Main index | Section 1 | 日本語 | Options |
name is the domain name that is to be looked up. It can also be a dotted-decimal IPv4 address or a colon-delimited IPv6 address, in which case host will by default perform a reverse lookup for that address.
When name is not provided, host prints a short summary of it's usage.
server is an optional argument which is either a domain name or an IP address of the name server that host should query instead of the server or servers listed in /etc/resolv.conf. When server is a domain name, system resolver is used to obtain it's address.
Supported options:
| |
Make a verbose query of type
ANY.
Equivalent to
| |
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Query for SOA records for zone name from all of it's authoritative name servers. The list of name servers is obtained via NS query for name. | |
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Perform DNS query of class class. Recognized classes are IN (Internet), CH (Chaosnet), HS (Hesiod), NONE, ANY and CLASSN (where N is a number from 1 to 255). Default is IN. | |
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Produce verbose output. This is a synonym for
| |
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Use IP6.INT domain for reverse lookups of IPv6 addresses (as defined in RFC1886; note that RFC4159 deprecates IP6.INT). By default IP6.ARPA is used. | |
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List all
NS, PTR, A
and
AAAA
records in zone
name
by performing a zone transfer
( AXFR).
You can combine this option with
| |
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Consider names with at least this many dots as absolute. That is, try to resolve them directly before consulting domain or search options from /etc/resolv.conf. | |
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Perform non-recursive query to the name server by clearing RD ("recursion desired") bit of the query. | |
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Retry this many times when a query does not receive an answer in time. The default is 1 retry. If number is negative or zero, 1 is used instead. | |
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Report SERVFAIL responses as they are, do not ignore them. | |
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Query name server over TCP. By default UDP is used, except for AXFR and IXFR queries, which require TCP. host will also retry UDP queries in TCP mode if the UDP response was truncated (i.e. had TC bit set). | |
| |
Perform DNS query of type
type,
which can be any standard query type name
( A, CNAME, MX, TXT, etc),
a wildcard query
( ANY),
or
TYPEN,
where
N
is a number from 1 to 65535. For
IXFR (incremental zone transfer)
queries the starting serial number can be specified by appending
an equal sign followed by the number
(e.g.
The default is to query for
A, AAAA, and MX
records, unless
| |
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Produce verbose output. | |
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Wait forever (or for a very long time) for response from the name server. | |
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Wait this many seconds for a reply from name server before timing
out. If
wait
is negative or zero, value of 1 is used. The default is to wait
10 seconds for TCP connections, and 5 seconds for UDP (both are
subject to retries, see option
| |
| |
Only use IPv4 transport. | |
| |
Only use IPv6 transport. | |
HOST (1) | Aug 27, 2012 |
Main index | Section 1 | 日本語 | Options |
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