{"id":1161,"date":"2020-04-15T22:41:01","date_gmt":"2020-04-15T14:41:01","guid":{"rendered":"http:\/\/blog.ywdevops.cn\/?p=1161"},"modified":"2023-12-28T17:47:10","modified_gmt":"2023-12-28T09:47:10","slug":"awk","status":"publish","type":"post","link":"https:\/\/blog.ywdevops.cn\/index.php\/2020\/04\/15\/awk\/","title":{"rendered":"linux\u4e09\u5251\u5ba2\u4e4bawk\u547d\u4ee4"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">awk\u4e0esed\u76f8\u4f3c\uff0c\u90fd\u662f\u7528\u4f5c\u6587\u672c\u5904\u7406\uff0cawk\u7684\u57fa\u672c\u529f\u80fd\u4e5f\u662f\u641c\u7d22\u6587\u4ef6\u4e2d\u5305\u542b\u67d0\u4e9b\u6a21\u5f0f\u7684\u884c\uff0c\u5f53\u67d0\u884c\u5339\u914d\u4e00\u4e2a\u6a21\u5f0f\u65f6\uff0cawk\u5c31\u5728\u90a3\u4e00\u884c\u4e0a\u6267\u884c\u6307\u5b9a\u7684\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">awk\u8bed\u6cd5\u7531\u4e00\u4e2a\u6a21\u5f0f(pattern)\u540e\u9762\u8ddf\u4e00\u4e2a\u52a8\u4f5c(action)\u7ec4\u6210\uff0c\u5176\u4e2d<strong>\u52a8\u4f5c\u88ab\u5305\u62ec\u5728\u82b1\u62ec\u53f7<\/strong>\u5185\uff0c\u7528\u6765\u4e0e\u6a21\u5f0f\u5206\u79bb\uff0c\u6700\u540e\u52a0\u4e0a\u8f93\u5165\u7684\u6587\u4ef6\u540d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">awk\u6a21\u5f0f\u5339\u914d\u7ecf\u5e38\u7528\u5230\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u652f\u6301\u6240\u6709\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u5143\u5b57\u7b26\u4ee5\u53ca&#8221;?&#8221;\u548c&#8221;+&#8221; \u4e24\u4e2a\u6269\u5c55\u5143\u5b57\u7b26\uff0cgrep\u548csed\u5219\u4e0d\u652f\u6301&#8221;?&#8221; \u548c&#8221;+&#8221; \u6269\u5c55\u5143\u5b57\u7b26\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a\u5339\u914da.txt\u6587\u4ef6\u4e2d\u7684\u7a7a\u767d\u884c\u540e\u6253\u5370hello world\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"633\" height=\"213\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/29-1.png\" alt=\"\" class=\"wp-image-1164\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/29-1.png 633w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/29-1-300x101.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/29-1-600x202.png 600w\" sizes=\"auto, (max-width: 633px) 100vw, 633px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u547d\u4ee4\u4e2d\u4e3aawk\u7684\u7b2c\u4e00\u79cd\u8c03\u7528\u65b9\u5f0f\uff0c\u5355\u5f15\u53f7\u4e2d\u95f4\u7684\u662fawk\u547d\u4ee4\uff0c\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff0c\u901a\u8fc7\u7b26\u53f7\/\u5206\u5272\uff0c\u5176\u4e2d^$\u8868\u793a\u6a21\u5f0f\uff0c\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u82b1\u62ec\u53f7\u4e2d\u7684\u662f\u52a8\u4f5c\uff0cprint\u8868\u793a\u6253\u5370\u64cd\u4f5c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u79cd\u8c03\u7528\u65b9\u5f0f\u662f\u901a\u8fc7\u811a\u672c\u7684\u5f62\u5f0f\uff0c\u811a\u672c\u540d\u79f0test.awk \uff0c\u811a\u672c\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"596\" height=\"174\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/30-2.png\" alt=\"\" class=\"wp-image-1167\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/30-2.png 596w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/30-2-300x88.png 300w\" sizes=\"auto, (max-width: 596px) 100vw, 596px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"598\" height=\"216\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/31-1.png\" alt=\"\" class=\"wp-image-1168\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/31-1.png 598w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/31-1-300x108.png 300w\" sizes=\"auto, (max-width: 598px) 100vw, 598px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u79cd\u76f4\u63a5\u5c06\u6a21\u5f0f\u4ee5\u53ca\u52a8\u4f5c\u5199\u5165\u5230\u811a\u672c\u6587\u4ef6\u4e2d\uff0c\u7136\u540e\u901a\u8fc7awk  -f \u8fdb\u884c\u8c03\u7528\u5373\u53ef<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd8\u53ef\u4ee5\u901a\u8fc7\u7c7b\u4f3cshell\u811a\u672c\u7684\u5199\u6cd5\uff0c\u4ee5sha-bang\u7b26\u53f7\u5f00\u5934\uff0c\u540e\u9762\u63a5awk\u89e3\u91ca\u5668\u4f4d\u7f6e\uff0c\u89e3\u91ca\u5668\u53ef\u901a\u8fc7which awk\u67e5\u770b\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"593\" height=\"184\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/32-1.png\" alt=\"\" class=\"wp-image-1171\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/32-1.png 593w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/32-1-300x93.png 300w\" sizes=\"auto, (max-width: 593px) 100vw, 593px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ed9\u811a\u672c\u8d4b\u4e88\u6267\u884c\u6743\u9650chmod +x  test.awk , \u7136\u540e\u6267\u884c\u811a\u672c\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"589\" height=\"235\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/33-3.png\" alt=\"\" class=\"wp-image-1173\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/33-3.png 589w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/33-3-300x120.png 300w\" sizes=\"auto, (max-width: 589px) 100vw, 589px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>awk\u8bb0\u5f55\u548c\u57df<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">awk\u5bf9\u4e8e\u6bcf\u4e2a\u8f93\u5165\u6587\u4ef6\u884c\u5b9a\u4e49\u4e3a\u8bb0\u5f55\uff0c\u5bf9\u4e8e\u6587\u4ef6\u884c\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\u4e32\u5b9a\u4e49\u4e3a\u57df\uff0c\u57df\u4e4b\u95f4\u901a\u8fc7\u7a7a\u683c\u3001tab\u952e\u6216\u5176\u4ed6\u7b26\u53f7\u8fdb\u884c\u5206\u5272<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"594\" height=\"235\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/34-1.png\" alt=\"\" class=\"wp-image-1175\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/34-1.png 594w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/34-1-300x119.png 300w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u4e2d\u7b2c\u4e00\u4e2a\u57df\u4e3ahello\u3001\u7b2c\u4e8c\u4e2a\u57df\u4e3aworld\u3001\u7b2c\u4e09\u4e2a\u57df\u4e3ani\uff0c\u4ee5\u6b64\u7c7b\u63a8\uff0c\u901a\u8fc7$\u7b26\u53f7\u6765\u6307\u5b9a\u6267\u884c\u52a8\u4f5c\u7684\u57df\uff0c\u5982$1\u8868\u793a\u7b2c\u4e00\u4e2a\u57df\u3001$2\u8868\u793a\u7b2c\u4e8c\u4e2a\u57df\uff0c\u4ee5\u6b64\u7c7b\u63a8\uff0c$0\u8868\u793a\u6253\u5370\u6240\u6709\u57df<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1.