{"id":1145,"date":"2018-02-15T15:39:23","date_gmt":"2018-02-15T14:39:23","guid":{"rendered":"https:\/\/dbafox.com\/?p=1145"},"modified":"2018-02-15T15:41:27","modified_gmt":"2018-02-15T14:41:27","slug":"hadoop-run-tutorial-examples","status":"publish","type":"post","link":"https:\/\/dbafox.com\/?p=1145","title":{"rendered":"Hadoop &#8211; run tutorial examples"},"content":{"rendered":"\n<pre class=\"toolbar-overlay:false lang:apache decode:true \" title=\"hadoop tutorial examples\" ># java -XshowSettings:properties -version 2&gt;&amp;1 &gt; \/dev\/null | grep 'java.home'\r\n    java.home = \/usr\/lib\/jvm\/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64\/jre\r\n\t\r\nset JAVA_HOME in .\/etc\/hadoop(hadoop-env.sh\r\n\r\nFrom hadoop installation directory \r\n$ .\/bin\/hadoop jar share\/hadoop\/mapreduce\/hadoop-mapreduce-examples-3.0.0.jar wordcount input output\r\n\r\noutput directory should not exist before running above\r\n\r\n-- output directories should not exist\r\n.\/bin\/hadoop jar .\/share\/hadoop\/mapreduce\/hadoop-mapreduce-examples-3.0.0.jar grep input output2 'dfs[a-z.]+'\r\n\r\n.\/bin\/hadoop jar .\/share\/hadoop\/mapreduce\/hadoop-mapreduce-examples-3.0.0.jar grep input output3 'yar[a-z.]+'<\/pre>\n","protected":false},"excerpt":{"rendered":"<p># java -XshowSettings:properties -version 2&gt;&amp;1 &gt; \/dev\/null | grep &#8216;java.home&#8217; java.home = \/usr\/lib\/jvm\/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64\/jre set JAVA_HOME in .\/etc\/hadoop(hadoop-env.sh From hadoop installation directory $ .\/bin\/hadoop jar share\/hadoop\/mapreduce\/hadoop-mapreduce-examples-3.0.0.jar wordcount input output output directory should not exist before running above &#8212; output directories should &hellip; <a href=\"https:\/\/dbafox.com\/?p=1145\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pgc_sgb_lightbox_settings":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[59],"tags":[],"class_list":["post-1145","post","type-post","status-publish","format-standard","hentry","category-hadoop"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hadoop - run tutorial examples - dbafox<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dbafox.com\/?p=1145\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hadoop - run tutorial examples - dbafox\" \/>\n<meta property=\"og:description\" content=\"# java -XshowSettings:properties -version 2&gt;&amp;1 &gt; \/dev\/null | grep &#039;java.home&#039; java.home = \/usr\/lib\/jvm\/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64\/jre set JAVA_HOME in .\/etc\/hadoop(hadoop-env.sh From hadoop installation directory $ .\/bin\/hadoop jar share\/hadoop\/mapreduce\/hadoop-mapreduce-examples-3.0.0.jar wordcount input output output directory should not exist before running above -- output directories should &hellip; Continue reading &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dbafox.com\/?p=1145\" \/>\n<meta property=\"og:site_name\" content=\"dbafox\" \/>\n<meta property=\"article:published_time\" content=\"2018-02-15T14:39:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2018-02-15T14:41:27+00:00\" \/>\n<meta name=\"author\" content=\"Ray Fox\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ray Fox\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/dbafox.com\/?p=1145\",\"url\":\"https:\/\/dbafox.com\/?p=1145\",\"name\":\"Hadoop - run tutorial examples - dbafox\",\"isPartOf\":{\"@id\":\"https:\/\/dbafox.com\/#website\"},\"datePublished\":\"2018-02-15T14:39:23+00:00\",\"dateModified\":\"2018-02-15T14:41:27+00:00\",\"author\":{\"@id\":\"https:\/\/dbafox.com\/#\/schema\/person\/287adc474c1aebd398752ac4dcfe27eb\"},\"breadcrumb\":{\"@id\":\"https:\/\/dbafox.com\/?p=1145#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/dbafox.com\/?p=1145\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/dbafox.com\/?p=1145#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/dbafox.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Hadoop &#8211; 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\/dev\/null | grep 'java.home' java.home = \/usr\/lib\/jvm\/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64\/jre set JAVA_HOME in .\/etc\/hadoop(hadoop-env.sh From hadoop installation directory $ .\/bin\/hadoop jar share\/hadoop\/mapreduce\/hadoop-mapreduce-examples-3.0.0.jar wordcount input output output directory should not exist before running above -- output directories should &hellip; Continue reading &rarr;","og_url":"https:\/\/dbafox.com\/?p=1145","og_site_name":"dbafox","article_published_time":"2018-02-15T14:39:23+00:00","article_modified_time":"2018-02-15T14:41:27+00:00","author":"Ray Fox","twitter_misc":{"Written by":"Ray Fox"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/dbafox.com\/?p=1145","url":"https:\/\/dbafox.com\/?p=1145","name":"Hadoop - run tutorial examples - dbafox","isPartOf":{"@id":"https:\/\/dbafox.com\/#website"},"datePublished":"2018-02-15T14:39:23+00:00","dateModified":"2018-02-15T14:41:27+00:00","author":{"@id":"https:\/\/dbafox.com\/#\/schema\/person\/287adc474c1aebd398752ac4dcfe27eb"},"breadcrumb":{"@id":"https:\/\/dbafox.com\/?p=1145#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/dbafox.com\/?p=1145"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/dbafox.com\/?p=1145#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/dbafox.com\/"},{"@type":"ListItem","position":2,"name":"Hadoop &#8211; 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