Name
host
Synopsis
host [options
]host
[server
] host [options
]domain
[server
]
Prints 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, refer to Chapters 1 and 2 of DNS and BIND (O’Reilly).
Options
- -a
All, same as -t
ANY
.-
-c
class
Search for specified resource record class (in[ternet], cs[net], ch[aos], hs/hesiod, or any). Default is in. The chaos and csnet classes, although defined in RFC1035, are rejected as invalid classes by the host command.
- -C
Print the SOA (start of authority) records for the host.
- -d
Verbose. Same as -v.
-
-l
domain
List all machines in
domain
.- -r
No recursion. Don’t ask contacted server to query other servers, but require only the information that it has cached.
- -s
Chase signatures back to parent key (
DNSSEC
).-
-t
type
Look for
type
entries in the resource record. Acceptable values fortype
are: a, ns, md, mf, cnames, soa, mb, mg, mr, null, wks, ptr, hinfo, minfo, mx, any, and * (careful, the shell loves those asterisks; be sure to escape them).- -v
Verbose. Include all fields from the resource record, even time-to-live and class, as well as “additional information” and “authoritative nameservers” (provided by the remote nameserver).
- -w
Wait forever for a response from a queried server.
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