Web host server - –version Output version information and then exit. Examples
–version Output version information and then exit. Examples Display the first 20 lines of phone_list: head -20 phone_list Display the first 10 phone numbers having a 202 area code: grep ‘(202)’ phone_list | head host host [options] host [server] host [options] zone [server] System administration command. Print information about specified hosts or zones in DNS. Hosts may be IP addresses or hostnames; host converts IP addresses to hostnames by default and appends the local domain to hosts without a trailing dot. Default servers are determined in /etc/resolv.conf. For more information about hosts and zones, try Chapters 1 and 2 of DNS and BIND by Paul Albitz and Cricket Liu, published by O’Reilly & Associates. Options -a Same as -t ANY. -c class Search for specified resource record class (IN, INTERNET, CS, CSNET, CH, CHAOS, HS, HESIOD, ANY, or *). Default is IN. -d Debugging mode. -dd is a more verbose version. -e Do not print information about domains outside of specified zone. For hostname queries, do not print “additional information” or “authoritative nameserver.” -f file Output to file as well as standard out. -i Given an IP address, return the corresponding in-addr.arpa address, class (always PTR), and hostname. -l zone List all machines in zone. -m Print only MR, MG, and MB records; recursively expand MR (renamed mail box) and MG (mail group)