Linux Basics-File System Management

File System Management

* Re-creating the file system will damage the original file

Mkfs:make File System

-T Fstype

Mkfs-t ext2 = mkfs.ext2

Mkfs-t ext3 = Mkfs.ext3

Specialized in managing EXT series files

Mke2fs

-j: Creating a ext3 Type file system

-B block_size: Specifies the block size, default 4096; Desirable value is 1024,2048 or 4096;

-L lable: Specifies the partition volume label;

-M #: Specifies the percentage of blocks that are reserved for super users;

-I #: To specify how many bytes of space to create an inode, the default is 8192, the value should be the block size of 2^n times;

-N #: Specify Inode Count

-F: Force file system creation;

-E: The user specifies additional file system properties.

Blkid: Querying or viewing disk device-related properties

Uuid

TYPE

lable

E2lable: Used to view or define volume labels

E2lable device File Volume Label: Set Volume label

TUNE2FS: Adjusting the file system's related properties

-J: ext2 upgrade to ext3 without compromising the original data

-L lable: Set or modify the volume label;

-M #: Adjust the reserved percentage;

-R #: Specifies the number of reserved blocks;

-O: Set default mount options;

Cc.

-C #: Specify the number of mounts to the # times after the self-test, 0 or 1 means to turn off this function;

-I #: self-Test with # days after each mount, 0 or 1 means turn off this feature;

-L: Displays the information in the Super block;

DUNMPE2FS: Displaying file property information

-H: Show only information in the Super block

Fsck: Checking and repairing the Linux file system

-T Fstype: Specifying the file system type

-A: Automatic repair

E2FSCK: Dedicated to repairing Ext2/ext3 file system

-F: Forced check

-P: Automatic repair

Swap partition:

Free-m Viewing system memory Status

Create swap partition

Mkswap/dev/sdb1

-L LABEL

Mount/Unload Swap partition

Swapon/dev/sdb1

Swapon-a enable all switching devices defined in the/etc/fstab

Swapoff/dev/sdb1

DD command replication with CP directly on the underlying replication 1 0

if= Data sources

of= Data storage target

bs= Number of bytes

Count= Replication Times

seek=#: Skip space size when creating data files

Backup SDA before 512 bytes and MBR

DD IF=/DEV/SDA Of=/mnt/usb/mbr.bak bs=512 count=1

Restore MBR

DD If=/mnt/usb/mbr.bak OF=/DEV/SDA bs=512 count=1

Linux Basics-File System Management