\u4f8b\u5982\uff1a\u901a\u8fc7awk\u547d\u4ee4\uff0c\u6253\u5370\u57df\u503c\uff0c\u6309\u71676\u30015\u30014\u30013\u30012\u30011\u7684\u987a\u5e8f\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"603\" height=\"207\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/11-4.png\" alt=\"\" class=\"wp-image-1177\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/11-4.png 603w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/11-4-300x103.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/11-4-600x206.png 600w\" sizes=\"auto, (max-width: 603px) 100vw, 603px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u547d\u4ee4\u4e2dprint\u540e\u9762\u6253\u5370\u591a\u4e2a\u503c\u7684\u65f6\u5019\uff0c\u6bcf\u4e2a\u503c\u4e2d\u95f4\u7528\u9017\u53f7\u5206\u9694\u5373\u53ef<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. \u5982\u679c\u6253\u5370\u6240\u6709\u57df\uff0c\u53ef\u4ee5\u4f7f\u7528<strong>$0<\/strong>\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"590\" height=\"225\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/12-3.png\" alt=\"\" class=\"wp-image-1179\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/12-3.png 590w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/12-3-300x114.png 300w\" sizes=\"auto, (max-width: 590px) 100vw, 590px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">3. \u57df\u64cd\u4f5c\u7b26$ \u540e\u9762\u8fd8\u53ef\u4ee5\u8ddf\u53d8\u91cf\uff0c\u6216\u8005\u53d8\u91cf\u8fd0\u7b97\u8868\u8fbe\u5f0f\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"752\" height=\"198\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/13-3.png\" alt=\"\" class=\"wp-image-1180\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/13-3.png 752w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/13-3-300x79.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/13-3-600x158.png 600w\" sizes=\"auto, (max-width: 752px) 100vw, 752px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u547d\u4ee4\u4e2d\u5148\u7528BEGIN\u5b9a\u4e49\u53d8\u91cf\uff0cprint\u540e\u9762\u8ddf\u53d8\u91cf\u8868\u8fbe\u5f0f\uff0c\u56e0\u6b64\u5b9e\u9645awk\u6253\u5370\u7684\u662f\u7b2c3\u4e2a\u57df\u503c<\/p>\n\n\n\n<p class=\"has-pale-cyan-blue-background-color has-background wp-block-paragraph\">\u6ce8\u610f\uff1aBEGIN\u8bed\u53e5\u5728\u904d\u5386\u8f93\u5165\u6587\u672c\u4e4b\u524d\u6267\u884c\u7684\uff0c\u56e0\u6b64\u5148\u5b9a\u4e49\u53d8\u91cf\uff0c\u540e\u6267\u884c\u8868\u8fbe\u5f0f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4. \u4e0a\u56fe\u4e2d\u7684d.txt\u6587\u4ef6\u4e2d\u7684\u57df\u9ed8\u8ba4\u90fd\u662f\u7a7a\u683c\u8fdb\u884c\u5206\u5272\uff0c\u73b0\u5728\u5c06\u5185\u5bb9\u6539\u4e3a\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"584\" height=\"210\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/14-3.png\" alt=\"\" class=\"wp-image-1181\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/14-3.png 584w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/14-3-300x108.png 300w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230\uff0chello\u4e0eworld\u4e2d\u95f4\u901a\u8fc7\u5192\u53f7(:)\u8fdb\u884c\u5206\u5272\uff0c\u73b0\u5728\u6211\u4eec\u901a\u8fc7-F\u9009\u9879\u6307\u5b9a\u5206\u9694\u7b26\u6765\u6253\u5370\u57df\u503c\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"594\" height=\"247\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/15-3.png\" alt=\"\" class=\"wp-image-1182\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/15-3.png 594w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/15-3-300x125.png 300w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u4e2d\u901a\u8fc7-F\u6307\u5b9a\u5192\u53f7(:)\u4e3a\u5206\u9694\u7b26\uff0c\u6253\u5370\u7b2c\u4e00\u4e2a\u57df\u548c\u7b2c\u4e8c\u4e2a\u57df\u7684\u503c\uff0c\u53ef\u4ee5\u770b\u5230hello\u53d8\u4e3a\u4e86\u7b2c\u4e00\u4e2a\u57df\uff0c\u5176\u4f59\u51e0\u4e2a\u53d8\u6210\u4e86\u7b2c\u4e8c\u4e2a\u57df<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5. \u9664\u4e86-F\u9009\u9879\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528awk\u4e2d\u7684\u73af\u5883\u53d8\u91cfFS\u6765\u6539\u53d8\u5206\u9694\u7b26\uff0c\u901a\u8fc7\u5728BEGIN\u4e2d\u8bbe\u7f6eFS\u7684\u503c\u6765\u5b9a\u4e49\u5206\u9694\u7b26\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"630\" height=\"183\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/16-3.png\" alt=\"\" class=\"wp-image-1183\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/16-3.png 630w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/16-3-300x87.