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This article mainly explains "how to delete files completely under Linux". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to delete files thoroughly under Linux".

Linux is easy to delete directories, and many people are still used to using rmdir, but once the directory is not empty, they are in deep trouble. Now you can use the rm-rf command.

Rm is fine, but you need to add two parameters-rf: rm-rf directory name

Delete directories, files rm (remove)

Function description: delete files or directories.

Syntax: rm [- dfirv] [--help] [--version] [file or directory.]

Add: execute rm directive to delete files or directories, if you want to delete directories, you must add the parameter "- r", otherwise the default will only delete files.

Parameters:

-d or-directory delete the hard connection data of the directory you want to delete directly to 0, and delete the directory.

-f or-force forces the deletion of a file or directory.

-I or-interactive asks the user before deleting an existing file or directory.

Recursive processing of-r or-R or-recursive, processing all files and subdirectories under the specified directory together.

-v or-verbose displays the instruction execution process.

1 Delete a folder

De > rm-rf fileNamede >

-Delete a folder instance:

Rm-rf / var/log/httpd/access

The / var/log/httpd/access directory and all files and folders under it will be deleted

Need to be reminded: you must be very careful when using this rm-rf. Linux does not have a Recycle Bin.

2 delete files

De > rm-f fileNamede >

Be careful when using rm-rf. Linux does not have a Recycle Bin.

Delete files other than the specified file

1. Common commands for deleting files and folders under Linux are as follows:

Delete files: rm file

Delete folder: rm-rf dir

It should be noted that rmdir can only delete empty folders.

Second, delete all documents except the formulation document (folder)?

1. Method 1, the more troublesome approach is:

Copy the files that need to be retained to another folder, then delete the directory, and then move the files that need to be retained back.

Mv keep.. / # keep files (folders) keep

Rm-rf * # Delete all files in the current folder

Mv.. / keep. / # move the original things back

2. Method 2, which needs to be done in the current folder:

Rm-rf! (keep) # Delete all files except the keep file

Rm-rf! (keep1 | keep2) # Delete all files except keep1 and keep2 files

Completely delete files in Linux

Shred's method of deleting files completely:

$shred-u file

Shred overwrites the node and data block where the file is located with some random content and deletes the file (the-u parameter).

If you want to clear it more thoroughly, you can add the-z parameter, which means to fill it with random data first and then with 0 at last.

$shred-u-z file

In addition, shred can also clear the entire partition or disk, for example, if you want to completely clear the contents of the / dev/sdb1 partition, you can do this:

$shred / dev/sdb1 (do not add the-u parameter)

Detailed parameters of shred:

-f,-- force changes permissions to allow writes (if necessary)

-n,-- iterations=N is rewritten N times. Default is 3 times.

-- random-source=FILE reads data from the specified file

-s,-- size=N shredded the file to a fixed size (suffixes such as K, M, C, etc.)

-u,-- remove truncates and removes files after rewriting

-v,-- verbose shows progress

-z,-- zero-add overwrites data with 0

-help display help

-version displays version information

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