How Can I Run SUDO-Requiring Shell Scripts from PHP Without a Password Prompt?

Calling Shell Scripts Requiring SUDO from PHP

Running shell scripts that demand elevated privileges, such as those that require SUDO, can be challenging when invoking them through PHP's shell_exec function. By default, shell_exec doesn't have the necessary permissions to bypass the password prompt.

Solution: Modifying sudoers File

To resolve this issue, you can modify the sudoers file (accessible via visudo) to grant the web server user (e.g., www-data) permission to execute the script without a password. Here's an example rule that can be added to the sudoers file:

www-data ALL=NOPASSWD: /path/to/script

This rule allows the user www-data to run the script /path/to/script without providing a password. Once the sudoers file is updated, you can call the script from PHP using shell_exec as usual.

<?php
$output = shell_exec('/path/to/script');
?>

Caution: Granting excessive permissions in the sudoers file can compromise system security. Ensure you only add rules that are necessary and minimize the scope of granted privileges.

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