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/16-3-600x174.png 600w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u4e2d\u5728BEGIN\u4e2d\u6307\u5b9aFS\u4e3a\u5192\u53f7(:)\u4f5c\u4e3a\u5206\u9694\u7b26\uff0c\u5e76\u4e14\u6253\u5370\u7b2c2\u4e2a\u57df\uff0c\u6ce8\u610f\u5916\u5c42\u5355\u5f15\u53f7\u5185\u5c42\u4e3a\u53cc\u5f15\u53f7\uff0c\u56e0\u6b64FS\u4f4d\u7f6e\u4e3a\u53cc\u5f15\u53f7\uff0c\u5426\u5219\u62a5\u9519<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>\u5173\u7cfb\u548c\u5e03\u5c14\u8fd0\u7b97\u7b26<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">awk\u5b9a\u4e49\u4e86\u4e00\u7ec4\u5173\u7cfb\u8fd0\u7b97\u7b26\u7528\u4e8e\u6a21\u5f0f\u5339\u914d\uff0c\u8fd0\u7b97\u7b26\u53ca\u5176\u542b\u4e49\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u8fd0\u7b97\u7b26<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u542b\u4e49<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">&lt;<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5c0f\u4e8e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">&gt;<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5927\u4e8e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">&lt;=<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5c0f\u4e8e\u7b49\u4e8e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">&gt;=<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5927\u4e8e\u7b49\u4e8e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">==<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u7b49\u4e8e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">!=<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u4e0d\u7b49\u4e8e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">~<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5339\u914d\u6b63\u5219\u8868\u8fbe\u5f0f<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">!~<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u4e0d\u5339\u914d\u6b63\u5219\u8868\u8fbe\u5f0f<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u4f8b\u5b50\u4e2d\u4ee5\/etc\/passwd\u6587\u4ef6\u4f5c\u4e3a\u64cd\u4f5c\u5bf9\u8c61\u8fdb\u884c\u6f14\u793a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1.\u6253\u5370\/etc\/passwd\u4e2d\u7b2c\u4e00\u4e2a\u57df\u5339\u914droot\u7684\u8bb0\u5f55\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"696\" height=\"234\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/18-4.png\" alt=\"\" class=\"wp-image-1190\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/18-4.png 696w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/18-4-300x101.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/18-4-600x202.png 600w\" sizes=\"auto, (max-width: 696px) 100vw, 696px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u4e2d$1\u8868\u793a\u7b2c\u4e00\u4e2a\u57df\u7684\u503c\uff0c\u540e\u9762\u8868\u793a\u5339\u914droot\u8bb0\u5f55<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. \u6253\u5370\u5168\u90e8\u57df\u5339\u914droot\u7684\u8bb0\u5f55\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"693\" height=\"206\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/19-3.png\" alt=\"\" class=\"wp-image-1188\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/19-3.png 693w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/19-3-300x89.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/19-3-600x178.png 600w\" sizes=\"auto, (max-width: 693px) 100vw, 693px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u4e2d$0\u8868\u793a\u5168\u90e8\u57df\u4e2d\u5339\u914droot\u7684\u8bb0\u5f55<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3. \u6253\u5370\u6240\u6709\u57df\u4e2d\u4e0d\u5339\u914dnologin\u5173\u952e\u5b57\u7684\u8bb0\u5f55\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"735\" height=\"196\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/20-3.png\" alt=\"\" class=\"wp-image-1192\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/20-3.png 735w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/20-3-300x80.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/20-3-600x160.png 600w\" sizes=\"auto, (max-width: 735px) 100vw, 735px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">4. \u6253\u5370\u7b2c\u4e03\u4e2a\u57df\u5339\u914dbash\u7684\u8bb0\u5f55\u884c\u7684\u7b2c\u4e00\u4e2a\u57df\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"790\" height=\"208\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/21-4.png\" alt=\"\" class=\"wp-image-1193\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/21-4.png 790w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/21-4-300x79.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/21-4-768x202.png 768w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/21-4-600x158.png 600w\" sizes=\"auto, (max-width: 790px) 100vw, 790px\" \/><\/figure>\n\n\n\n<p class=\"has-pale-cyan-blue-background-color has-background wp-block-paragraph\">\u6ce8\u610f\uff1a\u5728\u4f7f\u7528\u8fd9\u4e9b\u8fd0\u7b97\u7b26\u7684\u65f6\u5019\uff0c\u5de6\u4fa7\u6307\u5b9a\u4e00\u4e2a\u53d8\u91cf\uff0c\u53f3\u4fa7\u6307\u5b9a\u6b63\u5219\u8868\u8fbe\u5f0f\u6216\u8005\u5b57\u7b26\u4e32<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5. awk\u5728\u8fdb\u884c\u6a21\u5f0f\u5339\u914d\u7684\u65f6\u5019\uff0c\u7ecf\u5e38\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\uff0c\u6709if\u3001if\/else\u3001if\/else else\u4e09\u79cd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a\u5339\u914d\u7b2c\u4e09\u4e2a\u57df\u7684\u503c\u5c0f\u4e8e\u7b2c\u56db\u4e2a\u57df\u7684\u503c\u7684\u6240\u6709\u8bb0\u5f55\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"785\" height=\"263\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/22-3.png\" alt=\"\" class=\"wp-image-1194\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/22-3.png 785w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/22-3-300x101.