# sublist3r > Fast subdomains enumeration tool for penetration testers. > More information: . - Find subdomains for a domain: `sublist3r --domain {{domain_name}}` - Find subdomains for a domain, also enabling brute force search: `sublist3r --domain {{domain_name}} --bruteforce` - Save the found subdomains to a text file: `sublist3r --domain {{domain_name}} --output {{path/to/output_file}}` - Output all available options: `sublist3r --help`