SIMPLE SOLUTIONS

DUMPE2FS(8) - Linux man page online | Administration and privileged commands

Dump ext2/ext3/ext4 filesystem information.

Chapter
March 2018
DUMPE2FS(8) System Manager's Manual DUMPE2FS(8)

NAME

dumpe2fs - dump ext2/ext3/ext4 filesystem information

SYNOPSIS

dumpe2fs [ -bfghixV ] [ -o superblock=superblock ] [ -o blocksize=blocksize ] device

DESCRIPTION

dumpe2fs prints the super block and blocks group information for the filesystem present on device. Note: When used with a mounted filesystem, the printed information may be old or inconsis‐ tent.

OPTIONS

-b print the blocks which are reserved as bad in the filesystem. -o superblock=superblock use the block superblock 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. -o blocksize=blocksize use blocks of blocksize 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. -f force dumpe2fs to display a filesystem even though it may have some filesystem fea‐ ture flags which dumpe2fs may not understand (and which can cause some of dumpe2fs's display to be suspect). -g 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 loca‐ tion; the inode bitmap location; and the range of blocks used by the inode table. -h only display the superblock information and not any of the block group descriptor detail information. -i display the filesystem data from an image file created by e2image, using device as the pathname to the image file. -x print the detailed group information block numbers in hexadecimal format -V print the version number of dumpe2fs and exit.

BUGS

You need to know the physical filesystem structure to understand the output.

AUTHOR

dumpe2fs was written by Remy Card <@linux.org>. It is currently being maintained by Theodore Ts'o <@alum.mit.edu>.

AVAILABILITY

dumpe2fs is part of the e2fsprogs package and is available from http://e2fsprogs.source‐ forge.net.

SEE ALSO

e2fsck(8), mke2fs(8), tune2fs(8). ext4(5)
E2fsprogs version 1.44.1 March 2018 DUMPE2FS(8)
This manual Reference Other manuals
dumpe2fs(8) referred by badblocks(8) | debugfs(8) | drbd.conf-8.3(5) | drbd.conf-8.4(5) | drbd.conf-9.0(5) | e2freefrag(8) | e2fsck(8) | e2fsck.static(8) | e2image(8) | ext4(5) | mke2fs(8) | tune2fs(8)
refer to e2fsck(8) | ext4(5) | mke2fs(8) | tune2fs(8)
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Main page System Manager's Manual (+2060) E2fsprogs version 1.44.1 (+30) № 8 (+5755)
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