Linux file system-based file complete deletion method and device

Abstract

The invention provides a linux file system-based file thorough deletion method and apparatus. The method comprises the steps of reading a block group descriptor table of a disk partition where a target file is located, and obtaining an i node table initial block number of each block group according to a content structure of the block group descriptor table; Obtaining corresponding i node information according to the i node number of the target file and the i node table starting block number of the block group; Clearing file data of the target file according to the i node information corresponding to the target file; Cleaning the directory entry of the target file according to the i node information corresponding to the directory entry of the parent directory of the target file; And clearing the log of the file system where the target file is located according to the i node information corresponding to the file system log. According to the method, it can be guaranteed that disk data andtraces of the target file are thoroughly eliminated, logs are deleted, and data recovery through technical means is avoided.

Description

technical field [0001] The invention belongs to the technical field of data cleaning, and in particular relates to a method and device for completely deleting files based on a Linux file system. Background technique [0002] Under the Linux operating system, to delete the files and directories of the machine, usually use the rm command or directly delete through the interface, which cannot completely delete the data. On Linux, you can also use the shred command or wipe to completely delete files, but there are some invalid or not guaranteed effective scenarios, one of which is "record structure or log file system", that is to say, in the ext3 log system data= In journal mode, it is not guaranteed to be valid. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a method, device, terminal and storage medium for completely deleting a file system to solve the above technical problems. [0004] In the first aspect, th...

AI Technical Summary

Problems solved by technology

[0002] Under the Linux operating system, to delete the files and directories of the machine, usually use the rm command or delete directly through the interface, which cannot completely delete the data

On Linux, you can also use the shred command or wipe to completely delete files, but there are some invalid or not guaranteed effective scenarios, one of which is "record structure or log file system", that is to say, in the ext3 log system data= In journal mode, it is not guaranteed to be effective

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