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命令名称
dumpe2fs - 显示ext2/ext3/ext4文件系统信息。dumpe2fs命令语法
dumpe2fs [ -bfhixV ] [ -o superblock=superblock ] [ -o blocksize=blocksize ] device 语法看起来比较复杂，看不懂的直接看下面的常用命令选项和实例。dumpe2fs命令描述
显示device中文件系统的超级块和块组信息。dumpe2fs常用命令选项
| 选项 | 描述 |
| -b | 打印文件系统中的坏块 |
| -o | 不常用，检查严重损坏文件系统时指定 |
| -f | 强制显示所有信息，即便dumpe2fs对有些文件系统功能标识不能识别。 |
| - i | 显示image文件系统信息。device指定image文件的路径 |
| -h | 只显示超级块信息 |
| -x | 将已分组的块的数量用十六进制显示 |
| -v | 显示dumpe2fs的版本号并推出 |
dumpe2fs命令实例
dumpe2fs查看/dev/sda1的文件系统信息。
[root@localhost ~]# dumpe2fs /dev/sda1dumpe2fs 1.41.12 (17-May-2010)Filesystem volume name:Last mounted on: /bootFilesystem UUID: d1488e05-0442-4514-82ff-5f877a51df23Filesystem magic number: 0xEF53Filesystem revision #: 1 (dynamic)Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super huge_file uninit_bg dir_nlink extra_isizeFilesystem flags: signed_directory_hashDefault mount options: user_xattr aclFilesystem state: cleanErrors behavior: ContinueFilesystem OS type: LinuxInode count: 128016Block count: 512000Reserved block count: 25600Free blocks: 465996Free inodes: 127978First block: 1Block size: 1024Fragment size: 1024Reserved GDT blocks: 256Blocks per group: 8192Fragments per group: 8192Inodes per group: 2032Inode blocks per group: 254Flex block group size: 16Filesystem created: Tue Apr 15 04:22:51 2014Last mount time: Tue Sep 16 01:22:26 2014Last write time: Tue Sep 16 01:22:26 2014Mount count: 5Maximum mount count: -1Last checked: Tue Apr 15 04:22:51 2014Check interval: 0 ( )Lifetime writes: 43 MBReserved blocks uid: 0 (user root)Reserved blocks gid: 0 (group root)First inode: 11Inode size: 128Journal inode: 8Default directory hash: half_md4Directory Hash Seed: f562772f-0825-4753-a0b1-5bc295821472Journal backup: inode blocksJournal features: (none)Journal size: 8MJournal length: 8192Journal sequence: 0x00000018Journal start: 0Group 0: (Blocks 1-8192) [ITABLE_ZEROED] Checksum 0xcdec, unused inodes 2015...................略