{"id":2570,"date":"2015-12-12T10:41:21","date_gmt":"2015-12-12T02:41:21","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=2570"},"modified":"2015-12-12T10:41:21","modified_gmt":"2015-12-12T02:41:21","slug":"awk%e5%ad%a6%e4%b9%a0_6","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/2570.html","title":{"rendered":"Awk\u5b66\u4e60_6"},"content":{"rendered":"<p>=Start=<\/p>\n<h6>0.awk\u7684\u7a0b\u5e8f\u8bbe\u8ba1\u6a21\u578b<\/h6>\n<p>awk\u7a0b\u5e8f\u662f\u7531\u6240\u8c13\u7684\u4e3b\u8f93\u5165(main input)\u5faa\u73af\u7ec4\u6210\u7684\u3002\u4e00\u4e2a\u5faa\u73af\u662f\u4e00\u4e2a\u4f8b\u7a0b\uff0c\u5b83\u5c06\u4e00\u76f4\u91cd\u590d\u6267\u884c\u76f4\u5230\u7531\u4e00\u4e9b\u5b58\u5728\u7684\u6761\u4ef6\u7ec8\u6b62\u5b83\u3002\u4f60\u4e0d\u5fc5\u5199\u8fd9\u4e2a\u5faa\u73af\uff0c\u5b83\u662f\u73b0\u6210\u7684\uff0c\u5b83\u4f5c\u4e3a\u4e00\u4e2a\u6846\u67b6\u5b58\u5728\uff0c\u5728\u8fd9\u4e2a\u6846\u67b6\u4e2d\u4f60\u7f16\u5199\u7684\u4ee3\u7801\u80fd\u591f\u6267\u884c\u3002<\/p>\n<p>awk\u5141\u8bb8\u4f60\u7f16\u5199\u4e24\u4e2a\u7279\u6b8a\u7684\u4f8b\u7a0b\uff0c\u5b83\u4eec\u5728<strong><span style=\"color: #ff0000;\">\u4efb\u4f55\u8f93\u5165\u88ab\u8bfb\u53d6\u524d<\/span><\/strong>\u548c<span style=\"color: #0000ff;\"><strong>\u6240\u6709\u8f93\u5165\u90fd\u88ab\u8bfb\u53d6\u540e<\/strong><\/span>\u6267\u884c\u3002\u5b83\u4eec\u662f\u4e0eBEGIN\u548cEND\u89c4\u5219\u76f8\u5173\u7684\u8fc7\u7a0b\u3002<\/p>\n<h6>1.awk\u7684split\/substr\/index\u51fd\u6570\u7684\u4f7f\u7528<\/h6>\n<pre class=\"lang:default decode:true\"># \u4f7f\u7528split\u8fd4\u56de\u5b57\u7b26\u4e32\u6570\u7ec4\u5143\u7d20\u4e2a\u6570\u3002\nawk 'BEGIN {print split(\"123#456#678\", myarray, \"#\")}'  # 3\n\nnetstat -lntp | awk 'NR&gt;2 {a_len=split($4,a,\":\"); print a_len, a[a_len]}'\nnetstat -lntp | awk 'NR&gt;2 {a_len=split($4,a,\":\"); print $4, a[a_len]}'\nnetstat -lntp | awk 'NR&gt;2 {b_len=split($NF,b,\"\/\"); print b_len, b[b_len]}'\nnetstat -lntp | awk 'NR&gt;2 {b_len=split($NF,b,\"\/\"); print $NF, b[b_len]}'\n\n\n\/sbin\/ip a l | grep \"inet \" | grep -v '127.0.0' | awk '{print $2}'\n\/sbin\/ip a l | grep 'inet ' | grep -v '127.0.0' | awk '{print $2}' | xargs | tr ' ' '|'\n\n\/sbin\/ifconfig | grep \"inet \" | grep -v '127.0.0' | awk '{split($2, a, \":\"); print a[2]}'\n\/sbin\/ifconfig | grep 'inet ' | grep -v '127.0.0' | awk '{split($2, a, \":\"); print a[2]}' | xargs | tr ' ' '|'\n\n# awk\u7684 split \u51fd\u6570\u65e0\u6cd5\u6307\u5b9a\u5207\u5206\u7684\u6b21\u6570\uff0c\u6240\u4ee5\u5728\u78b0\u5230\u4e0b\u9762\u7684\u90a3\u79cd\u542f\u52a8\u8fdb\u7a0b\u7684\u65b9\u5f0f\u65f6\u5c31\u5bb9\u6613\u6709\u95ee\u9898\n# # netstat -lntp\n# Active Internet connections (only servers)\n# Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID\/Program name\n# tcp        0      0 0.0.0.0:7710                0.0.0.0:*                   LISTEN      1270\/.\/redis-3.0.0\/\n# tcp        0      0 0.0.0.0:7712                0.0.0.0:*                   LISTEN      1271\/.\/redis-2.8.23\n\n## \u4f7f\u7528 index \u548c substr \u8fbe\u5230\u7c7b\u4f3c\u7684\u529f\u80fd ##\n# netstat -lntp | awk 'NR&gt;2 {pos=index($NF, \"\/\"); print $NF, pos}'\n1309\/mysqld 5\n10790\/.\/redis-3.0.5 6\n1195\/sshd 5\n1380\/master 5\n10790\/.