assetfinder is a command-line tool designed for domain and subdomain discovery during reconnaissance activities. The tool accepts a target domain as input and searches for related domains and subdomains that may be associated with the target organization. It provides options to save results to output files and control the scope of the search through configurable parameters. Key features include: - Subdomain enumeration for a given domain - Output results to specified files - Configurable result limits to control search scope - Multi-threaded operation for improved performance - Command-line interface for integration into security workflows The tool is commonly used in the reconnaissance phase of security assessments to identify potential attack surfaces and discover additional assets belonging to a target organization.