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Install mhash And mcrypt in Linux

mhash and mcrypt are libraries that provide hashing, cryptography, and encryption functionality for various applications. They are commonly used to enhance security in web applications. In this tutorial, we will guide you through the process of installing mhash and mcrypt on a Linux system.

1. Update your system

Before installing mhash and mcrypt, make sure your system is up-to-date. Run the following commands to update the package index and upgrade installed packages:

For Debian-based systems (e.g., Ubuntu, Debian):

sudo apt-get update
sudo apt-get upgrade

For RHEL-based systems (e.g., CentOS, Fedora):

sudo yum update

2. Install mhash

To install the mhash library, run the following command:

For Debian-based systems:

sudo apt-get install libmhash-dev

For RHEL-based systems:

sudo yum install mhash-devel

3. Install mcrypt

To install the mcrypt library, run the following command:

For Debian-based systems:

sudo apt-get install libmcrypt-dev

For RHEL-based systems:

sudo yum install libmcrypt-devel

4. Install mcrypt PHP extension (optional)

If you're using PHP and want to use the mcrypt extension, you need to install it. For PHP 7.2 and earlier, the mcrypt extension is available in the official package repositories. For PHP 7.3 and later, you need to use the PECL repository.

Install mcrypt for PHP 7.2 and earlier:

For Debian-based systems:

sudo apt-get install php-mcrypt

For RHEL-based systems:

sudo yum install php-mcrypt

Install mcrypt for PHP 7.3 and later:

First, install the required PHP development tools and libraries:

For Debian-based systems:

sudo apt-get install php-dev php-pear

For RHEL-based systems:

sudo yum install php-devel php-pear

Next, use the PECL command to install the mcrypt extension:

sudo pecl install mcrypt

Finally, enable the mcrypt extension by adding the following line to your php.ini file:

extension=mcrypt.so

Restart your web server (e.g., Apache or Nginx) for the changes to take effect.

That's it! You have successfully installed mhash and mcrypt on your Linux system. These libraries can now be used to enhance the security of your applications through hashing, encryption, and cryptography.

Installing mhash and mcrypt on Ubuntu/Linux:

# For Ubuntu/Debian
sudo apt update
sudo apt install libmcrypt-dev
sudo apt install libmhash-dev

# For CentOS/Red Hat
sudo yum install epel-release
sudo yum install libmcrypt-devel
sudo yum install mhash-devel

Enable mcrypt extension in PHP on Linux:
- For PHP 7.2 and earlier, add the following line to your php.ini file:
```
extension=mcrypt.so
```
- For PHP 7.3 and later, mcrypt is deprecated. Consider using sodium extension.
Adding mhash and mcrypt support to Apache on Linux:
- For Apache, you might need to restart the Apache server after enabling the extensions in PHP.
```
sudo systemctl restart apache2    # For Ubuntu/Debian
sudo systemctl restart httpd      # For CentOS/Red Hat
```

Install libmcrypt and mhash in CentOS:

sudo yum install epel-release
sudo yum install libmcrypt-devel
sudo yum install mhash-devel

Compiling and installing mhash and mcrypt from source on Linux:
- Download and extract the source code.
- Navigate to the extracted directory.
```
./configure
make
sudo make install
```