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# Linux whois Command [ Linux Command Manual](#) The Linux whois command is used to look up and display user information. The whois command searches for and displays user-related information for a specified account. Since it queries the WHOIS database at Network Solutions, the account name must be registered there to be found, and the name is case-insensitive. ### Syntax whois ### Examples Display specified user information # whois root//Look up root user information Query domain description information # whois .Lx138.COmWhois Server Version 2.0Domain names in the .com and .net domains can now be registered with many different competing registrars. Go to http://www.internic.netfor detailed information....Some content is omitted Query domain information # whois Lx138.COmThe Registry database contains ONLY .COM, .NET, .EDU domains andRegistrars.Domain Name ..................... Lx138.COmName Server ..................... dns15.hichina.com dns16.hichina.com Registrant ID ................... hc937242545-cn ...Some content is omitted Query domain information omitting legal disclaimer # whois -H Lx138.COm...Some content is omitted Specify port for query # whois -p 80 Lx138.COm...Some content is omitted [ Linux Command Manual](#)