{"id":3858,"date":"2022-12-20T17:20:17","date_gmt":"2022-12-20T20:20:17","guid":{"rendered":"http:\/\/lode.uno\/linux-man\/index.php\/2022\/12\/20\/dumpe2fs-man8\/"},"modified":"2022-12-20T17:20:17","modified_gmt":"2022-12-20T20:20:17","slug":"dumpe2fs-man8","status":"publish","type":"post","link":"https:\/\/lode.uno\/linux-man\/2022\/12\/20\/dumpe2fs-man8\/","title":{"rendered":"DUMPE2FS (man8)"},"content":{"rendered":"<h1 align=\"center\">DUMPE2FS<\/h1>\n<p> <a href=\"#NAME\">NAME<\/a><br \/> <a href=\"#SYNOPSIS\">SYNOPSIS<\/a><br \/> <a href=\"#DESCRIPTION\">DESCRIPTION<\/a><br \/> <a href=\"#OPTIONS\">OPTIONS<\/a><br \/> <a href=\"#EXIT CODE\">EXIT CODE<\/a><br \/> <a href=\"#BUGS\">BUGS<\/a><br \/> <a href=\"#AUTHOR\">AUTHOR<\/a><br \/> <a href=\"#AVAILABILITY\">AVAILABILITY<\/a><br \/> <a href=\"#SEE ALSO\">SEE ALSO<\/a> <\/p>\n<hr>\n<h2>NAME <a name=\"NAME\"><\/a> <\/h2>\n<p style=\"margin-left:11%; margin-top: 1em\">dumpe2fs \u2212 dump ext2\/ext3\/ext4 filesystem information<\/p>\n<h2>SYNOPSIS <a name=\"SYNOPSIS\"><\/a> <\/h2>\n<p style=\"margin-left:11%; margin-top: 1em\"><b>dumpe2fs<\/b> [ <b>\u2212bfghixV<\/b> ] [ <b>\u2212o superblock=<\/b><i>superblock<\/i> ] [ <b>\u2212o blocksize=<\/b><i>blocksize<\/i> ] <i>device<\/i><\/p>\n<h2>DESCRIPTION <a name=\"DESCRIPTION\"><\/a> <\/h2>\n<p style=\"margin-left:11%; margin-top: 1em\"><i><b>dumpe2fs<\/b><\/i> prints the super block and blocks group information for the filesystem present on <i>device.<\/i><\/p>\n<p style=\"margin-left:11%; margin-top: 1em\"><b>Note:<\/b> When used with a mounted filesystem, the printed information may be old or inconsistent.<\/p>\n<h2>OPTIONS <a name=\"OPTIONS\"><\/a> <\/h2>\n<table width=\"100%\" border=\"0\" rules=\"none\" frame=\"void\" cellspacing=\"0\" cellpadding=\"0\">\n<tr valign=\"top\" align=\"left\">\n<td width=\"11%\"><\/td>\n<td width=\"3%\">\n<p style=\"margin-top: 1em\"><b>\u2212b<\/b><\/p>\n<\/td>\n<td width=\"8%\"><\/td>\n<td width=\"78%\">\n<p style=\"margin-top: 1em\">print the blocks which are reserved as bad in the filesystem.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p style=\"margin-left:11%;\"><b>\u2212o superblock=<\/b><i>superblock<\/i><\/p>\n<p style=\"margin-left:22%;\">use the block <i>superblock<\/i> when examining the filesystem. This option is not usually needed except by a filesystem wizard who is examining the remains of a very badly corrupted filesystem.<\/p>\n<p style=\"margin-left:11%;\"><b>\u2212o blocksize=<\/b><i>blocksize<\/i><\/p>\n<p style=\"margin-left:22%;\">use blocks of <i>blocksize<\/i> bytes when examining the filesystem. This option is not usually needed except by a filesystem wizard who is examining the remains of a very badly corrupted filesystem.<\/p>\n<table width=\"100%\" border=\"0\" rules=\"none\" frame=\"void\" cellspacing=\"0\" cellpadding=\"0\">\n<tr valign=\"top\" align=\"left\">\n<td width=\"11%\"><\/td>\n<td width=\"3%\">\n<p><b>\u2212f<\/b><\/p>\n<\/td>\n<td width=\"8%\"><\/td>\n<td width=\"78%\">\n<p>force dumpe2fs to display a filesystem even though it may have some filesystem feature flags which dumpe2fs may not understand (and which can cause some of dumpe2fs\u2019s display to be suspect).<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"top\" align=\"left\">\n<td width=\"11%\"><\/td>\n<td width=\"3%\">\n<p><b>\u2212g<\/b><\/p>\n<\/td>\n<td width=\"8%\"><\/td>\n<td width=\"78%\">\n<p>display the group descriptor information in a machine readable colon-separated value format. The fields displayed are the group number; the number of the first block in the group; the superblock location (or -1 if not present); the range of blocks used by the group descriptors (or -1 if not present); the block bitmap location; the inode bitmap location; and the range of blocks used by the inode table.