{"id":160,"date":"2017-11-16T00:54:08","date_gmt":"2017-11-15T16:54:08","guid":{"rendered":"http:\/\/www.wuchangsong.com\/?p=160"},"modified":"2017-11-16T00:54:08","modified_gmt":"2017-11-15T16:54:08","slug":"sed%ef%bc%8cawk","status":"publish","type":"post","link":"http:\/\/www.wuchangsong.com\/?p=160","title":{"rendered":"sed\uff0cawk"},"content":{"rendered":"<h3>sed\u5de5\u5177<\/h3>\n<p>sed\u672c\u8eab\u4e5f\u662f\u4e00\u4e2a\u7ba1\u9053\u547d\u4ee4\uff0c\u53ef\u4ee5\u5206\u6790standard input\u7684\uff0c\u800c\u4e14sed\u8fd8\u53ef\u4ee5\u5c06\u6570\u636e\u8fdb\u884c\u66ff\u6362\u3001\u5220\u9664\u3001\u65b0\u589e\u3001\u9009\u53d6\u7279\u5b9a\u884c\u7b49\u7684\u529f\u80fd\u3002<br \/>\n\u7528\u6cd5\uff1ased [-nefr] \u52a8\u4f5c<\/p>\n<pre>\u53c2\u6570\uff1a\r\n-n\uff1a\u4f7f\u7528\u5b89\u9759\u6a21\u5f0f\u3002\u5728\u4e00\u822csed\u7684\u7528\u6cd5\u4e2d\uff0c\u6240\u6709\u6765\u81eastdin\u7684\u6570\u636e\u4e00\u822c\u90fd\u4f1a\u88ab\u5217\u51fa\u5230\u5c4f\u5e55\u4e0a\u3002\u4f46\u5982\u679c\u52a0\u4e0a-n\u53c2\u6570\u540e\uff0c\u5219\u53ea\u6709\u7ecf\u8fc7sed\u7279\u6b8a\u5904\u7406\u7684\u90a3\u4e00\u884c\uff08\u6216\u8005\u64cd\u4f5c\uff09\u624d\u4f1a\u88ab\u5217\u51fa\u3002\r\n-e\uff1a\u76f4\u63a5\u5728\u547d\u4ee4\u884c\u6a21\u5f0f\u4e0a\u8fdb\u884csed\u7684\u52a8\u4f5c\u7f16\u8f91\u3002\r\n-f\uff1a\u76f4\u63a5\u5c06sed\u7684\u52a8\u4f5c\u5199\u5728\u4e00\u4e2a\u6587\u4ef6\u5185\uff0c-f filename\u5219\u53ef\u4ee5\u6267\u884cfilename\u5185\u7684sed\u52a8\u4f5c\u3002\r\n-r\uff1ased\u7684\u52a8\u4f5c\u652f\u6301\u7684\u662f\u6269\u5c55\u578b\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\uff08\u9ed8\u8ba4\u662f\u57fa\u7840\u6b63\u5219\u8868\u8fbe\u5f0f\u8bed\u6cd5\uff09\u3002\r\n-i\uff1a\u76f4\u63a5\u4fee\u6539\u8bfb\u53d6\u7684\u6587\u4ef6\u5185\u5bb9\uff0c\u800c\u4e0d\u662f\u5c4f\u5e55\u8f93\u51fa\u3002\r\n\u52a8\u4f5c\u8bf4\u660e\uff1a[n1[,n2]]function\r\nn1,n2:\u4e0d\u89c1\u5f97\u4f1a\u5b58\u5728\uff0c\u4e00\u822c\u4ee3\u8868\u9009\u62e9\u8fdb\u884c\u52a8\u4f5c\u7684\u884c\u6570\uff0c\u4e3e\u4f8b\u6765\u8bf4\uff0c\u5982\u679c\u6211\u7684\u52a8\u4f5c\u662f\u9700\u8981\u572810\u523020\u884c\u4e4b\u95f4\u8fdb\u884c\u7684\uff0c\u5219\u201810,20[\u52a8\u4f5c\u884c\u4e3a]\u2019\r\nfunction\u6709\u4e0b\u9762\u8fd9\u4e9b\u53c2\u6570\uff1a\r\na\uff1a\u65b0\u589