systemd-resolve

SYNOPSIS
       systemd-resolve [OPTIONS...] HOSTNAME...

       systemd-resolve [OPTIONS...] ADDRESS...

       systemd-resolve [OPTIONS...] --type=TYPE RRDOMAIN...

       systemd-resolve [OPTIONS...] --service [[NAME] TYPE] DOMAIN

       systemd-resolve [OPTIONS...] --statistics

       systemd-resolve [OPTIONS...] --reset-statistics

DESCRIPTION
       systemd-resolve may be used to resolve domain names, IPv4 and IPv6
       addresses, DNS resource records and services with the systemd-
       resolved.service(8) resolver service. By default, the specified list of
       parameters will be resolved as hostnames, retrieving their IPv4 and
       IPv6 addresses. If the parameters specified are formatted as IPv4 or
       IPv6 operation the reverse operation is done, and a hostname is
       retrieved for the specified addresses.

       The --type= switch may be used to specify a DNS resource record type
       (A, AAAA, SOA, MX, ...) in order to request a specific DNS resource
       record, instead of the address or reverse address lookups. The special
       value "help" may be used to list known values.

       The --service switch may be used to resolve SRV[1] and DNS-SD[2]
       services (see below). In this mode, between one and three arguments are
       required. If three parameters are passed the first is assumed to be the
       DNS-SD service name, the second the SRV service type, and the third the
       domain to search in. In this case a full DNS-SD style SRV and TXT
       lookup is executed. If only two parameters are specified, the first is
       assumed to be the SRV service type, and the second the domain to look
       in. In this case no TXT RR is requested. Finally, if only one parameter
       is specified, it is assumed to be a domain name, that is already
       prefixed with an SRV type, and an SRV lookup is done (no TXT).

       The --statistics switch may be used to show resolver statistics,
       including information about the number of succesful and failed DNSSEC
       validations.

       The --reset-statistics may be used to reset various statistics counters
       maintained the resolver, including those shown in the --statistics
       output. This operation requires root privileges.

OPTIONS
       -4, -6
           By default, when resolving a hostname, both IPv4 and IPv6 addresses
           are acquired. By specifying -4 only IPv4 addresses are requested,
           by specifying -6 only IPv6 addresses are requested.

       -i INTERFACE, --interface=INTERFACE
           Specifies the network interface to execute the query on. This may
           protocols that may be used. Use this option multiple times to
           enable resolving via multiple protocols at the same time. The
           setting "llmnr" is identical to specifying this switch once with
           "llmnr-ipv4" and once via "llmnr-ipv6". Note that this option does
           not force the service to resolve the operation with the specified
           protocol, as that might require a suitable network interface and
           configuration. The special value "help" may be used to list known
           values.

       -t TYPE, --type=TYPE, -c CLASS, --class=CLASS
           Specifies the DNS resource record type (e.g. A, AAAA, MX, ...) and
           class (e.g. IN, ANY, ...) to look up. If these options are used a
           DNS resource record set matching the specified class and type is
           requested. The class defaults to IN if only a type is specified.
           The special value "help" may be used to list known values.

       --service
           Enables service resolution. This enables DNS-SD and simple SRV
           service resolution, depending on the specified list of parameters
           (see above).

       --service-address=BOOL
           Takes a boolean parameter. If true (the default), when doing a
           service lookup with --service the hostnames contained in the SRV
           resource records are resolved as well.

       --service-txt=BOOL
           Takes a boolean parameter. If true (the default), when doing a
           DNS-SD service lookup with --service the TXT service metadata
           record is resolved as well.

       --cname=BOOL
           Takes a boolean parameter. If true (the default), DNS CNAME or
           DNAME redirections are followed. Otherwise, if a CNAME or DNAME
           record is encountered while resolving, an error is returned.

       --search=BOOL
           Takes a boolean parameter. If true (the default), any specified
           single-label hostnames will be searched in the domains configured
           in the search domain list, if it is non-empty. Otherwise, the
           search domain logic is disabled.

       --legend=BOOL
           Takes a boolean parameter. If true (the default), column headers
           and meta information about the query response are shown. Otherwise,
           this output is suppressed.

       --statistics
           If specified general resolver statistics are shown, including
           information whether DNSSEC is enabled and available, as well as
           resolution and validation statistics.

       --reset-statistics
           Resets the statistics counters shown in --statistics to zero.

       Example 2. Retrieve the domain of the "85.214.157.71" IP address

           $ systemd-resolve 85.214.157.71

       Example 3. Retrieve the MX record of the "0pointer.net" domain

           $ systemd-resolve -t MX 0pointer.net

       Example 4. Resolve an SRV service

           $ systemd-resolve --service _xmpp-server._tcp gmail.com

SEE ALSO
       systemd(1), systemd-resolved.service(8)

NOTES
        1. SRV
           https://tools.ietf.org/html/rfc2782

        2. DNS-SD
           https://tools.ietf.org/html/rfc6763

        3. Link-Local Multicast Name Resolution
           https://tools.ietf.org/html/rfc4795

systemd 229                                                 SYSTEMD-RESOLVE(1)
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