In the Windows operating system, managing file and folder permissions is crucial for maintaining security and controlling access to sensitive data. ICACLS (short for "icacls.exe") is a command-line tool that allows administrators to view, modify, or reset permissions for files and folders. This article will provide an overview of ICACLS and its usage in the Windows environment.

Examples:
1. Viewing File Permissions:
To view the permissions of a file using ICACLS, open the Command Prompt and type the following command:

icacls "C:\path\to\file.txt"

This will display the current permissions for the specified file.

2. Modifying File Permissions:
To modify the permissions of a file using ICACLS, open the Command Prompt and type the following command:

icacls "C:\path\to\file.txt" /grant "Domain\Username:(D,WDAC)"

This command grants the specified user full control over the file.

3. Resetting File Permissions:
To reset the permissions of a file or folder to their default settings using ICACLS, open the Command Prompt and type the following command:

icacls "C:\path\to\file.txt" /reset

This command removes all explicit permissions and restores the inherited permissions.