e\uff0ca\u7684\u540e\u9762\u53ef\u4ee5\u63a5\u5b57\u7b26\u4e32\uff0c\u800c\u8fd9\u4e9b\u5b57\u7b26\u4e32\u4f1a\u5728\u65b0\u7684\u4e00\u884c\u51fa\u73b0\uff08\u76ee\u524d\u7684\u4e0b\u4e00\u884c\uff09\uff1b\r\nc\uff1a\u66ff\u6362\uff0cc\u7684\u540e\u9762\u53ef\u4ee5\u63a5\u5b57\u7b26\u4e32\uff0c\u8fd9\u4e9b\u5b57\u7b26\u4e32\u53ef\u4ee5\u66ff\u6362n1\uff0cn2\u4e4b\u95f4\u7684\u884c\uff1b\r\nd\uff1a\u5220\u9664\uff0c\u56e0\u4e3a\u662f\u5220\u9664\uff0c\u6240\u4ee5d\u540e\u9762\u901a\u5e38\u4e0d\u63a5\u4efb\u4f55\u53c2\u6570\uff1b\r\ni\uff1a\u63d2\u5165\uff0ci\u7684\u540e\u9762\u53ef\u4ee5\u63a5\u5b57\u7b26\u4e32\uff0c\u800c\u8fd9\u4e9b\u5b57\u7b26\u4e32\u4f1a\u5728\u65b0\u7684\u4e00\u884c\u51fa\u73b0\uff08\u76ee\u524d\u7684\u4e0a\u4e00\u884c\uff09\uff1b\r\np\uff1a\u6253\u5370\uff0c\u5c06\u67d0\u4e2a\u9009\u62e9\u7684\u6570\u636e\u6253\u5370\u51fa\u6765\u3002\u901a\u5e38p\u4f1a\u4e0e\u53c2\u6570sed -n\u4e00\u8d77\u8fd0\u884c\uff1b\r\ns\uff1a\u66ff\u6362\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u66ff\u6362\u5de5\u4f5c\u3002\u901a\u5e38\u8fd9\u4e2as\u7684\u52a8\u4f5c\u53ef\u4ee5\u642d\u914d\u6b63\u5219\u8868\u8fbe\u5f0f\u3002\r\n<\/pre>\n<p>\u4f8b\u4e00\uff1a\u5220\u9664\u7b2c2\u52305\u884c<br \/>\n<img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-162\" src=\"http:\/\/www.wuchangsong.com\/wp-content\/uploads\/2017\/11\/QQ\u56fe\u724720171115231927.png\" alt=\"\" width=\"476\" height=\"105\" \/><br \/>\n\u6ce8\u610fsed\u540e\u9762\u63a5\u7684\u52a8\u4f5c\uff0c\u52a1\u5fc5\u4ee5&#8221;\u4e24\u4e2a\u5355\u5f15\u53f7\u62ec\u4f4f\uff01<\/p>\n<p>\u5982\u679c\u4f53\u578b\u53d8\u6362\u4e00\u4e0b\uff0c\u5220\u9664\u7b2c\u4e09\u5230\u6700\u540e\u4e00\u884c\uff0c\u5219\u662f\u2018nl \/etc\/passwd | sed &#8216;3,$d&#8217;\u2019\uff0c\u8fd9\u4e2a$\u4ee3\u8868\u6700\u540e\u4e00\u884c\u3002<\/p>\n<p>\u4f8b\u4e8c\uff1a\u5c06\u7b2c2~5\u884c\u7684\u5185\u5bb9\u66ff\u6362\u6210\u4e3a\u2018No 2-5 number\u2019<br \/>\n<img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-163\" src=\"http:\/\/www.wuchangsong.com\/wp-content\/uploads\/2017\/11\/QQ\u56fe\u724720171115233040.png\" alt=\"\" width=\"546\" height=\"81\" \/><\/p>\n<p>sed \u53e6\u4e00\u4e2a\u5f3a\u5927\u7684\u7528\u6cd5\uff0c\u90e8\u5206\u6570\u636e\u7684\u67e5\u627e\u5e76\u66ff\u6362\uff1ased &#8216;s\/\u8981\u88ab\u66ff\u6362\u7684\u5b57\u7b26\u4e32\/\u65b0\u7684\u5b57\u7b26\u4e32\/g&#8217;<\/p>\n<h3>awk:\u597d\u7528\u7684\u6570\u636e\u5904\u7406\u5de5\u5177<\/h3>\n<p>\u76f8\u6bd4\u4e8esed\u5e38\u5e38\u4f5c\u7528\u4e8e\u4e00\u6574\u884c\u7684\u5904\u7406\uff0cawk\u5219\u6bd4\u8f83\u503e\u5411\u4e8e\u5c06\u4e00\u884c\u5206\u6210\u6570\u4e2a\u2018\u5b57\u6bb5\u2019\u6765\u5904\u7406\u3002\u56e0\u6b64\u3002awk\u9002\u5408\u5c0f\u578b\u7684\u6570\u636e\u5904\u7406<br \/>\n\u7528\u6cd5\uff1aawk &#8216;\u6761\u4ef6\u7c7b\u578b 1{\u52a8\u4f5c 1} \u6761\u4ef6\u7c7b\u578b 2{\u52a8\u4f5c 2} &#8230;&#8217; filename<br \/>\nawk\u7684\u5904\u7406\u6d41\u7a0b\uff1a<\/p>\n<ol>\n<li>\u8bfb\u5165\u7b2c\u4e00\u884c\uff0c\u5e76\u5c06\u7b2c\u4e00\u884c\u7684\u6570\u636e\u586b\u5165$0,$1,$2\u7b49\u53d8\u91cf\u5f53\u4e2d\uff1b<\/li>\n<li>\u4f9d\u636e\u6761\u4ef6\u7c7b\u578b\u7684\u9650\u5236\uff0c\u5224\u65ad\u662f\u5426\u9700\u8981\u8fdb\u884c\u540e\u9762\u7684\u52a8\u4f5c\uff1b<\/li>\n<li>\u505a\u5b8c\u6240\u6709\u7684\u52a8\u4f5c\u4e0e\u6761\u4ef6\u7c7b\u578b\uff1b<\/li>\n<li>\u82e5\u8fd8\u6709\u540e\u7eed\u7684\u2018\u884c\u2019\u7684\u6570\u636e\uff0c\u5219\u91cd\u590d\u4e0a\u97621-3\u7684\u6b65\u9aa4\uff0c\u76f4\u5230\u6240\u6709\u7684\u6570\u636e\u90fd\u8bfb\u5b8c\u4e3a\u6b62\u3002<\/li>\n<\/ol>\n<p>\u53d8\u91cf\u540d\u5b57\u53ca\u610f\u4e49\uff1a<\/p>\n<ul>\n<li>NF\uff1a\u6bcf\u4e00\u884c\uff08$0\uff09\u62e5\u6709\u7684\u5b57\u6bb5\u603b\u6570<\/li>\n<li>NR\uff1a\u76ee\u524dawk\u6240\u5904\u7406\u7684\u662f\u2018\u7b2c\u51e0\u884c\u2019\u6570\u636e<\/li>\n<li>FS\uff1a\u76ee\u524d\u7684\u5206\u5272\u5b57\u7b26\uff0c\u9ed8\u8ba4\u662f\u7a7a\u683c<\/li>\n<\/ul>\n<p>\u4f8b\uff1aawk\u7684\u903b\u8f91\u8fd0\u7b97<\/p>\n<p>\u6570\u636e\uff1a<img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-164\" src=\"http:\/\/www.wuchangsong.com\/wp-content\/uploads\/2017\/11\/QQ\u56fe\u724720171116003503.png\" alt=\"\" width=\"329\" height=\"83\" \/><br \/>\n\u5904\u7406\uff1a<img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-165\" src=\"http:\/\/www.wuchangsong.com\/wp-content\/uploads\/2017\/11\/QQ\u56fe\u724720171116004543.png\" alt=\"\" width=\"640\" height=\"130\" \/><\/p>\n<ul>\n<li>\u7b2c\u4e00\u884c\u53ea\u662f\u8bf4\u660e\uff0c\u6240\u4ee5\u7b2c\u4e00\u884c\u4e0d\u8981\u8fdb\u884c\u52a0\u603b