Linux 命令

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 (29-May-2006)
Filesystem volume name: /
last mounted on:
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 2013 
Last mount time: Thu Aug 1 16:42:07 2013 
Last write time: Thu Aug 1 16:42:07 2013 
Mount count: 10 
Maximum mount count: -1 
Last checked: Sun Mar 24 02:09:14 2013 
Check interval: 0 () 
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 ...