如何找出文件系统是如何创建的？

Question

您可以使用以下方法创建文件系统mkfs...- 如何不仅找出给定分区上使用的文件系统，还找出传递给哪些参数mkfs？

那么如何mkfs反向执行——准备好文件系统找出调用。

Answer 1

如果文件系统是 ext2、ext3 或 ext4，那么您可以使用该命令tune2fs来查找设备上给定文件系统的详细信息。

$ sudo tune2fs -l <dev>

例子

$ sudo tune2fs -l /dev/sda2
tune2fs 1.42.8 (20-Jun-2013)
Filesystem volume name:   <none>
Last mounted on:          /boot
Filesystem UUID:          xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
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:              355130
Free inodes:              127934
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 Jul 15 21:26:21 2014
Last mount time:          Fri Sep  5 08:17:04 2014
Last write time:          Fri Sep  5 08:17:04 2014
Mount count:              38
Maximum mount count:      -1
Last checked:             Tue Jul 15 21:26:21 2014
Check interval:           0 (<none>)
Lifetime writes:          172 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:      xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Journal backup:           inode blocks

参数“文件系统功能”列出了您的要求。

我有哪些设备？

您可以使用该命令lsblk列出这些。

85.9G 0 lvm

$ lsblk | head -8 | column -t
NAME           MAJ:MIN  RM  SIZE    RO  TYPE  MOUNTPOINT
sda            8:0      0   238.5G  0   disk
??sda1         8:1      0   200M    0   part  /boot/efi
??sda2         8:2      0   500M    0   part  /boot
??sda3         8:3      0   237.8G  0   part
??fedora-root  253:0    0   50G     0   lvm   /
??fedora-swap  253:1    0   2G      0   lvm   [SWAP]
??fedora-home  253:2    0   185.9G  0   lvm