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Linux dumpe2fs命令详细解释

Linux dumpe2fs命令用于打印“ext2/ext3”文件系统的超级块和快组信息。

语法

dumpe2fs(选项)(参数)

选项

-b:打印文件系统中预留的块信息;
-ob<超级块>:指定检查文件系统时使用的超级块;
-OB<块大小>:检查文件系统时使用的指定的块大小;
-h:仅显示超级块信息;
-i:从指定的文件系统映像文件中读取文件系统信息;
-x:以16进制格式打印信息块成员。

参数

文件系统:指定要查看信息的文件系统。

实例

dumpe2fs /dev/hda1
dumpe2fs 1.39 (6-Feb-2018)
Filesystem volume name:   /
last mounted on:          <not available>
Filesystem UUID:          845ccd40-1f3b-4729-a63d-cb80f51b082a
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              5242880
Block count:              5241817
Reserved block count:     262090
free blocks:              4434157
Free inodes:              5170836
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      1022
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         32768
Inode blocks per group:   1024
Filesystem created:       Sun Mar 24 02:09:14 2017
Last mount time:          Thu Aug  1 16:42:07 2017
Last write time:          Thu Aug  1 16:42:07 2017
Mount count:              10
Maximum mount count:      -1
Last checked:             Sun Mar 24 02:09:14 2017
Check interval:           0 (<none>)
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               128
Journal inode:            8
First orphan inode:       3735559
Default directory hash:   tea
Directory Hash Seed:      e3f7162e-1194-4161-805d-763db89dbc69
Journal backup:           inode blocks
Journal size:             128M

Group 0: (Blocks 0-32767)
Primary superblock at 0, Group descriptors at 1-2
Reserved GDT blocks at 3-1024
Block bitmap at 1025 (+1025), Inode bitmap at 1026 (+1026)
Inode table at 1027-2050 (+1027)
0 free blocks, 32757 free inodes, 2 directories
Free blocks:
Free inodes: 12-32768

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