\/redis-3.0.5 6\n1195\/sshd 5\n\n# netstat -lntp | awk 'NR&gt;2 {pos=index($NF, \"\/\"); print substr($NF, pos)}'\n\/mysqld\n\/.\/redis-3.0.5\n\/sshd\n\/master\n\/.\/redis-3.0.5\n\/sshd\n\n# netstat -lntp | awk 'NR&gt;2 {pos=index($NF, \"\/\"); print substr($NF, pos+1)}'   #\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528'+'\u8fdb\u884c\u7b97\u672f\u64cd\u4f5c\nmysqld\n.\/redis-3.0.5\nsshd\nmaster\n.\/redis-3.0.5\nsshd<\/pre>\n<h6>2.awk\u7684next\u7684\u4f7f\u7528<\/h6>\n<pre class=\"lang:default decode:true\">#\u793a\u4f8b\uff1a\u89e3\u6790XML\u6587\u4ef6(\u8fc7\u6ee4\u6389\u7a7a\u884c\u548c\u6ce8\u91ca\u884c)\n$ cat \"$file\" | awk '\/&lt;!--\/,\/--&gt;\/{next}1' | tr -d '\\n\\r' | sed 's\/&gt;\/&gt;\\n\/g' | tr '\\t' ' ' | tr -s ' ' | sed 's\/^ \/\/g;s\/ $\/\/g' | grep -v '^$'<\/pre>\n<h6>3.\u7528awk\u5904\u7406\u591a\u884c\u8bb0\u5f55<\/h6>\n<pre class=\"lang:default decode:true \">#\u4e3a\u4e86\u5904\u7406\u4ee5\u4e0b\u8fd9\u79cd\u5305\u542b\u591a\u884c\u6570\u636e\u7684\u8bb0\u5f55\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5b57\u6bb5\u5206\u9694\u7b26(FS)\u5b9a\u4e49\u4e3a\u6362\u884c\u7b26\uff0c\u5e76\u5c06\u8bb0\u5f55\u5206\u9694\u7b26(RS)\u8bbe\u7f6e\u4e3a\u7a7a\u5b57\u7b26\u4e32\u2014\u2014\u5b83\u4ee3\u8868\u4e00\u4e2a\u7a7a\u884c\u3002\n$ cat .\/multi_line_record.txt\nJohn Daggett\nKoren Inc.\n341 King Road\nPlymouth\nMA 01760\n696-0987\n\nAlice Ford\nMeituan Inc.\n22 East Broadway\nRichmond\nVA 08239\n699-1998\n\n$ awk 'BEGIN{ FS = \"\\n\"; RS = \"\" } { print $1, $NF }' multi_line_record.txt\nJohn Daggett 696-0987\nAlice Ford 699-1998<\/pre>\n<p>&nbsp;<\/p>\n<h6>\u6ce8\u610f\uff1a<\/h6>\n<p>\u5728\u547d\u4ee4\u884c\u4e2d\u4f7f\u7528awk\u65f6\uff0c<span style=\"color: #ff0000;\"><strong>\u5fc5\u987b\u6709<\/strong><\/span>\uff1a<\/p>\n<ul>\n<li>\u5355\u5f15\u53f7<\/li>\n<li>\u5927\u62ec\u53f7<\/li>\n<\/ul>\n<h6>\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n<ul>\n<li><a href=\"http:\/\/www.linuxsong.org\/2010\/09\/awk-string-function\/\" target=\"_blank\">http:\/\/www.linuxsong.org\/2010\/09\/awk-string-function\/<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/8009664\/split-string-to-array-using-awk\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/8009664\/split-string-to-array-using-awk<\/a><\/li>\n<\/ul>\n<p>=EOF=<\/p>\n","protected":false},"excerpt":{"rendered":"<p>=Start= 0.awk\u7684\u7a0b\u5e8f\u8bbe\u8ba1\u6a21\u578b awk\u7a0b\u5e8f\u662f\u7531\u6240\u8c13\u7684\u4e3b\u8f93\u5165(main input)\u5faa\u73af\u7ec4\u6210\u7684\u3002\u4e00\u4e2a\u5faa [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,11,12],"tags":[74,19],"class_list":["post-2570","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-linux","category-tools","tag-awk","tag-tips"],"views":5150,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/2570","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=2570"}],"version-history":[{"count":0,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/2570\/revisions"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=2570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=2570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=2570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}