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/22-3-768x257.png 768w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/22-3-600x201.png 600w\" sizes=\"auto, (max-width: 785px) 100vw, 785px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>awk\u5e03\u5c14\u8fd0\u7b97\u7b26\u53ca\u5176\u542b\u4e49<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u8fd0\u7b97\u7b26<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u542b\u4e49<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">&amp;&amp;<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u903b\u8f91\u4e0e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">||<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u903b\u8f91\u6216<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\uff01<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u903b\u8f91\u975e<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">6. \u6253\u5370\u5339\u914d\u7b2c\u4e09\u4e2a\u57df\u6216\u8005\u7b2c\u56db\u4e2a\u57df\u7b49\u4e8e1\u7684\u6240\u6709\u57df\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"899\" height=\"232\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/23-4.png\" alt=\"\" class=\"wp-image-1196\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/23-4.png 899w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/23-4-300x77.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/23-4-768x198.png 768w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/23-4-600x155.png 600w\" sizes=\"auto, (max-width: 899px) 100vw, 899px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">7. \u6253\u5370\u7b2c\u4e09\u4e2a\u57df\u4e0d\u7b49\u4e8e8\u7684\u6240\u6709\u57df\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"801\" height=\"216\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/24-3.png\" alt=\"\" class=\"wp-image-1198\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/24-3.png 801w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/24-3-300x81.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/24-3-768x207.png 768w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/24-3-600x162.png 600w\" sizes=\"auto, (max-width: 801px) 100vw, 801px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">8.\u6253\u5370\u7b2c\u4e09\u4e2a\u57df\u4e0d\u7b49\u4e8e8\u5e76\u4e14\u7b2c\u56db\u4e2a\u57df\u4e0d\u7b49\u4e8e99\u7684\u6240\u6709\u884c\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"917\" height=\"209\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/25-3.png\" alt=\"\" class=\"wp-image-1199\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/25-3.png 917w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/25-3-300x68.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/25-3-768x175.png 768w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/25-3-600x137.png 600w\" sizes=\"auto, (max-width: 917px) 100vw, 917px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>awk\u8868\u8fbe\u5f0f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">awk\u8868\u8fbe\u5f0f\u7528\u4e8e\u5b58\u50a8\u3001\u64cd\u4f5c\u3001\u548c\u83b7\u53d6\u6570\u636e\uff0c\u8868\u8fbe\u5f0f\u53ef\u7531\u6570\u503c\u3001\u53d8\u91cf\u3001\u64cd\u4f5c\u7b26\u3001\u5b57\u7b26\u5e38\u91cf\u3001\u51fd\u6570\u3001\u4ee5\u53ca\u6b63\u5219\u8868\u8fbe\u5f0f\u81ea\u7531\u7ec4\u6210\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53d8\u91cf\u662f\u4e00\u4e2a\u503c\u7684\u6807\u8bc6\u7b26\uff0c\u5b9a\u4e49\u53d8\u91cfawk\u53d8\u91cf\u5f88\u65b9\u4fbf\uff0c\u53ea\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u540d\u5e76\u5c06\u503c\u8d4b\u503c\u7ed9\u5b83\u5373\u53ef\uff0c\u53d8\u91cf\u540d\u53ea\u80fd\u5305\u542b\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u4e0b\u5212\u7ebf\uff0c\u4f46\u662f\u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934\uff0c\u540c\u65f6\u53d8\u91cf\u540d\u662f\u533a\u5206\u5927\u5c0f\u5199\u7684\uff0c\u5b9a\u4e49awk\u53d8\u91cf\u65e0\u9700\u58f0\u660e\u53d8\u91cf\u7c7b\u578b\uff0c\u6bcf\u4e2a\u53d8\u91cf\u6709\u4e24\u79cd\u7c7b\u578b\u7684\u503c\uff1a\u5b57\u7b26\u4e32\u548c\u6570\u503c\uff0c\u53d8\u91cf\u7684\u9ed8\u8ba4\u6570\u503c\u4e3a0\uff0c\u9ed8\u8ba4\u5b57\u7b26\u4e32\u4e3a\u7a7a<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>awk\u7b97\u672f\u8868\u8fbe\u5f0f\u53ca\u5176\u542b\u4e49<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u8fd0\u7b97\u7b26<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u542b\u4e49<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">+<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u52a0<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">&#8211;<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u51cf<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">*<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u4e58<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\/<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u9664<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">%<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6a21<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">^\u6216**<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u4e58\u65b9<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">++x<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5728\u8fd4\u56dex\u503c\u4e4b\u524d\uff0cx\u53d8\u91cf\u52a01<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">x++<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5728\u8fd4\u56dex\u503c\u4e4b\u540e\uff0cx\u53d8\u91cf\u52a01<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">1.\u7edf\u8ba1\u6587\u4ef6a.txt\u4e2d\u7a7a\u767d\u884c\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"596\" height=\"206\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/11-5.png\" alt=\"\" class=\"wp-image-1224\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/11-5.png 596w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/11-5-300x104.png 300w\" sizes=\"auto, (max-width: 596px) 100vw, 596px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u547d\u4ee4\u8868\u793a\u5f53\u5339\u914d\u5230\u7a7a\u884c\u7684\u65f6\u5019\uff0c\u6267\u884c\u8868\u8fbe\u5f0fx+=1\uff0c\u4e5f\u5c31\u662fx=x+1\uff0c\u5e76\u6253\u5370\u8fd4\u56de\u503c\uff0c\u56fe\u4e2d\u8868\u793a\u6587\u4ef6\u6709\u4e09\u4e2a\u7a7a\u767d\u884c(\u9ed8\u8ba4x\u7684\u503c\u4ece0\u5f00\u59cb)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2.