HP-UX Reference (11i v2 07/12) - 1 User Commands N-Z (vol 2)

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nsupdate(1) nsupdate(1)

server statement is provided, nsupdate will send updates to the master server of

the correct zone. The MNAME ﬁeld of that zone’s SOA record will identify the master

server for that zone. port is the port number on servername where the dynamic

update requests get sent. If no port number is speciﬁed, the default DNS port number

of 53 is used.

zone zonename

Speciﬁes that all updates are to be made to the zone zonename.Ifno

zone state-

ment is provided,

nsupdate will attempt to determine the correct zone to update

based on the rest of the input.

prereq nxdomain domain-name

Requires that no resource record of any type exists with name domain-name.

prereq yxdomain domain-name

Requires that domain-name exists (has as at least one resource record, of any type).

prereq nxrrset domain-name class type

Requires that no resource record exists of the speciﬁed type, class, and domain-name.

If class is omitted,

IN (Internet) is assumed.

prereq yxrrset domain-name class type

This requires that a resource record of the speciﬁed type, class, and domain-name

must exist. If class is omitted,

IN (Internet) is assumed.

prereq yxrrset domain-name class type data...

The data from each set of prerequisites of this form sharing a common type, class, and

domain-name are combined to form a set of RRs (resource records). This set of RRs

must exactly match the set of RRs existing in the zone at the given type, class, and

domain-name. The data are written in the standard text representation of the

resource record’s RDATA.

update delete domain-name class type data...

Deletes any resource records named domain-name.Iftype and data is provided, only

matching resource records will be removed. The Internet class (IN) is assumed if

class is not supplied.

update add domain-name ttl class type data..

Adds a new resource record with the speciﬁed ttl, class and data.

local address port

Sends all dynamic update requests using the local address. When no local state-

ment is provided, nsupdate will send updates using an address and port chosen by

the system. port can additionally be used to set a speciﬁc port from where requests

are sent. If port number is not speciﬁed, the system will assign one.

key name secret

Speciﬁes that all updates need to be TSIG signed using the keyname keysecret pair.

The

key command overrides any key speciﬁed on the command line via -y

or -k.

show Displays the current message, containing all the pre-requisites and updates speciﬁed

since the last

send operation.

send Sends the current message. This is equivalent to entering a blank line.

EXAMPLES

The examples below show how nsupdate could be used to insert and delete resource records from the

example.com zone. Notice that the input in each example contains a trailing blank line so that a group

of commands are sent as one dynamic update request to the master name server for example.com .

# nsupdate

> update delete oldhost.example.com A

> update add newhost.example.com 86400 A 172.16.1.1

Any A records for oldhost.example.com are deleted. An A record for newhost.example.com

with IP address 172.16.1.1 is added. The newly-added record has a 1 day TTL (86400 seconds)

HP-UX 11i Version 2: December 2007 Update − 2 − Hewlett-Packard Company 107