Linux|dumpe2fs命令 shell|dumpe2fs|dumpe2fs命令|shell命令

【Linux|dumpe2fs命令】 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/sda1 dumpe2fs 1.41.12 (17-May-2010) Filesystem volume name: Last mounted on:/boot Filesystem UUID:d1488e05-0442-4514-82ff-5f877a51df23 Filesystem magic number:0xEF53 Filesystem 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_isize Filesystem flags:signed_directory_hash Default mount options:user_xattr acl Filesystem state:clean Errors behavior:Continue Filesystem OS type:Linux Inode count:128016 Block count:512000 Reserved block count:25600 Free blocks:465996 Free inodes:127978 First block:1 Block size:1024 Fragment size:1024 Reserved GDT blocks:256 Blocks per group:8192 Fragments per group:8192 Inodes per group:2032 Inode blocks per group:254 Flex block group size:16 Filesystem created:Tue Apr 15 04:22:51 2014 Last mount time:Tue Sep 16 01:22:26 2014 Last write time:Tue Sep 16 01:22:26 2014 Mount count:5 Maximum mount count:-1 Last checked:Tue Apr 15 04:22:51 2014 Check interval:0 () Lifetime writes:43 MB Reserved blocks uid:0 (user root) Reserved blocks gid:0 (group root) First inode:11 Inode size:128 Journal inode:8 Default directory hash:half_md4 Directory Hash Seed:f562772f-0825-4753-a0b1-5bc295821472 Journal backup:inode blocks Journal features:(none) Journal size:8M Journal length:8192 Journal sequence:0x00000018 Journal start:0 Group 0: (Blocks 1-8192) [ITABLE_ZEROED] Checksum 0xcdec, unused inodes 2015 ...................略