指令篇：磁盘检查和参数的修改___tune2fs

machine@machine-virtual-machine:~$ fdisk -l /dev/sd
sda   sda1  sda2  sda3  sda5  sda6  sda7  sdb   sdb1  
machine@machine-virtual-machine:~$ tune2fs -l /dev/sda5
tune2fs 1.42.9 (4-Feb-2014)
tune2fs: 权限不够 当尝试打开 /dev/sda5 时
找不到有效的文件系统超级块.
machine@machine-virtual-machine:~$ sudo tune2fs -l /dev/sda5
[sudo] password for machine: 
tune2fs 1.42.9 (4-Feb-2014)
Filesystem volume name:   <none>　　　　　　　　//卷标 （相当于Windows下的D盘的重命名的名字）
Last mounted on:          /
Filesystem UUID:          edd2b532-1560-4804-ab08-509ffee13b50
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
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              625856
Block count:              2499840
Reserved block count:     124992
Free blocks:              1172007
Free inodes:              429995
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      610
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8128
Inode blocks per group:   508
Filesystem created:       Wed May 17 20:56:03 2017
Last mount time:          Sun May 21 00:12:14 2017
Last write time:          Sun May 21 00:12:12 2017
Mount count:              10
Maximum mount count:      -1
Last checked:             Wed May 17 20:56:03 2017
Check interval:           0 (<none>)
Lifetime writes:          13 GB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:              256
Required extra isize:     28
Desired extra isize:      28
Journal inode:            8
First orphan inode:       333696
Default directory hash:   half_md4
Directory Hash Seed:      538aa3cd-eb59-4f51-b7b8-a253efa149b8
Journal backup:           inode blocks
machine@machine-virtual-machine:~$