{"id":197,"date":"2021-05-14T13:53:45","date_gmt":"2021-05-14T05:53:45","guid":{"rendered":"http:\/\/feel.name\/?p=197"},"modified":"2021-05-14T13:53:45","modified_gmt":"2021-05-14T05:53:45","slug":"linux%e6%96%b0%e6%89%8b%e7%9f%a5%e9%81%93%e7%9a%84%e6%a0%87%e5%87%86%e8%be%93%e5%85%a5%e6%a0%87%e5%87%86%e8%be%93%e5%87%ba%e5%92%8c%e6%a0%87%e5%87%86%e9%94%99%e8%af%af","status":"publish","type":"post","link":"http:\/\/feel.name\/?p=197","title":{"rendered":"linux\u65b0\u624b\u77e5\u9053\u7684\u6807\u51c6\u8f93\u5165\u6807\u51c6\u8f93\u51fa\u548c\u6807\u51c6\u9519\u8bef"},"content":{"rendered":"\n

\u5f53Linux\u6267\u884c\u4e00\u4e2a\u7a0b\u5e8f\u7684\u65f6\u5019\uff0c\u4f1a\u81ea\u52a8\u6253\u5f00\u4e09\u4e2a\u6d41\uff0c\u6807\u51c6\u8f93\u5165(standard input)\uff0c\u6807\u51c6\u8f93\u51fa(standard output)\uff0c\u6807\u51c6\u9519\u8bef(standard error)\u3002\u6bd4\u5982\u8bf4\u4f60\u6253\u5f00\u547d\u4ee4\u884c\u7684\u65f6\u5019\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u547d\u4ee4\u884c\u7684\u6807\u51c6\u8f93\u5165\u8fde\u63a5\u5230\u952e\u76d8\uff0c\u6807\u51c6\u8f93\u51fa\u548c\u6807\u51c6\u9519\u8bef\u90fd\u8fde\u63a5\u5230\u5c4f\u5e55\u3002\u5bf9\u4e8e\u4e00\u4e2a\u7a0b\u5e8f\u6765\u8bf4\uff0c\u5c3d\u7ba1\u5b83\u603b\u4f1a\u6253\u5f00\u8fd9\u4e09\u4e2a\u6d41\uff0c\u4f46\u5b83\u4f1a\u6839\u636e\u9700\u8981\u4f7f\u7528\uff0c\u5e76\u4e0d\u662f\u4e00\u5b9a\u8981\u4f7f\u7528\u3002<\/p>\n\n\n\n

\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u4f1a\u9ed8\u8ba4\u6253\u5f003\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u53730\u30011\u30012\u3002\u5176\u4e2d0\u4ee3\u8868\u6807\u51c6\u8f93\u5165\u6d41\u30011\u4ee3\u8868\u6807\u51c6\u8f93\u51fa\u6d41\u30012\u4ee3\u8868\u6807\u51c6\u9519\u8bef\u6d41\u3002\u901a\u5e38\u6807\u51c6\u8f93\u5165\u6d41\u5bf9\u5e94\u7740\u952e\u76d8\u7684\u8bbe\u5907\u6587\u4ef6\u3001\u6807\u51c6\u8f93\u51fa\u6d41\u548c\u9519\u8bef\u6d41\u5bf9\u5e94\u7740\u663e\u793a\u5668\u7684\u8bbe\u5907\u6587\u4ef6\u3002\u5728\u7f16\u7a0b\u4e2d\u901a\u5e38\u4f7f\u7528\u5b8fSTDIN_FILENO\u3001STDOUT_FILENO\u548cSTDERR_FILENO\u5206\u522b\u6765\u4ee3\u88680\uff0c1\uff0c2\u3002<\/p>\n\n\n\n

\u5047\u8bbe\u8bf4\u6211\u4eec\u4e0d\u60f3\u8ba9\u6587\u672c\u6d41\u6d41\u5230\u5c4f\u5e55\uff0c\u800c\u662f\u6d41\u5230\u53e6\u4e00\u4e2a\u6587\u4ef6\uff0c\u6211\u4eec\u53ef\u4ee5\u91c7\u7528\u91cd\u65b0\u5b9a\u5411(redirect)\u7684\u673a\u5236\u3002<\/p>\n\n\n\n

\u3000 \u6807\u51c6\u8f93\u51fa<\/strong>(standard output)\u548c \u6807\u51c6\u9519\u8bef(standard error), \u9ed8\u8ba4\u662f\u8fde\u63a5\u81f3\u5c4f\u5e55;<\/p>\n\n\n\n

\u3000\u3000\u6807\u51c6\u8f93\u5165<\/strong>(standard input) \u9ed8\u8ba4\u662f\u8fde\u63a5\u81f3\u952e\u76d8;<\/p>\n\n\n\n

\u3000\u3000\u53ef\u4ee5\u4f7f\u7528IO\u91cd\u5b9a\u5411(redirection), \u6539\u53d8\u8f93\u5165, \u8f93\u51fa\u7684\u53d1\u9001\u4f4d\u7f6e;<\/p>\n\n\n\n

\u3000\u30001. \u6807\u51c6\u8f93\u51fa<\/strong><\/p>\n\n\n\n

\u3000\u3000\u6807\u51c6\u8f93\u51fa\u91cd\u5b9a\u5411, \u4f7f\u7528\u91cd\u5b9a\u5411\u64cd\u4f5c\u7b26(“>”), \u628a\u7a0b\u5e8f\u8f93\u51fa\u81f3\u6587\u4ef6, \u9ed8\u8ba4\u662f\u4ece\u6587\u4ef6\u5934\u90e8\u91cd\u5199\u5199\u5165;<\/p>\n\n\n\n

