File recovery method and device of linux system

Abstract

The invention discloses a file recovery method and device of a linux system. The file recovery method and device of the linux system are used for recovering Ext4 files which are deleted through rm by mistake on a linux server, and avoiding enormous losses caused due to the fact that important data of the server are lost. The method includes the steps that after file data of an Ext4 file system are deleted by mistake, a disk partition where the file data which are deleted by mistake are located is recorded as a disk partition to be recovered; a root directory of the linux system is switched to; the position of the disk partition to be recovered is sought for in a directory tree to obtain position information; the disk partition to be recovered is unloaded according to the position information; an inode value is check to confirm that the file data which are deleted by mistake are located in the root directory of the linux system at present; a disk traversal tool is downloaded and installed; the disk partition to be recovered is traversed, a list of all files with invalid inode information is obtained, and the file data which are deleted by mistake are found out; the inode information corresponding to the file data which are deleted by mistake is changed to be valid.

Description

Technical field [0001] The invention relates to the field of computer technology, in particular to a file recovery method and device of a linux system. Background technique [0002] Linux is a free-to-use and freely disseminated Unix-like (Eunice) operating system. It is a multi-user, multi-tasking, multi-threaded and multi-CPU operating system. It supports 32-bit and 64-bit hardware. Linux inherits Unix's network-centric design philosophy and is a multi-user network operating system with stable performance. [0003] The basic idea of ​​Linux has two points: first, everything is a file; second, every software has a certain purpose. The first one in detail is that everything in the system comes down to one file, including commands, hardware and software devices, operating systems, processes, etc. For the operating system kernel, they are all regarded as files with their own characteristics or types. . [0004] There are three types of Linux file systems: Ext 2, Ext 3, and Ext 4. ...

AI Technical Summary

Problems solved by technology

[0006] The software deleted through the graphical interface on the Linux server is generally recoverable in the recycle bin, but the data deleted through the command line with the "rm-rf*" command is difficult to recover

Disks in Ext2 file format can usually be recovered by "debugfs tool", and disk data in Ext3 file format can be recovered by "ext3rescue tool". However, due to the disk structure of Ext4 format, the previous recovery tools cannot be used directly. Currently, Ext4 format can be recovered Disk data recovery is very difficult

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