Linux shred command to thoroughly smash and delete files

Using the rm DELETE command in linux to delete a file only recycles the inode of the file. This does not mean that the block is completely cleared, for details, refer to my previous blog post "Understanding the linux File System in depth ".

To delete the rm command, we can use tools like ext3grep and photorec before the partition of the deleted file is overwritten into new data. What if we want to completely delete a file?

The shred command is also applicable in the data = ordered (default) anddata = writeback mode of ext3/ext4.

# Shred-f-u-v-z file name

-F change permissions to allow writing if necessary-u truncate and remove file after overwriting-v be verbose (detailed) and show progress-z add a final overwrite with zeros to hide shredding

Unzip shred-f-u-z-vtest.txt

650) this. width = 650; "title =" shred.jpg "alt =" 095301553.jpg" src = "http://www.bkjia.com/uploads/allimg/131228/0015554E2-0.jpg"/>

Although the shred command can safely erase data from the hard disk, note that it cannot be used on bad sectors. In addition, the shred command is more secure to connect to a complete partition path than to get a file name, because some types of file systems will keep backups, and often the shred command will not delete these backup files.

# Shred/dev/sda1

This article is from the "Old Xu's Private food" blog and will not be reposted!