Linux disk and File System Management (4) _ File System Properties View modifications

File System Properties View and adjustment tools:

e2label Command : Set the file system volume label to avoid formatting changes to the volume label

E2label device name [Label]

#查看分区卷标 [[email protected] ~]# e2label/dev/sdb1mytest# Modify the partition volume label [[email protected] ~]# e2label/dev/sdb1 ' labelnew ' [email Protected] ~]# e2label/dev/sdb1labelnew

tune2fs Command : Displays the properties of the Ext series file system or modifies its properties

Syntax: TUNE2FS [option] Device name

Parameters:

-L: Show information in Super block

-J: Convert ext2 file system to ext3 file system, join Journal

-l ' label ': Similar to E2label, partition label

-M #: Adjust the percentage of administrative space reserved for administrators

-O: File System Properties start or close

[^]feature[,...]

-O: File system default mount option enabled or closed

[^]mount-option[,...]

Man tune2fs View detailed parameters

Example:

[[email protected] ~]# tune2fs -l /dev/sdb1tune2fs 1.42.9  (28-Dec-2013) filesystem volume name:   labelnew -------> Label last mounted on:           /mnt/test3 -----> mount point filesystem uuid:           e238f3ae-863c-473e-a1ca-35b1e0a69de2Filesystem  magic number:  0xef53filesystem revision #:    1  (Dynamic) filesystem features:      has_journal ext_attr resize_inode  Dir_index filetype needs_recovery extent 64bit flex_bg sparse_super large_ file huge_file uninit_bg dir_nlink extra_isizefilesystem flags:          signed_directory_hash Default mount options:     user_xattr acl ---->  Default mount Options filesystem state:          cleanerrors behavior:          continuefilesystem  os type:       linuxinode count:               65536Block count:               262144Reserved block count:      13107Free blocks:               249189Free inodes:               65524First block:               0Block size:                4096fragment size:&nbSp;           4096group descriptor size:     64reserved gdt blocks:      127blocks per  group:         32768Fragments per group:       32768Inodes per group:          8192inode blocks per group:   512flex block group size:     16Filesystem created:       Tue Sep  15 05:53:15 2015last mount time:           Tue Sep 15 17:07:02 2015Last write time:           Tue Sep 15 17:59:21 2015Mount count:         &Nbsp;     9maximum mount count:      -1last  checked:             Tue Sep  15 05:53:15 2015check interval:            0  (<none>) lifetime writes:          49  MBReserved blocks uid:      0  (user root) Reserved  blocks gid:      0  (group root) first inode:               11Inode size:               256required extra isize:      28desired extra isize:      28journal  inode:             8default directory hash:   half_ md4directory hash seed:       45da449e-ad33-4a49-9660-1469a94cc2f8journal backup:            inode blocks# Modify default mount options: Enable Journal_data[[email protected] ~]# tune2fs -o  journal_data /dev/sdb1tune2fs 1.42.9  (28-dec-2013) [[email protected] ~]#  Tune2fs -l /dev/sdb1 .... Default mount options:    journal_data user_xattr acl ....

dumpe2fs command : Display EXT2/EXT3/EXT4 file System Information

Syntax: dumpe2fs [option] DEVICE

Parameters:

-H: Displays only the Super block information;

-B: Show bad block information

-X: Show detailed group information

Example:

[[email protected] ~]# dumpe2fs -x /dev/sdb1dumpe2fs 1.42.9  (28-Dec-2013) filesystem volume name:   labelnew...super block  information ... Journal start:            0group 0:   (BLOCKS 0X00000000-0X00007FFF)  [itable_zeroed]  checksum 0xba41, unused  inodes 8180  primary superblock at 0x00000000, group descriptors  at 0x00000001-0x00000001  Reserved GDT blocks at  0x00000002-0x00000080  block bitmap at 0x00000081  (+129),  Inode bitmap  at 0x00000091  (+145)   Inode table at 0x000000a1-0x000002a0  (+161 )   28521 free blocks, 8180 free inodes, 2 directories, 8180  unused inodes  free blocks: 0x0000008e-0x00000090, 0x00000099-0x000000a0, 0x000010a2-0x00007fff  free inodes:  0x0000000d-0x00002000 ... Group information ...

If there is any mistake, please correct me!

Thank you!

Linux disk and File System Management (4) _ File System Properties View modifications