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optional arguments:
  -h, --help            show this help message and exit
  -d DOMAIN, --domain DOMAIN
                        company name or domain to search
  -l LIMIT, --limit LIMIT
                        limit the number of search results, default=500
  -S START, --start START
                        start with result number X, default=0
  -g, --google-dork     use Google Dorks for Google search
  -p, --port-scan       scan the detected hosts and check for Takeovers
                        (21,22,80,443,8080)
  -s, --shodan          use Shodan to query discovered hosts
  -v, --virtual-host    verify host name via DNS resolution and search
                        for virtual hosts
  -e DNS_SERVER, --dns-server DNS_SERVER
                        DNS server to use for lookup
  -t DNS_TLD, --dns-tld DNS_TLD
                        perform a DNS TLD expansion discovery, default
                        False
  -n, --dns-lookup      enable DNS server lookup, default False
  -c, --dns-brute       perform a DNS brute force on the domain
  -f FILENAME, --filename FILENAME
                        save the results to an HTML and/or XML file
  -b SOURCE, --source SOURCE
                        baidu, bing, bingapi, certspotter, crtsh,
                        dnsdumpster, dogpile, duckduckgo, github-code,
                        google, hunter, intelx, linkedin, linkedin_links,
                        netcraft, otx, securityTrails, spyse(disabled for
                        now), threatcrowd, trello, twitter, vhost,
                        virustotal, yahoo, all

theHarvester -d bbskali.cn -l 500 -b baidu