\u901a\u8fc7x++\u6216\u8005++x\u547d\u4ee4\u6765\u7edf\u8ba1\u6587\u4ef6\u4e2d\u7684\u7a7a\u767d\u884c\uff0c\u6267\u884c\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"590\" height=\"231\" src=\"http:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/12-4.png\" alt=\"\" class=\"wp-image-1225\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/12-4.png 590w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/12-4-300x117.png 300w\" sizes=\"auto, (max-width: 590px) 100vw, 590px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u547d\u4ee4\u4e2dx++\u8868\u793a\u8fd4\u56dex\u7684\u503c\u540e\uff0cx\u53d8\u91cf\u52a01\uff0cx\u7684\u521d\u59cb\u9ed8\u8ba4\u503c\u4e3a0<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"592\" height=\"219\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/8-2.png\" alt=\"\" class=\"wp-image-1227\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/8-2.png 592w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/8-2-300x111.png 300w\" sizes=\"auto, (max-width: 592px) 100vw, 592px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8ff0\u547d\u4ee4\u4e2d++x\u8868\u793ax\u53d8\u91cf\u5148\u52a01\u540e\uff0c\u518d\u8fd4\u56dex\u7684\u503c\uff0c\u56e0\u6b64\u6253\u5370\u51fa\u6765\u7684\u503c\u90fd\u4f1a\u52a01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u811a\u672c\u8ba1\u7b97\u5e73\u5747\u503c\uff1a\u73b0\u6709\u4e00\u4e2a\u6587\u4ef6aa.txt\uff0c\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"590\" height=\"240\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/9-4.png\" alt=\"\" class=\"wp-image-1228\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/9-4.png 590w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/9-4-300x122.png 300w\" sizes=\"auto, (max-width: 590px) 100vw, 590px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u811a\u672c\u540d\u79f0\u4e3aavg.awk\uff0c\u811a\u672c\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"591\" height=\"227\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/10-2.png\" alt=\"\" class=\"wp-image-1229\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/10-2.png 591w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/10-2-300x115.png 300w\" sizes=\"auto, (max-width: 591px) 100vw, 591px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u811a\u672c\u5185\u5bb9\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u901a\u8fc7\u9017\u53f7\u4f5c\u4e3a\u5206\u9694\u7b26\uff0c\u9996\u5148\u5b9a\u4e49\u53d8\u91cftotal\uff0c\u8ba1\u7b97\u6240\u6709\u57df\u7684\u548c\uff0c\u518d\u6b21\u5b9a\u4e49\u53d8\u91cfavg\uff0c\u53d6total\u6570\u7684\u5e73\u5747\u503c\uff0c\u6700\u540e\u901a\u8fc7print\u8fdb\u884c\u6253\u5370\u3002<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>\u7cfb\u7edf\u53d8\u91cf\uff1a<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">awk\u7cfb\u7edf\u53d8\u91cf\u53ef\u4ee5\u5206\u4e3a\u4e24\u79cd\uff0c\u7b2c\u4e00\u79cd\u7528\u4e8e\u6539\u53d8awk\u7684\u9ed8\u8ba4\u503c\uff0c\u5982\u57df\u5206\u5272\u7b26\uff0c\u7b2c\u4e8c\u79cd\u7528\u4e8e\u5b9a\u4e49\u7cfb\u7edf\u503c\uff0c\u5728\u5904\u7406\u6587\u672c\u7684\u65f6\u5019\u53ef\u4ee5\u8bfb\u53d6\u8fd9\u4e9b\u7cfb\u7edf\u503c\uff0c\u5982\u57df\u6570\u91cf\u3001\u5f53\u524d\u8bb0\u5f55\u6570\u3001\u5f53\u524d\u6587\u4ef6\u540d\u7b49\uff0cawk\u52a8\u6001\u6539\u53d8\u7b2c\u4e8c\u79cd\u7cfb\u7edf\u53d8\u91cf\u7684\u503c<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>awk\u73af\u5883\u53d8\u91cf\u53ca\u5176\u542b\u4e49<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u53d8\u91cf\u540d<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u542b\u4e49<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">$n<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5f53\u524d\u8bb0\u5f55\u7684\u7b2cn\u4e2a\u57df\uff0c\u57df\u7528FS\u5206\u5272<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">$0<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u8bb0\u5f55\u7684\u6240\u6709\u57df<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ARGC<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u547d\u4ee4\u884c\u53c2\u6570\u7684\u6570\u91cf<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ARGIND<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u547d\u4ee4\u884c\u4e2d\u5f53\u524d\u6587\u4ef6\u4f4d\u7f6e(\u4ee50\u5f00\u59cb\u6807\u53f7)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ARGV<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u547d\u4ee4\u884c\u53c2\u6570\u7684\u6570\u7ec4<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">CONVFMT<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6570\u5b57\u8f6c\u6362\u683c\u5f0f<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ENVIRON<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u73af\u5883\u53d8\u91cf\u5173\u8054\u6570\u7ec4<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ERRNO<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6700\u540e\u4e00\u4e2a\u7cfb\u7edf\u9519\u8bef\u7684\u63cf\u8ff0<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">FIELDWIDTHS<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5b57\u6bb5\u5bbd\u5ea6\u5217\u8868\uff0c\u4ee5\u7a7a\u683c\u952e\u5206\u5272<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">FILENAME<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5f53\u524d\u6587\u4ef6\u540d<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">FNR<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6d4f\u89c8\u6587\u4ef6\u7684\u8bb0\u5f55\u6570<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">FS<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5b57\u6bb5\u5206\u9694\u7b26\uff0c\u9ed8\u8ba4\u662f\u7a7a\u683c<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">IGNORECASE<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5e03\u5c14\u53d8\u91cf\uff0c\