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"top\" align=\"left\">\n<td width=\"11%\"><\/td>\n<td width=\"3%\">\n<p><b>\u2212h<\/b><\/p>\n<\/td>\n<td width=\"8%\"><\/td>\n<td width=\"78%\">\n<p>only display the superblock information and not any of the block group descriptor detail information.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"top\" align=\"left\">\n<td width=\"11%\"><\/td>\n<td width=\"3%\">\n<p><b>\u2212i<\/b><\/p>\n<\/td>\n<td width=\"8%\"><\/td>\n<td width=\"78%\">\n<p>display the filesystem data from an image file created by <b>e2image<\/b>, using <i>device<\/i> as the pathname to the image file.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"top\" align=\"left\">\n<td width=\"11%\"><\/td>\n<td width=\"3%\">\n<p><b>\u2212m<\/b><\/p>\n<\/td>\n<td width=\"8%\"><\/td>\n<td width=\"78%\">\n<p>If the <b>mmp<\/b> feature is enabled on the filesystem, check if <i>device<\/i> is in use by another node, see <b>e2mmpstatus<\/b>(8) for full details. If used together with the <b>\u2212i<\/b> option, only the MMP block information is printed.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"top\" align=\"left\">\n<td width=\"11%\"><\/td>\n<td width=\"3%\">\n<p><b>\u2212x<\/b><\/p>\n<\/td>\n<td width=\"8%\"><\/td>\n<td width=\"78%\">\n<p>print the detailed group information block numbers in hexadecimal format<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"top\" align=\"left\">\n<td width=\"11%\"><\/td>\n<td width=\"3%\">\n<p><b>\u2212V<\/b><\/p>\n<\/td>\n<td width=\"8%\"><\/td>\n<td width=\"78%\">\n<p>print the version number of <b>dumpe2fs<\/b> and exit.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<h2>EXIT CODE <a name=\"EXIT CODE\"><\/a> <\/h2>\n<p style=\"margin-left:11%; margin-top: 1em\"><b>dumpe2fs<\/b> exits with a return code of 0 if the operation completed without errors. It will exit with a non-zero return code if there are any errors, such as problems reading a valid superblock, bad checksums, or if the device is in use by another node and <b>-m<\/b> is specified.<\/p>\n<h2>BUGS <a name=\"BUGS\"><\/a> <\/h2>\n<p style=\"margin-left:11%; margin-top: 1em\">You may need to know the physical filesystem structure to understand the output.<\/p>\n<h2>AUTHOR <a name=\"AUTHOR\"><\/a> <\/h2>\n<p style=\"margin-left:11%; margin-top: 1em\"><b>dumpe2fs<\/b> was written by Remy Card <Remy.Card@linux.org>. It is currently being maintained by Theodore Ts\u2019o <tytso@alum.mit.edu>.<\/p>\n<h2>AVAILABILITY <a name=\"AVAILABILITY\"><\/a> <\/h2>\n<p style=\"margin-left:11%; margin-top: 1em\"><b>dumpe2fs<\/b> is part of the e2fsprogs package and is available from http:\/\/e2fsprogs.sourceforge.net.<\/p>\n<h2>SEE ALSO <a name=\"SEE ALSO\"><\/a> <\/h2>\n<p style=\"margin-left:11%; margin-top: 1em\"><b>e2fsck<\/b>(8), <b>e2mmpstatus<\/b>(8), <b>mke2fs<\/b>(8), <b>tune2fs<\/b>(8). <b>ext4<\/b>(5)<\/p>\n<hr>\n","protected":false},"excerpt":{"rendered":"<p>  dumpe2fs \u2212 dump ext2\/ext3\/ext4 filesystem information <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[5,52,951,4],"class_list":["post-3858","post","type-post","status-publish","format-standard","hentry","category-8-administracion-del-sistema","tag-5","tag-administracion","tag-dumpe2fs","tag-man8"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3858","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=3858"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3858\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=3858"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=3858"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=3858"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}