\u3000\u3000\u53ef\u4ee5\u4f7f\u7528”> test.txt”,\u6e05\u7a7a\u6587\u672c\u4fe1\u606f;<\/p>\n\n\n\n

\u3000\u3000\u4f7f\u7528”>>”, \u5c06\u6587\u4ef6\u6dfb\u52a0\u81f3\u6587\u672c\u5c3e\u90e8;<\/p>\n\n\n\n

\u3000\u30002. \u6807\u51c6\u9519\u8bef<\/strong><\/p>\n\n\n\n

\u3000\u3000\u6807\u51c6\u9519\u8bef\u91cd\u5b9a\u5411, \u4f7f\u7528”2>”, \u8fdb\u884c\u8f93\u51fa, \u7531\u4e8e\u6587\u4ef6\u6d41\u5305\u542b\u4e09\u79cd, \u5373”\u8f93\u5165, \u8f93\u51fa, \u9519\u8bef”, \u5bf9\u5e94”0, 1, 2″;<\/p>\n\n\n\n

\u3000\u3000\u5373”>”, \u5373\u7b49\u4e8e”1>”, \u6807\u51c6\u8f93\u51fa;<\/p>\n\n\n\n

\u3000\u3000\u5904\u7406\u4e0d\u60f3\u8981\u7684\u9519\u8bef\u8f93\u51fa, \u4f7f\u7528”2> \/dev\/null”, \u9690\u85cf\u4e00\u4e2a\u547d\u4ee4\u7684’\u9519\u8bef\u4fe1\u606f.<\/p>\n\n\n\n

\u3000\u3000\u540c\u65f6\u663e\u793a\u8f93\u51fa\u548c\u9519\u8bef, \u6807\u51c6\u9519\u8bef\u662f\u540e\u4e8e\u6807\u51c6\u8f93\u51fa\u4ea7\u751f, \u5373\u8981\u5148\u4f7f\u7528”>”, \u518d\u4f7f\u7528”2>&1″, \u547d\u4ee4:”xxxx > xxxx 2>&1″;<\/p>\n\n\n\n

\u3000\u3000\u4e5f\u53ef\u4ee5\u4f7f\u7528”&>”, \u76f4\u63a5\u8f93\u51fa\u6807\u51c6\u8f93\u51fa\u548c\u9519\u8bef, \u547d\u4ee4:”xxxx &> xxxx”, \u8f83\u65b0\u7248bash\u63d0\u4f9b.<\/p>\n\n\n\n

\u3000\u3000\u5982\u56fe:<\/p>\n\n\n\n

\u3000\u30003. \u6807\u51c6\u8f93\u5165:<\/strong><\/p>\n\n\n\n

\u3000\u3000cat\u547d\u4ee4(ConcATenate), \u672c\u610f\u662f\u94fe\u63a5\u6587\u4ef6, cat xxxx[1] xxxx … > xxxx[end];<\/p>\n\n\n\n

\u3000\u30001. \u5982\u679c\u53ea\u4f7f\u7528\u7b2c\u4e00\u4e2a\u53c2\u6570, \u5373\u628a\u4fe1\u606f\u8f93\u51fa\u81f3\u5c4f\u5e55, \u53ef\u4ee5\u8f93\u51fa\u77ed\u7684\u6587\u4ef6, \u4e0d\u4f1a\u6362\u884c;<\/p>\n\n\n\n

\u3000\u30002. \u5982\u679c\u53ea\u4f7f\u7528cat, \u5219\u4ece\u952e\u76d8\u83b7\u53d6\u4fe1\u606f, \u8f93\u51fa\u81f3\u5c4f\u5e55;<\/p>\n\n\n\n

\u3000\u30003. \u5982\u679c\u53ea\u4f7f\u7528\u6700\u540e\u4e00\u4e2a\u53c2\u6570, \u5373cat > xxxx, \u5373\u4ece\u952e\u76d8\u8f93\u5165, \u5b58\u50a8\u5165\u6587\u4ef6;<\/p>\n\n\n\n

\u3000\u30004. \u5982\u679c\u90fd\u4f7f\u7528, \u5219\u662f\u8fde\u63a5\u6587\u4ef6, \u628a\u6587\u4ef6\u987a\u6b21\u8fde\u63a5, \u5e76\u5b58\u5165\u7ed3\u5c3e\u6587\u4ef6;<\/p>\n\n\n\n

\u3000\u30005. \u53ef\u4ee5\u4f7f\u7528”<“, \u5373”cat < xxxx”, \u5219\u662f\u91cd\u5b9a\u5411, \u628a\u8f93\u5165\u7684\u6e90, \u53d8\u4e3a\u6587\u4ef6, \u548c\u76f4\u63a5\u8f93\u5165\u6587\u4ef6\u610f\u4e49\u76f8\u540c.<\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5f53Linux\u6267\u884c\u4e00\u4e2a\u7a0b\u5e8f\u7684\u65f6\u5019\uff0c\u4f1a\u81ea\u52a8\u6253\u5f00\u4e09\u4e2a\u6d41\uff0c\u6807\u51c6\u8f93\u5165(standard input)\uff0c\u6807\u51c6\u8f93\u51fa(stan…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-197","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"http:\/\/feel.name\/index.php?rest_route=\/wp\/v2\/posts\/197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/feel.name\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/feel.name\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/feel.name\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/feel.name\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=197"}],"version-history":[{"count":1,"href":"http:\/\/feel.name\/index.php?rest_route=\/wp\/v2\/posts\/197\/revisions"}],"predecessor-version":[{"id":198,"href":"http:\/\/feel.name\/index.php?rest_route=\/wp\/v2\/posts\/197\/revisions\/198"}],"wp:attachment":[{"href":"http:\/\/feel.name\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/feel.name\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=197"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/feel.name\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}