Use the PHP script to encrypt strings using the md5 function in Linux.

Use the PHP script to encrypt strings using the md5 function in Linux.

# Touch a. php // create a. php file # vi a. php // use vi to edit the. php file

Set <? Php echo md5 (123456);?> Input and save

# Php a. php // run the. php file

Display: e10adc3949ba59abbe56e057f20f883e

A. in linux or Unix, md5sum is A tool program used to calculate and verify the file message digest. Generally, after Linux is installed, the md5sum tool runs directly on the command line terminal. You can use the following command to obtain the md5sum command to help man md5sum

#md5sum –help

There is a prompt: "With no FILE, or when FILE is-, read standard input. "If the input file option is not available or the file option is-, the input content is read from the brick." This means that the string can be read directly from the keyboard for encryption.

How to encrypt a string using md5sum

# Md5sum // press ENTER 123456 // enter 123456. Press ctrl + d twice.

Display:

 Copy codeThe Code is as follows: 123456e10adc3949ba59abbe56e057f20f883e red represents the encrypted value

You can also use the pipeline command:

 Copy codeThe Code is as follows: # echo-n '000000' | md5sum

 

Or write an md5 encryption script named md5.sh,

Copy the following content to the script:

 Copy codeThe Code is as follows :#! /Bin/bash

Echo-n $1 | md5sum | awk '{print $1 }'

 

Save and grant the script execution permission.

 Copy codeThe Code is as follows: # sh md5.sh 123456

Display: e10adc3949ba59abbe56e057f20f883e

B. You can also put the text into a text file and use md5sum to encrypt and modify the text. You can also obtain the string-encrypted value. The process is as follows:

 Copy codeThe Code is as follows: # touch a.txt

# Echo-n 123456> a.txt // write 123456 to a text file. The-n parameter cannot be lost to avoid interference with carriage return characters.

# Md5sum a.txt

Display: e10adc3949ba59abbe56e057f20f883e a.txt

 

Ctrl + d has two meanings:

The first is to send the object input Terminator EOF to the program.

Second, send the exit command to the program. After the program receives the signal, the specific action is to end the input, wait, or exit directly. It depends on how the program operates after capturing the signal.
Md5sum is the first meaning. Two strl + d times. The first time you read the EOF command, the second capture will be treated as the exit command. Shell programs directly parse ctrl + d as Exit commands.