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Directory 1. Grub plaintext encryption;Ii. MD5 encryption method of grub; 1. Use the grub-md5-crypt to generate the MD5 password of grub; 2. Change/etc/grub. conf Iii. About this articleIv. ReferencesV. Related Documents ++ ++Body++ ++ 1. Grub

This article mainly introduces the Linux system passwd command Practical Tips Summary, is the basic knowledge of Linux primer learning, the need for friends can refer to the following Let 's review the basic usage of the passwd command: linux passwd

Password hash security, password hash Hash is usually translated as "hash", and is also directly translated as "hash", that is, input of any length (also called pre- ing), through the hash algorithm, convert to a fixed-length output, which is a hash

/** * One-way string encryption algorithm cannot be used as password encryption */ if (crypt_std_des = = 1) { echo "Standard DES:". Crypt ("Hello World"). " \ n "; } Else { echo "Standard DES not supported.\n"; } if (crypt_ext_des = = 1) { echo

Simple implementation of PHP encryption technology and php encryption technology 1. MD5 Encryption Take a logon page as an example: "; }else { echo "Failure!"; echo ""; }}elseif ($act=='login') { $sql="SELECT * FROM user WHERE

classCrypthelper {/** * Encryption * @param unknown $password * @param unknown $salt * @return String*/ public Static function Crypt($password,$salt){ //$saltPrefix. = ' $2y$ ';//Blowfish algorithm//$saltPrefix. = ' 13 ';//two-bit cost

Example of the passwd command in 10 Linux As shown in the passwd command name, it is used to change the password of the System user. If the passwd command is executed by a non-root user, it will ask the current user's password and then set the new

Summary of practical skills for passwd commands in CentOSThis article mainly introduces the practical tips of passwd commands in Linux. It is the basic knowledge in Linux beginners. If you need it, let's take a look at the basic usage of passwd

Usermod command parameters and usage details (Linux Modify user account information command)Linux usermod command parameters and usage details, Linux Modify user account Information command, USERMOD can be used to modify the user account

The source code is as follows:#include #include intMainintARGC, Char*ARGV[]){if(ARGC! =3){printf("%s \n", argv[0]);return-1; } Char*passwd=Crypt(argv[1],argv[2]);printf("passwd: %s\ n", passwd);return 0;}Summarize:Char*crypt (Const Char*Key,Const

Let's review the basic usage of the passwd command: The Linux passwd command is used to change the user's password Grammar passwd [-K] [-l] [-u [-f]] [-d] [s] [username] Necessary parameters: -D Delete Password -F Enforcement -K updates can

Experiment Preparation: This experiment is implemented on two CentOS hosts, one as FTP server and one for database server . A CentOS-7 when MySQL server One CentOS-6 when FTP serverNote that here who when the FTP server is critical,

Source code such as the following:#include #include intMainintARGC, Char*ARGV[]){if(ARGC! =3){printf("%s \n", argv[0]);return-1; } Char*passwd=Crypt(argv[1],argv[2]);printf("passwd: %s\ n", passwd);return 0;}Summarize:char *crypt (const char

Based on MySQL database authentication Description: This experiment is implemented on two CentOS hosts, one as FTP server and one for database server. Both the database server and the FTP server system are CENTOS7 Note: If it is a

In the use of PHP to develop Web applications, many applications will require users to register, and the registration of the time we need to deal with the user's information, the most common is the mailbox and password, this article is intended to

$var= 123; /** * MD5 encryption (single encryption, irreversible) * param $var variables (int\float\string\bool\null) that require encryption, resource type (Resource), and composite type (AR Ray\object) Non-encrypted * param false: Encrypted to

[Laravel5.2 documentation] service-encryption 1. configuration Before using Laravel encryptor, set the key option to a 32-bit random string in config/app. php of the configuration file. If this value is not set, all Laravel encrypted values are

1. Install MySQL using yum# Yum-y install mysql-servermysql-devel2. Start the MySQL service and modify the MySQL administrator password.# Service mysqldstart# Mysql_secure_installation // set the root administrator password3. Create a MySQL database

FTP service: network sharing, ftp service network sharingPreface This time I will talk about some ftp services that are commonly used in our daily lives.How to Set Up ftp services and manage them. FTP FTP: File Transfer Protocol (File Transfer

In the development process of the website, we often need to encrypt some data (such as user password), this article mainly introduces several common cryptographic functions of PHP. MD5 Encryption: String MD5 (string $str [, bool $raw _output =