{"id":852,"date":"2023-12-18T14:06:23","date_gmt":"2023-12-18T06:06:23","guid":{"rendered":"http:\/\/22pig.com\/?p=852"},"modified":"2023-12-18T14:06:24","modified_gmt":"2023-12-18T06:06:24","slug":"%e6%96%87%e4%bb%b6linux%e8%8e%b7%e5%8f%96%e6%96%87%e4%bb%b6%e7%ac%ac%e4%b8%80%e8%a1%8c%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%88head%e3%80%81sed%e4%bb%a5%e5%8f%8aawk%ef%bc%8ccut%ef%bc%89","status":"publish","type":"post","link":"http:\/\/22pig.com\/?p=852","title":{"rendered":"\u6587\u4ef6Linux\u83b7\u53d6\u6587\u4ef6\u7b2c\u4e00\u884c\u7684\u65b9\u6cd5\uff08head\u3001sed\u4ee5\u53caawk\uff0ccut\uff09"},"content":{"rendered":"\n

\u6587\u4ef6Linux\u83b7\u53d6\u6587\u4ef6\u7b2c\u4e00\u884c\u7684\u7b80\u4fbf\u65b9\u6cd5<\/p>\n\n\n\n

Linux\u6587\u4ef6\u7684\u64cd\u4f5c\u662f\u4f7f\u7528Linux\u7684\u57fa\u672c\u4efb\u52a1\u4e4b\u4e00\uff0c\u800c\u83b7\u53d6\u6587\u4ef6\u7b2c\u4e00\u884c\u662f\u6bd4\u8f83\u5e38\u89c1\u7684\u4efb\u52a1\uff0c\u53ef\u4ee5\u5229\u7528head\u6216\u8005sed\u547d\u4ee4\u5b8c\u6210\u3002\u672c\u6587\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528head\u3001sed\u4ee5\u53caawk\u547d\u4ee4\u83b7\u53d6\u6587\u4ef6\u7b2c\u4e00\u884c\u3001\u4e00\u5b9a\u5b57\u6bb5\u7684\u6587\u4ef6\u7b2c\u4e00\u884c\uff0c\u4ee5\u53ca\u591a\u884c\u6587\u672c\u5728\u6307\u5b9a\u4f4d\u7f6e\u524d\u83b7\u53d6\u7b2c\u4e00\u884c\u3002<\/p>\n\n\n\n

\u7b2c\u4e00\u79cd\u65b9\u6cd5\u4f7f\u7528head -n 1 \u547d\u4ee4 \uff0c\u4f8b\u5982\uff1ahead -n 1 filename<\/p>\n\n\n\n

\u5176\u4e2dfilename\u4e3a\u6307\u5b9a\u7684\u6587\u4ef6\uff0c\u8be5\u547d\u4ee4\u5c06\u8f93\u51fa\u6587\u4ef6\u7b2c\u4e00\u884c\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n

\u7b2c\u4e8c\u79cd\u65b9\u6cd5\u4f7f\u7528sed -n \u20181p\u2019 \u547d\u4ee4 \uff0c\u4f8b\u5982\uff1ased -n ‘1p’ filename<\/p>\n\n\n\n

\u548chead -n 1\u4e00\u6837\uff0c\u8be5\u547d\u4ee4\u4e5f\u5c06\u8f93\u51fa\u6587\u4ef6\u7b2c\u4e00\u884c\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n

\u7b2c\u4e09\u79cd\u65b9\u6cd5\u4f7f\u7528awk \u2018NR==1 {print $0}\u2019 \uff0c\u4f8b\u5982\uff1aawk ‘NR==1 {print $0}’ filename<\/p>\n\n\n\n