u5982\u679c\u4e3a\u771f\uff0c\u5ffd\u7565\u5927\u5c0f\u5199\u5339\u914d<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">NF<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5f53\u524d\u8bb0\u5f55\u7684\u57df\u6570\u91cf\uff0c\u5f53\u524d\u884c\u5b57\u6bb5\u6570<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">NR<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5f53\u524d\u8bb0\u5f55\u6570,\u5b9e\u9645\u6267\u884c\u65f6\u5bf9\u5e94\u4e8e\u5f53\u524d\u884c\u53f7<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">OFMT<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6570\u5b57\u7684\u8f93\u51fa\u683c\u5f0f<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">OFS<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u8f93\u51fa\u57df\u5206\u9694\u7b26\uff0c\u9ed8\u8ba4\u7a7a\u683c<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ORS<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u8f93\u5165\u8bb0\u5f55\u5206\u9694\u7b26\uff0c\u9ed8\u8ba4\u6362\u884c\u7b26<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">RS<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u8bb0\u5f55\u5206\u9694\u7b26\uff0c\u9ed8\u8ba4\u7a7a\u683c\u952e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">RLENGTH<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u7531match\u51fd\u6570\u6240\u5339\u914d\u7684\u5b57\u7b26\u4e32\u957f\u5ea6<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">RSTART<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u7531match\u51fd\u6570\u6240\u5339\u914d\u7684\u5b57\u7b26\u4e32\u7b2c\u4e00\u4e2a\u4f4d\u7f6e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">SUBSEP<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6570\u7ec4\u4e0b\u6807\u5206\u9694\u7b26\uff0c\u9ed8\u8ba4\u662f\\034<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a\u6587\u4ef6a.txt\u7684\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"695\" height=\"95\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/4-3.jpg\" alt=\"\" class=\"wp-image-15931\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/4-3.jpg 695w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/4-3-300x41.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/4-3-600x82.jpg 600w\" sizes=\"auto, (max-width: 695px) 100vw, 695px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3001\u6253\u5370\u5f53\u524d\u8bb0\u5f55\u6709\u591a\u5c11\u884c\uff0c\u4e5f\u5c31\u662f\u6587\u4ef6\u7684\u884c\u6570\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"693\" height=\"87\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/6-1.jpg\" alt=\"\" class=\"wp-image-15934\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/6-1.jpg 693w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/6-1-300x38.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/6-1-600x75.jpg 600w\" sizes=\"auto, (max-width: 693px) 100vw, 693px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">2\u3001\u6253\u5370\u6bcf\u4e2a\u8bb0\u5f55\u884c\u4e2d\u7684\u57df\u7684\u6570\u91cf\uff0c\u9ed8\u8ba4\u662f\u4ee5\u7a7a\u683c\u4f5c\u4e3a\u5206\u9694\u7b26\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"691\" height=\"88\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/5-2.jpg\" alt=\"\" class=\"wp-image-15933\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/5-2.jpg 691w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/5-2-300x38.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/5-2-600x76.jpg 600w\" sizes=\"auto, (max-width: 691px) 100vw, 691px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">a.txt\u4e2d\u7b2c\u4e00\u884c\u6709\u4e09\u4e2a\u57df\uff0c\u7b2c\u4e8c\u884c\u67092\u4e2a\u57df\uff0c\u7b2c\u4e09\u884c\u6709\u4e00\u4e2a\u57df<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3\u3001\u624b\u52a8\u8bbe\u7f6e\u4e3a\u9017\u53f7\u4e3a\u5206\u9694\u7b26\uff0c\u7136\u540e\u6253\u5370\u57df\u7684\u4e2a\u6570\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"693\" height=\"96\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/9-1.jpg\" alt=\"\" class=\"wp-image-15940\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/9-1.jpg 693w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/9-1-300x42.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/9-1-600x83.jpg 600w\" sizes=\"auto, (max-width: 693px) 100vw, 693px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">4\u3001\u6253\u5370\u6700\u540e\u4e00\u4e2a\u57df\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"689\" height=\"94\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/7-1.jpg\" alt=\"\" class=\"wp-image-15936\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/7-1.jpg 689w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/7-1-300x41.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/7-1-600x82.jpg 600w\" sizes=\"auto, (max-width: 689px) 100vw, 689px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\uff1a\u4f7f\u7528$NF\u5373\u53ef\u6253\u5370\u6700\u540e\u4e00\u4e2a\u57df<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5\u3001\u53bb\u6389\u6700\u540e\u4e00\u4e2a\u57df\u548c\u5192\u53f7\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>echo \"field1:field2:field3:field4\" | awk -F':' '{for(i=1;i&lt;NF;i++){printf \"%s\",$i;if(i&lt; NF-1) printf \":\"};print \"\"}'<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"697\" height=\"96\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/8-1.jpg\" alt=\"\" class=\"wp-image-15938\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/8-1.jpg 697w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/8-1-300x41.