\uff08NR==1\u65f6\u5904\u7406\uff09<\/li>\n<li>\u7b2c\u4e8c\u884c\u4ee5\u540e\u5c31\u4f1a\u6709\u52a0\u603b\u7684\u60c5\u51b5\uff08NR&gt;=2\u4ee5\u540e\u5904\u7406\uff09<\/li>\n<li>\u7b2c\u4e09\u884c\u5c06\u5904\u7406\u540e\u7684\u7ed3\u679c\u683c\u5f0f\u8f93\u51fa<\/li>\n<li>\u6240\u6709\u7684awk\u52a8\u4f5c\uff0c\u5373\u5728{}\u5185\u7684\u52a8\u4f5c\uff0c\u5982\u679c\u6709\u9700\u8981\u591a\u4e2a\u547d\u4ee4\u8f85\u52a9\u65f6\uff0c\u53ef\u5229\u7528\u5206\u53f7\u201c\uff1b\u201d\u95f4\u9694\uff0c\u6216\u8005\u76f4\u63a5\u4ee5enter\u952e\u6765\u9694\u5f00\u6bcf\u4e2a\u547d\u4ee4<\/li>\n<li>\u903b\u8f91\u8fd0\u7b97\u4e2d\uff0c\u5982\u679c\u662f\u201c\u7b49\u4e8e\u201d\u7684\u60c5\u51b5\uff0c\u52a1\u5fc5\u4f7f\u7528\u4e24\u4e2a\u7b49\u53f7\u201c==\u201d<\/li>\n<li>\u4e0ebash\u3001shell\u7684\u53d8\u91cf\u4e0d\u540c\uff0c\u5728awk\u4e2d\uff0c\u53d8\u91cf\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\uff0c\u4e0d\u9700\u8981\u52a0\u4e0a$\u7b26\u53f7<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>\u4ee5\u4e0a\u5185\u5bb9\u6458\u81ea\u300a\u9e1f\u54e5\u7684\u79c1\u623f\u83dc\u300b\u7b2c\u4e09\u7248 \u57fa\u7840\u5b66\u4e60\u7bc7<\/p>\n","protected":false},"excerpt":{"rendered":"<p>sed\u5de5\u5177 sed\u672c\u8eab\u4e5f\u662f\u4e00\u4e2a\u7ba1\u9053\u547d\u4ee4\uff0c\u53ef\u4ee5\u5206\u6790standard input\u7684\uff0c\u800c\u4e14sed\u8fd8\u53ef\u4ee5\u5c06\u6570\u636e\u8fdb\u884c\u66ff\u6362\u3001\u5220\u9664\u3001\u65b0\u589e\u3001\u9009\u53d6\u7279\u5b9a\u884c\u7b49\u7684\u529f\u80fd\u3002 \u7528\u6cd5\uff1ased [-nefr] \u52a8\u4f5c \u53c2\u6570\uff1a -n\uff1a\u4f7f\u7528\u5b89\u9759\u6a21\u5f0f\u3002\u5728\u4e00\u822csed\u7684\u7528\u6cd5\u4e2d\uff0c\u6240\u6709\u6765\u81eastdin\u7684\u6570\u636e\u4e00\u822c\u90fd\u4f1a\u88ab\u5217\u51fa\u5230\u5c4f\u5e55\u4e0a\u3002\u4f46\u5982\u679c\u52a0\u4e0a-n\u53c2\u6570\u540e\uff0c\u5219\u53ea\u6709\u7ecf\u8fc7sed\u7279\u6b8a\u5904\u7406\u7684\u90a3\u4e00\u884c\uff08\u6216\u8005\u64cd\u4f5c\uff09\u624d\u4f1a\u88ab\u5217\u51fa\u3002 -e\uff1a\u76f4\u63a5\u5728\u547d\u4ee4\u884c\u6a21\u5f0f\u4e0a\u8fdb\u884csed\u7684\u52a8\u4f5c\u7f16\u8f91\u3002 -f\uff1a\u76f4\u63a5\u5c06sed\u7684\u52a8\u4f5c\u5199\u5728\u4e00\u4e2a\u6587\u4ef6\u5185\uff0c-f filename\u5219\u53ef\u4ee5\u6267\u884cfilename\u5185\u7684sed\u52a8\u4f5c\u3002 -r\uff1ased\u7684\u52a8\u4f5c\u652f\u6301\u7684\u662f\u6269\u5c55\u578b\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\uff08\u9ed8\u8ba4\u662f\u57fa\u7840\u6b63\u5219\u8868\u8fbe\u5f0f\u8bed\u6cd5\uff09\u3002 -i\uff1a\u76f4\u63a5\u4fee\u6539\u8bfb\u53d6\u7684\u6587\u4ef6\u5185\u5bb9\uff0c\u800c\u4e0d\u662f\u5c4f\u5e55\u8f93\u51fa\u3002 \u52a8\u4f5c\u8bf4\u660e\uff1a[n1[,n2]]function n1,n2:\u4e0d\u89c1\u5f97\u4f1a\u5b58\u5728\uff0c\u4e00\u822c\u4ee3\u8868\u9009\u62e9\u8fdb\u884c\u52a8\u4f5c\u7684\u884c\u6570\uff0c\u4e3e\u4f8b\u6765\u8bf4\uff0c\u5982\u679c\u6211\u7684\u52a8\u4f5c\u662f\u9700\u8981\u572810\u523020\u884c\u4e4b\u95f4\u8fdb\u884c\u7684\uff0c\u5219\u201810,20[\u52a8\u4f5c\u884c\u4e3a]\u2019 function\u6709\u4e0b\u9762\u8fd9\u4e9b\u53c2\u6570\uff1a a\uff1a\u65b0\u589e\uff0ca\u7684\u540e\u9762\u53ef\u4ee5\u63a5\u5b57\u7b26\u4e32\uff0c\u800c\u8fd9\u4e9b\u5b57\u7b26\u4e32\u4f1a\u5728\u65b0\u7684\u4e00\u884c\u51fa\u73b0\uff08\u76ee\u524d\u7684\u4e0b\u4e00\u884c\uff09\uff1b c\uff1a\u66ff\u6362\uff0cc\u7684\u540e\u9762\u53ef\u4ee5\u63a5\u5b57\u7b26\u4e32\uff0c\u8fd9\u4e9b\u5b57\u7b26\u4e32\u53ef\u4ee5\u66ff\u6362n1\uff0cn2\u4e4b\u95f4\u7684\u884c\uff1b d\uff1a\u5220\u9664\uff0c\u56e0\u4e3a\u662f\u5220\u9664\uff0c\u6240\u4ee5d\u540e\u9762\u901a\u5e38\u4e0d\u63a5\u4efb\u4f55\u53c2\u6570\uff1b i\uff1a\u63d2\u5165\uff0ci\u7684\u540e\u9762\u53ef\u4ee5\u63a5\u5b57\u7b26\u4e32\uff0c\u800c\u8fd9\u4e9b\u5b57\u7b26\u4e32\u4f1a\u5728\u65b0\u7684\u4e00\u884c\u51fa\u73b0\uff08\u76ee\u524d\u7684\u4e0a\u4e00\u884c\uff09\uff1b p\uff1a\u6253\u5370\uff0c\u5c06\u67d0\u4e2a\u9009\u62e9\u7684\u6570\u636e\u6253\u5370\u51fa\u6765\u3002\u901a\u5e38p\u4f1a\u4e0e\u53c2\u6570sed -n\u4e00\u8d77\u8fd0\u884c\uff1b s\uff1a\u66ff\u6362\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u66ff\u6362\u5de5\u4f5c\u3002\u901a\u5e38\u8fd9\u4e2as\u7684\u52a8\u4f5c\u53ef\u4ee5\u642d\u914d\u6b63\u5219\u8868\u8fbe\u5f0f\u3002 \u4f8b\u4e00\uff1a\u5220\u9664\u7b2c2\u52305\u884c \u6ce8\u610fsed\u540e\u9762\u63a5\u7684\u52a8\u4f5c\uff0c\u52a1\u5fc5\u4ee5&#8221;\u4e24\u4e2a\u5355\u5f15\u53f7\u62ec\u4f4f\uff01 \u5982\u679c\u4f53\u578b\u53d8\u6362\u4e00\u4e0b\uff0c\u5220\u9664\u7b2c\u4e09\u5230\u6700\u540e\u4e00\u884c\uff0c\u5219\u662f\u2018nl \/etc\/passwd | sed 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