\u8be5\u547d\u4ee4\u53ef\u4ee5\u5c06\u6587\u4ef6\u4e2d\u7684\u7b2c\u4e00\u884c\u8f93\u51fa\uff0cNR\u7528\u4e8e\u7edf\u8ba1\u884c\u53f7\uff0c\u5176\u4e2d\u7684$0\u4ee3\u8868\u7684\u662f\u8f93\u51fa\u5168\u6587\u4ef6\u7684\u7b2c\u4e00\u884c\u5185\u5bb9\u3002<\/p>\n\n\n\n

\u6b64\u5916\u8fd8\u53ef\u4ee5\u4f7f\u7528awk \u547d\u4ee4\u63d0\u53d6\u67d0\u4e00\u5b57\u6bb5\uff1aawk \u2018NR==1 {print $1,$2}\u2019 filename<\/p>\n\n\n\n

\u8fd9\u4e00\u884c\u547d\u4ee4\u5c31\u53ef\u4ee5\u5c06\u6587\u4ef6\u7b2c\u4e00\u884c\u4e2d\uff0c\u67d0\u4e9b\u5b57\u6bb5\u8f93\u51fa\uff0c\u6bd4\u5982\u7b2c\u4e00\u548c\u7b2c\u4e8c\u4e2a\u5b57\u6bb5\u3002<\/p>\n\n\n\n

\u6700\u540e\uff0c\u4e5f\u53ef\u4ee5\u5728\u67d0\u4e00\u6307\u5b9a\u4f4d\u7f6e\u524d\u83b7\u53d6\u7b2c\u4e00\u884c\uff1ased -n ‘1,\/pattern\/p’ filename<\/p>\n\n\n\n

\u5176\u4e2d\uff0cpattern\u4e3a\u6307\u5b9a\u6587\u672c\uff0c\u6bd4\u5982\u53ef\u4ee5\u6307\u5b9a\u67d0\u4e00\u5355\u8bcd\u3001\u6587\u672c\u3001\u5b57\u7b26\u6216\u8005\u884c\u53f7\uff0c\u5728\u51fa\u73b0pattern\u524d\uff0c\u8f93\u51fa\u6807\u8bb0\u7684\u6587\u672c\u5185\u5bb9\u3002<\/p>\n\n\n\n

