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

nsupdate(1) nsupdate(1)

# nsupdate

> prereq nxdomain nickname.example.com

> update add nickname.example.com CNAME somehost.example.com

The prerequisite condition gets the name server to check that there are no resource records of any type for

nickname.example.com

. If there are, the update request fails. If this name does not exist, a

CNAME for it is added. This ensures that when the CNAME record is added, it cannot conﬂict with the

long-standing rule in RFC1034 that a name must not exist as any other record type if it exists as a

CNAME.

(The rule has been updated for DNSSEC in RFC2535 to allow CNAMEs to have SIG, KEY and NXT

records.)

WARNINGS

The TSIG key is redundantly stored in two separate ﬁles. This is a consequence of

nsupdate using the

DST library for its cryptographic operations, and may change in future.

FILES

/etc/resolv.conf Used to identify default name server.

Kname.+157.+random.key Base-64 encoding of HMAC-MD5 key created by dnssec-

keygen

Kname.+157.+random.private Base-64 encoding of HMAC-MD5 key created by dnssec-

keygen