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/8-1-600x83.jpg 600w\" sizes=\"auto, (max-width: 697px) 100vw, 697px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>\u683c\u5f0f\u5316\u8f93\u51fa\uff1a<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">awk\u4e00\u5927\u4e3b\u8981\u529f\u80fd\u662f\u4ea7\u751f\u62a5\u8868\uff0cawk\u5b9a\u4e49\u4e86printf\u8f93\u51fa\u8bed\u53e5\uff0c\u6b64\u8bed\u53e5\u53ef\u4ee5\u89c4\u5b9a\u8f93\u51fa\u7684\u683c\u5f0f\uff0c\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1aprintf (\u683c\u5f0f\u63a7\u5236\u7b26\uff0c\u53c2\u6570)\uff0c\u683c\u5f0f\u63a7\u5236\u7b26\u4ee5%\u7b26\u53f7\u5f00\u59cb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">awk\u683c\u5f0f\u63a7\u5236\u7b26\u5206\u4e3a\u4fee\u9970\u7b26\u4ee5\u53ca\u683c\u5f0f\u7b26\u4e24\u79cd<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>printf\u4fee\u9970\u7b26\u53ca\u5176\u542b\u4e49<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u4fee\u9970\u7b26<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u542b\u4e49<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">&#8211;<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5de6\u5bf9\u9f50<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">width<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u57df\u7684\u6b65\u957f<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">.prec<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5c0f\u6570\u70b9\u53f3\u8fb9\u7684\u4f4d\u6570<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>printf\u683c\u5f0f\u7b26\u53ca\u5176\u542b\u4e49<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u683c\u5f0f\u7b26<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u542b\u4e49<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">%c<\/td><td class=\"has-text-align-center\" data-align=\"center\">ASCII\u5b57\u7b26<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">%d<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6574\u578b\u6570<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">%e<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6d6e\u70b9\u6570\uff0c\u79d1\u5b66\u8ba1\u6570\u6cd5<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">%f<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6d6e\u70b9\u6570<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">%o<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u516b\u8fdb\u5236\u6570<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">%s<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5b57\u7b26\u4e32<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">%x<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5341\u516d\u8fdb\u5236\u6570<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5b50\uff1a\u73b0\u6709\u4e00\u6587\u4ef6bb.txt\uff0c\u6587\u4ef6\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"595\" height=\"192\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/13-4.png\" alt=\"\" class=\"wp-image-1235\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/13-4.png 595w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/13-4-300x97.png 300w\" sizes=\"auto, (max-width: 595px) 100vw, 595px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6267\u884c\u547d\u4ee4\uff0c\u6253\u5370\u8f93\u51fa\u8bb0\u5f55\u884c\u4e2d\u7684\u7b2c\u4e00\u4e2a\u57df(\u5b57\u7b26\u4e32)\u4ee5\u53ca\u7b2c\u4e09\u4e2a\u57df(\u6574\u6570)\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"799\" height=\"245\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/14-4.png\" alt=\"\" class=\"wp-image-1236\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/14-4.png 799w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/14-4-300x92.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/14-4-768x235.png 768w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/14-4-600x184.png 600w\" sizes=\"auto, (max-width: 799px) 100vw, 799px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u4e2d\u4ee5\u9017\u53f7\u4e3a\u5206\u9694\u7b26\uff0c%s\u8868\u793a\u6253\u5370\u5b57\u7b26\u4e32\uff0c\u4e0e$1\u5bf9\u5e94\uff0c%d\u8868\u793a\u6253\u5370\u6574\u6570\uff0c\u4e0e$4\u5bf9\u5e94\uff0c\\t\u8868\u793a\u6253\u5370\u5b8c\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e4b\u540e\u52a0\u4e00\u4e2atab\u952e\uff0c\\n\u8868\u793a\u6253\u5370\u5b8c\u7b2c\u4e00\u4e2a\u8bb0\u5f55\u884c\u6570\u636e\u540e\uff0c\u8fdb\u884c\u6362\u884c\u3002\u6ce8\u610f\u4f7f\u7528\u7684\u662fprintf\u547d\u4ee4\uff0c\u540c\u65f6\u683c\u5f0f\u63a7\u5236\u7b26\u901a\u8fc7\u53cc\u5f15\u53f7\u5f15\u8d77\u6765<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6267\u884c\u547d\u4ee4\u5bf9\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32\u8fdb\u884c\u4fee\u9970\uff0c\u5c06\u5b57\u7b26\u4e32\u957f\u5ea6\u63a7\u5236\u572810\u4f4d\uff0c\u4e0d\u8db3\u75280\u8865\u9f50\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"839\" height=\"141\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/15-4.png\" alt=\"\" class=\"wp-image-1237\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/15-4.png 839w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/15-4-300x50.