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This article mainly introduces the relevant knowledge of "how Vim encrypts files". The editor shows you the operation process through actual cases, and the operation method is simple, fast and practical. I hope this article "how to encrypt files with Vim" can help you solve the problem.

How to use Vim to protect files with password in Linux

Vim has a-x option that allows you to use it to encrypt files when you create them. Once you run the following vim command, you will be prompted to enter a key:

$vim-x file.txt warning: weak encryption method is being used; see: help 'cm' enter encryption key: * enter the same key again: *

If the key entered the second time is correct, you can modify this file.

Password-protected Vim files

After you have modified it, press Esc and type: wq to save and close the file. The next time you want to open it and edit it, you have to enter the key like this:

$vim file.txt requires encryption key for "file.txt" warning: weak encryption method is being used; see: help 'cm' input key: *

Suppose you type a wrong password (or no password) and you will see some junk characters.

Encrypted content in Vim

Set up a strong encryption method in Vim

Note: the warning indicates that the file is protected by a weak encryption method. So next, let's look at how to set up a strong encryption method in Vim.

Weak encryption of Vim Chinese text

To view the encryption method (cm) set, type:

: help 'cm'

Sample output:

* 'cryptmethod'* *' cm'*'cryptmethod' string (default "zip") global or local to buffer | global-local | {not in Vi} encryption method used when the buffer is written to the file: * pkzip* Zip PkZip compatible mode. A weak encryption method. Backward compatibility with Vim 7.2 and older. * blowfish* blowfish puffer fish encryption. The intermediate strength encryption method has some defects in implementation. Vim 7.3or above is required, and files encrypted with it cannot be read by Vim 7.2or older. It adds a "seed", which is different every time you write to a file.

You can set a new encryption method for a Vim file as shown below (in this case we use the blowfish3s encryption method)

: setlocal cm=blowfish3

Then type enter and: wq to save the file.

Set strong encryption to Vim files

Now you should not see that warning message when you open the file below.

$vim file.txt requires the encryption key of "file.txt" to enter the encryption key: *

You can also set the password after opening the Vim file, and use the: X command to set an encrypted password as shown above.

This is the end of the content about "how Vim encrypts files". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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