat IMG_FILE <\/span><span class=\"pun\">&gt;<\/span> <span class=\"str\">\/dev\/<\/span><span class=\"pln\">fd0<\/span><\/pre>\n<p>cat\u8fd8\u6709\u7ed3\u5408EOF\u7684\u9ad8\u7ea7\u7528\u6cd5\uff0c\u5e38\u7528\u4e8eshell\u811a\u672c\u7f16\u7a0b\u4e2d\uff0c\u6709\u5174\u8da3\u53ef\u4ee5\u4e86\u89e3\u4e0b\u3002\u8fd8\u6709more\u3001less\u7b49\u547d\u4ee4\u3002<\/p>\n<p><b>\u6ce8<\/b>\uff1a<\/p>\n<ul>\n<li>1. OUTFILE \u6307\u8f93\u51fa\u7684\u955c\u50cf\u6587\u4ef6\u540d\u3002<\/li>\n<li>2. IMG_FILE \u6307\u955c\u50cf\u6587\u4ef6\u3002<\/li>\n<li>3. \u82e5\u4ece\u955c\u50cf\u6587\u4ef6\u5199\u56de device \u65f6\uff0cdevice \u5bb9\u91cf\u9700\u4e0e\u76f8\u5f53\u3002<\/li>\n<li>4. \u901a\u5e38\u7528\u5236\u4f5c\u5f00\u673a\u78c1\u7247\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>cat\uff08\u82f1\u6587\u5168\u62fc\uff1aconcatenate\uff09\u547d\u4ee4\u7528\u4e8e\u8fde\u63a5\u6587\u4ef6\u5e76\u6253\u5370\u5230\u6807\u51c6\u8f93\u51fa\u8bbe\u5907\u4e0a\u3002\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u6709\u4e2dconcatenate\u7684\u7528\u6cd5\uff0c\u7528\u5904\u662f\u5c06\u591a\u4e2a\u6587\u5b57\u4e32\u5408\u5e76\u5230\u4e00\u4e2a\u6587\u5b57\u4e32\u4e2d\uff0clinux\u4e2dcat\u7684\u529f\u80fd\u662f\u5c06\u6587\u4ef6\u5185\u5bb9\u8f93\u51fa\u5230\u5176\u4ed6\u65b9\u5411\uff08\u7ec8\u7aef\u8f93\u51fa\u3001\u6587\u672c\u8f93\u51fa\uff09\u3002 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":122,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"topic":[37],"class_list":["post-138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux","topic-linux"],"_links":{"self":[{"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/posts\/138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=138"}],"version-history":[{"count":3,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/posts\/138\/revisions"}],"predecessor-version":[{"id":141,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/posts\/138\/revisions\/141"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/media\/122"}],"wp:attachment":[{"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=138"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftopic&post=138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}