In the Linux file system, many people do not understand Inode. today I will share with you my understanding of Inode. if there is something wrong with understanding Inode, please give me more criticism. One day in the previous article, I learned
In the Linux file system, many people do not understand Inode. Today I will share with you my understanding of Inode. If there is something wrong with understanding Inode, please give me more criticism.
One day in the previous article, I learned
1. Initial knowledge of the Inode:The file is stored on the hard disk (the minimum storage unit of the hard disk is "sector" (sector), 512 bytes per sector)When the operating system reads the hard disk, it reads a block (8 sector) at once.The
Example: The system to find the file/var/log/messages processThe kernel knows the inode number, according to the inode can be found/corresponding disk block, the disk block has/below the directory and corresponding inode number, and then according
I. Understanding the EXT2 file System: A, the composition of the hard disk: rotating small motor + storage disk + read/write picker B, some concepts of disk & nbsp sector is the smallest physical storage unit, each sector is 512b
The function link, linkat, unlink, Unlinkat, and remove instance programs open a file and then unlink it. The process that executes the program then sleeps for 30 seconds and then terminates.
#include "apue.h"
#include
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The file system on Linux is generally EXT2 or EXT3, but this article is not ready to talk about them directly, but I want to combine the Linux operating system and from the foundation of the file system-the hard disk to start, step-by-step
In UNIX systems, everything except processes is a file, which is maintained by Linux. To facilitate file management, Linux also introduces the concept of directories (sometimes called folders. Directory enables file classification and management,
Soft link and hard link details
Today, we will introduce the following soft links and hard links.
I. What is inode?
To understand inode, start with file storage.
1. The file is stored on the hard disk. The minimum storage unit of the hard disk is 51
In your spare time, If You Want To Know ubifs, start by translating the ubifs design document. You will have the opportunity to analyze the ubifs source code later.
The flash memory file system needs to be updated remotely (out-of-place updates).
Linux systems have soft links and hard links, so-called soft links similar to Windows system shortcuts, if the source file is deleted, soft links will fail. The hard link is different, even if the source file is deleted, the file still exists, this
This paper describes the method of InnoDB data recovery in the case of MySQL exception recovery without primary key. Share to everyone for your reference, specific as follows:
MySQL in the InnoDB engine database abnormal recovery, generally require
Translator Note: Recently in the file system-related, whenever you read the inode related things, the book or blog will be related to hard link/soft link content, so today specifically for hard links translated a few English, understand it. One,
Linux-EXT2 file system details
File System features
For example, the Microsoft operating system before Windows 98 mainly uses the file system FAT (or FAT16). Versions later than Windows 2000 have the so-called NTFS file system, for Linux, the
Inode
Before discussing the Linux system connection, I have to talk about inode first. Each object in the Linux file system has a unique inode index. Each inode number corresponds to one object in the file system, to view the inode number of a file
In centos, you can use the rm command to delete files. However, if you want to delete a file with garbled file names, you cannot directly use the rm command because the file name cannot be output at all. However, the find command can be used to
*inode*When we need to open a file, often enter the command to open the file plus file name, the operating system will go to the hard disk to find the corresponding file, it should be known that the Unix/linux system does not use the file name to
Two articles have previously reviewed the structure of the linux Virtual File System and the process of reading and writing linux files. Some of the implementations by specific file system types are not described in detail, but they are implemented
Two articles have previously reviewed the structure of the linux Virtual File System and the process of reading and writing linux Files. Some of the implementations by specific file system types are not described in detail, but they are implemented
• Inode
Before discussing the Linux system connection, I have to talk about inode first. Each object in the Linux file system has a unique inode index. Each inode number corresponds to one object in the file system, to view the inode number of a
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