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/15-4-768x129.png 768w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/15-4-600x101.png 600w\" sizes=\"auto, (max-width: 839px) 100vw, 839px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>\u5185\u7f6e\u5b57\u7b26\u4e32\u51fd\u6570<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">awk\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5185\u7f6e\u5b57\u7b26\u4e32\u51fd\u6570\uff0c\u7528\u4e8e\u6587\u672c\u4e2d\u5b57\u7b26\u4e32\u7684\u66ff\u6362\u3001\u67e5\u627e\u4ee5\u53ca\u5206\u9694\u529f\u80fd<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>awk\u5b57\u7b26\u4e32\u51fd\u6570\u53ca\u5176\u542b\u4e49<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u51fd\u6570\u540d<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u542b\u4e49<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">gsub(r,s)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5728\u8f93\u5165\u6587\u4ef6\u4e2d\u7528s\u66ff\u6362r<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"> gsub(r,s,t) <\/td><td class=\"has-text-align-center\" data-align=\"center\"> \u5728t\u4e2d\u7528s\u66ff\u6362r <\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">index(s,t)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u8fd4\u56des\u4e2d\u5b57\u7b26\u4e32\u7b2c\u4e00\u4e2at\u7684\u4f4d\u7f6e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">length(s)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u8fd4\u56des\u7684\u957f\u5ea6<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">match(s,t)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6d4b\u8bd5s\u662f\u5426\u5305\u542b\u5339\u914dt\u7684\u5b57\u7b26\u4e32<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">split(r,s,t)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5728t\u4e0a\u5c06r\u5206\u6210\u5e8f\u5217s<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">sub(r,s,t)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5c06t\u4e2d\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684r\u66ff\u6362\u6210s<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">substr(r,s)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u8fd4\u56de\u5b57\u7b26\u4e32r\u4e2d\u4eces\u5f00\u59cb\u7684\u540e\u7f00\u90e8\u5206<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"> substr(r,s,t) <\/td><td class=\"has-text-align-center\" data-align=\"center\"> \u8fd4\u56de\u5b57\u7b26\u4e32r\u4e2d\u4eces\u5f00\u59cb\u957f\u5ea6\u4e3at\u7684\u540e\u7f00\u90e8\u5206 <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c06\/etc\/passwd\u6587\u4ef6\u4e2d\u7b2c\u4e00\u4e2a\u57df\u4e2d\u7684root\u5b57\u7b26\u4e32\u66ff\u6362\u6210test\uff0c\u6267\u884c\u547d\u4ee4\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1005\" height=\"193\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/16-4.png\" alt=\"\" class=\"wp-image-1239\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/16-4.png 1005w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/16-4-300x58.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/16-4-768x147.png 768w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/16-4-600x115.png 600w\" sizes=\"auto, (max-width: 1005px) 100vw, 1005px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u4e2dOFS\u8868\u793a\u6253\u5370\u57df\u5206\u9694\u7b26\uff0c\u6ce8\u610fFS\u4e0eOFS\u4e4b\u95f4\u7528\u5206\u53f7\u95f4\u9694\uff0cgsub\u51fd\u6570\u8868\u793a\u5339\u914droot\u5b57\u7b26\u4e32\u66ff\u6362\u6210test\uff0c$1\u8868\u793a\u7b2c\u4e00\u4e2a\u57df\uff0c$0\u8868\u793a\u6253\u5370\u6240\u6709\u5339\u914d\u7684\u57df<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u8981\u66ff\u6362\u5168\u90e8\u7684root\u5b57\u7b26\u4e32\u4e3atest\uff0c\u53ea\u9700\u8981\u5c06$1\u53bb\u6389\u5373\u53ef\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"972\" height=\"184\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/17-3.png\" alt=\"\" class=\"wp-image-1241\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/17-3.png 972w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/17-3-300x57.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/17-3-768x145.png 768w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/17-3-600x114.png 600w\" sizes=\"auto, (max-width: 972px) 100vw, 972px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">index()\u51fd\u6570\u8868\u793a\u8fd4\u56de\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u4e32\u5728\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32\u51fa\u73b0\u7684\u4f4d\u7f6e\uff0c\u6ce8\u610f\u8981\u4f7f\u7528BEGIN\u547d\u4ee4\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"708\" height=\"178\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/18-6.png\" alt=\"\" class=\"wp-image-1242\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/18-6.png 708w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/18-6-300x75.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/18-6-600x151.png 600w\" sizes=\"auto, (max-width: 708px) 100vw, 708px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">length()\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"678\" height=\"190\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/19-5.png\" alt=\"\" class=\"wp-image-1243\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/19-5.png 678w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/19-5-300x84.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/04\/19-5-600x168.png 600w\" sizes=\"auto, (max-width: 678px) 100vw, 678px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>awk\u4e0esed\u76f8\u4f3c\uff0c\u90fd\u662f\u7528\u4f5c\u6587\u672c\u5904\u7406\uff0cawk\u7684\u57fa\u672c\u529f\u80fd\u4e5f\u662f\u641c\u7d22\u6587\u4ef6\u4e2d\u5305\u542b\u67d0\u4e9b\u6a21\u5f0f\u7684\u884c\uff0c\u5f53\u67d0\u884c\u5339\u914d\u4e00\u4e2a\u6a21\u5f0f\u65f6\uff0ca [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1244,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,29],"tags":[82],"class_list":["post-1161","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-shell","category-yunwei","tag-awk"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"_links":{"self":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/1161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1161"}],"version-history":[{"count":31,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/1161\/revisions"}],"predecessor-version":[{"id":15941,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/1161\/revisions\/15941"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media\/1244"}],"wp:attachment":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}