What is the purpose of the '-r' option in the userdel command?

The '-r' option in the userdel command is specifically designed to remove the user's home directory along with their account. When this option is included in the command, it ensures that all files and directories located within the user's home directory are also deleted, streamlining the process of account removal and ensuring that no residual user data remains on the system in that specific location. This is particularly useful for maintaining system cleanliness and preventing clutter from orphaned files after a user is no longer needed. In this context, the understanding of user account management is crucial for system administration, especially in maintaining security and organization within a multi-user environment.