\u603b\u4e4b\uff0c\u4f7f\u7528head\u3001sed\u4ee5\u53caawk\u90fd\u53ef\u4ee5\u5b9e\u73b0\u83b7\u53d6Linux\u6587\u4ef6\u7684\u7b2c\u4e00\u884c\u7684\u76ee\u7684\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\uff0c\u9009\u62e9\u6070\u5f53\u7684\u547d\u4ee4\u6765\u5b9e\u73b0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u4ef6Linux\u83b7\u53d6\u6587\u4ef6\u7b2c\u4e00\u884c\u7684\u7b80\u4fbf\u65b9\u6cd5 Linux\u6587\u4ef6\u7684\u64cd\u4f5c\u662f\u4f7f\u7528Linux\u7684\u57fa\u672c\u4efb\u52a1\u4e4b\u4e00\uff0c\u800c\u83b7\u53d6\u6587\u4ef6\u7b2c\u4e00\u884c\u662f\u6bd4\u8f83\u5e38\u89c1\u7684\u4efb\u52a1\uff0c\u53ef\u4ee5\u5229\u7528head\u6216\u8005sed\u547d\u4ee4\u5b8c\u6210\u3002\u672c\u6587\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528head\u3001sed\u4ee5\u53caawk\u547d\u4ee4\u83b7\u53d6\u6587\u4ef6\u7b2c\u4e00\u884c\u3001\u4e00\u5b9a\u5b57\u6bb5\u7684\u6587\u4ef6\u7b2c\u4e00\u884c\uff0c\u4ee5\u53ca\u591a\u884c\u6587\u672c\u5728\u6307\u5b9a\u4f4d\u7f6e\u524d\u83b7\u53d6\u7b2c\u4e00\u884c\u3002 \u7b2c\u4e00\u79cd\u65b9\u6cd5\u4f7f\u7528head -n 1 \u547d\u4ee4 \uff0c\u4f8b\u5982\uff1ahead -n 1 filename \u5176\u4e2dfilename\u4e3a\u6307\u5b9a\u7684\u6587\u4ef6\uff0c\u8be5\u547d\u4ee4\u5c06\u8f93\u51fa\u6587\u4ef6\u7b2c\u4e00\u884c\u7684\u5185\u5bb9\u3002 \u7b2c\u4e8c\u79cd\u65b9\u6cd5\u4f7f\u7528sed -n \u20181p\u2019 \u547d\u4ee4 \uff0c\u4f8b\u5982\uff1ased -n ‘1p’ filename \u548chead -n 1\u4e00\u6837\uff0c\u8be5\u547d\u4ee4\u4e5f\u5c06\u8f93\u51fa\u6587\u4ef6\u7b2c\u4e00\u884c\u7684\u5185\u5bb9\u3002 \u7b2c\u4e09\u79cd\u65b9\u6cd5\u4f7f\u7528awk \u2018NR==1 {print $0}\u2019 \uff0c\u4f8b\u5982\uff1aawk ‘NR==1 {print $0}’ filename \u8be5\u547d\u4ee4\u53ef\u4ee5\u5c06\u6587\u4ef6\u4e2d\u7684\u7b2c\u4e00\u884c\u8f93\u51fa\uff0cNR\u7528\u4e8e\u7edf\u8ba1\u884c\u53f7\uff0c\u5176\u4e2d\u7684$0\u4ee3\u8868\u7684\u662f\u8f93\u51fa\u5168\u6587\u4ef6\u7684\u7b2c\u4e00\u884c\u5185\u5bb9\u3002 \u6b64\u5916\u8fd8\u53ef\u4ee5\u4f7f\u7528awk \u547d\u4ee4\u63d0\u53d6\u67d0\u4e00\u5b57\u6bb5\uff1aawk \u2018NR==1 {print $1,$2}\u2019 filename \u8fd9\u4e00\u884c\u547d\u4ee4\u5c31\u53ef\u4ee5\u5c06\u6587\u4ef6\u7b2c\u4e00\u884c\u4e2d\uff0c\u67d0\u4e9b\u5b57\u6bb5\u8f93\u51fa\uff0c\u6bd4\u5982\u7b2c\u4e00\u548c\u7b2c\u4e8c\u4e2a\u5b57\u6bb5\u3002 \u6700\u540e\uff0c\u4e5f\u53ef\u4ee5\u5728\u67d0\u4e00\u6307\u5b9a\u4f4d\u7f6e\u524d\u83b7\u53d6\u7b2c\u4e00\u884c\uff1ased -n ‘1,\/pattern\/p’ filename \u5176\u4e2d\uff0cpattern\u4e3a\u6307\u5b9a\u6587\u672c\uff0c\u6bd4\u5982\u53ef\u4ee5\u6307\u5b9a\u67d0\u4e00\u5355\u8bcd\u3001\u6587\u672c\u3001\u5b57\u7b26\u6216\u8005\u884c\u53f7\uff0c\u5728\u51fa\u73b0pattern\u524d\uff0c\u8f93\u51fa\u6807\u8bb0\u7684\u6587\u672c\u5185\u5bb9\u3002 \u603b\u4e4b\uff0c\u4f7f\u7528head\u3001sed\u4ee5\u53caawk\u90fd\u53ef\u4ee5\u5b9e\u73b0\u83b7\u53d6Linux\u6587\u4ef6\u7684\u7b2c\u4e00\u884c\u7684\u76ee\u7684\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\uff0c\u9009\u62e9\u6070\u5f53\u7684\u547d\u4ee4\u6765\u5b9e\u73b0\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-852","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/posts\/852","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/22pig.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=852"}],"version-history":[{"count":1,"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions"}],"predecessor-version":[{"id":853,"href":"http:\/\/22pig.com\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions\/853"}],"wp:attachment":[{"href":"http:\/\/22pig.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/22pig.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=852"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/22pig.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}