| Tools to delete files securely in ubuntu Linux |
| 摘自: www.ubuntugeek.com 被阅读次数: 158 |
由 yangyi 于 2009-07-03 23:03:56 提供 |
Deleting a file or reformatting a disk does not destroy your sensitive data. The data can easily be undeleted. That’s a good thing if you accidentally throw something away, but what if your trying to destroy financial data, bank account passwords, or classified company information. In this article you will learn number of tools to delete files securely in ubuntu Linux 1) Shred Although it has some important limitations, the shred command can be useful for destroying files so that their contents are very difficult or impossible to recover. shred accomplishes its destruction by repeatedly overwriting files with data patterns designed to do maximum damage so that it becomes difficult to recover data even using high-sensitivity data recovery equipment1. Deleting a file with the rm command does not actually destroy the data; it merely destroys an index listing the location of the file and makes the file’s data blocks available for reuse. Thus, a file deleted with rm can be easily recovered using special utilities or commands if its freed data blocks have not yet been reused. However, on an active system with a nearly full hard disk drive (HDD), freed space can be reused in a matter of minutes or even seconds. Shred Syntax
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