{"id":271,"date":"2021-07-12T17:31:48","date_gmt":"2021-07-12T17:31:48","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=271"},"modified":"2021-09-18T11:10:43","modified_gmt":"2021-09-18T11:10:43","slug":"what-is-fsck","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/hadoop\/what-is-fsck\/","title":{"rendered":"What is fsck ?"},"content":{"rendered":"<div class=\"TextHeading\">\n<div class=\"hddn\">\n<h2 id=\"what-is-fsck\" class=\"color-pink\" style=\"text-align: justify;\">What is fsck ?<\/h2>\n<\/div>\n<\/div>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>Fsck stands for\u00a0<b>File System Check<\/b>. This command is used by HDFS and also used to check inconsistencies and if there is any problem in the file.<\/li>\n<li>For example, if there are any missing blocks for a file, HDFS gets notified through this command.<\/li>\n<li>There are two modes used in fsck command interactive and non-interactive.\n<ul>\n<li><b>Interactive mode<\/b>\u00a0prompts the user each time it finds an error to determine whether or not the user wants to fix the error or continue without fixing.<\/li>\n<li><b>Non-interactive mode<\/b>\u00a0automatically corrects errors without prompting the user.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"ImageContent\" style=\"text-align: justify;\">\n<div class=\"hddn\"><img decoding=\"async\" class=\"img-responsive center-block aligncenter\" src=\"https:\/\/cdn.wikitechy.com\/interview-questions\/hadoop\/what-is-fsck.gif\" alt=\"What is fsck\" \/><\/div>\n<\/div>\n<div class=\"TextHeading\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<h2 id=\"command-list\" class=\"color-purple\">Command list<\/h2>\n<\/div>\n<\/div>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>There are different arguments that can be passed with this command to emit different results.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"hddn\">\n<table class=\"table-bordered table-striped table table-responsive\">\n<tbody>\n<tr style=\"text-align: justify;\">\n<th>COMMAND_OPTION<\/th>\n<th>Description<\/th>\n<\/tr>\n<tr style=\"text-align: justify;\">\n<td class=\"text-leftalign\">path<\/td>\n<td class=\"text-leftalign\">Start checking from this path.<\/td>\n<\/tr>\n<tr style=\"text-align: justify;\">\n<td class=\"text-leftalign\">move<\/td>\n<td class=\"text-leftalign\">Move corrupted files to \/lost+found<\/td>\n<\/tr>\n<tr style=\"text-align: justify;\">\n<td class=\"text-leftalign\">delete<\/td>\n<td class=\"text-leftalign\">Delete corrupted files.<\/td>\n<\/tr>\n<tr style=\"text-align: justify;\">\n<td class=\"text-leftalign\">openforwrite<\/td>\n<td class=\"text-leftalign\">Print out files opened for write.<\/td>\n<\/tr>\n<tr style=\"text-align: justify;\">\n<td class=\"text-leftalign\">files<\/td>\n<td class=\"text-leftalign\">Print out files being checked.<\/td>\n<\/tr>\n<tr style=\"text-align: justify;\">\n<td class=\"text-leftalign\">blocks<\/td>\n<td class=\"text-leftalign\">Print out block report.<\/td>\n<\/tr>\n<tr style=\"text-align: justify;\">\n<td class=\"text-leftalign\">locations<\/td>\n<td class=\"text-leftalign\">Print out locations for every block.<\/td>\n<\/tr>\n<tr>\n<td class=\"text-leftalign\" style=\"text-align: justify;\">racks<\/td>\n<td class=\"text-leftalign\" style=\"text-align: justify;\">Print out network topology for data-node locations.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Answer : Fsck stands for File System Check. This command is used&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3712],"tags":[195,1119,360,203,199,214,1189,1120,205,1193,1203,485,222,1180,1202,1183,1185,1194,1201,1181,1196,1187,484,1199,1197,196,212,286,1191,1190,1195,1182,970,366,288,367,1198,1188,206,1184,975,200,974,1204,1192,197,280,364,1200,968,216,285,1121],"class_list":["post-271","post","type-post","status-publish","format-standard","hentry","category-hadoop","tag-accenture-interview-questions-and-answers","tag-att-interview-questions-and-answers","tag-atos-interview-questions-and-answers","tag-capgemini-interview-questions-and-answers","tag-casting-networks-india-pvt-limited-interview-questions-and-answers","tag-cgi-group-inc-interview-questions-and-answers","tag-check-disk-command","tag-collabera-technologiesinterview-questions-and-answers","tag-dell-international-services-india-pvt-ltd-interview-questions-and-answers","tag-disk-linux","tag-e2fsck","tag-ernst-young-interview-questions-and-answers","tag-flipkart-interview-questions-and-answers","tag-fsck","tag-fsck-command","tag-fsck-command-in-hadoop","tag-fsck-command-in-linux","tag-fsck-example","tag-fsck-linux","tag-fsck-linuxfsck-command","tag-fsck-on-mounted-drive","tag-fsck-ubuntu","tag-genpact-interview-questions-and-answers","tag-how-to-repair-filesystem-in-redhat-linuxfsck-mac","tag-how-to-run-fsck-on-root-filesystem-in-linux","tag-ibm-interview-questions-and-answers","tag-indecomm-global-services-interview-questions-and-answers","tag-lt-infotech-interview-questions-and-answers","tag-linux-file-system-commands","tag-linux-find-file","tag-linux-fsck-on-boot","tag-mac-repair","tag-mindtree-interview-questions-and-answers","tag-netapp-interview-questions-and-answers","tag-r-systems-interview-questions-and-answers","tag-rbs-india-development-centre-pvt-ltd-interview-questions-and-answers","tag-repair-filesystem","tag-run-fsck-manually","tag-sap-labs-india-pvt-ltd-interview-questions-and-answers","tag-system-file-checker","tag-tata-consultancy-service-interview-questions-and-answers","tag-tech-mahindra-interview-questions-and-answers","tag-trigent-software-interview-questions-and-answers","tag-types-of-files-in-unix","tag-types-of-files-in-unixf","tag-unitedhealth-group-interview-questions-and-answers","tag-virtusa-consulting-services-pvt-ltd-interview-questions-and-answers","tag-wells-fargo-interview-questions-and-answers","tag-what-is-fsck","tag-wipro-infotech-interview-questions-and-answers","tag-wipro-interview-questions-and-answers","tag-xoriant-solutions-pvt-ltd-interview-questions-and-answers","tag-zs-associates-interview-questions-and-answers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is fsck ? - Big Data Interview Questions - Wikitechy<\/title>\n<meta name=\"description\" content=\"What is fsck ? - fsck stands for File System Check. 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