HP-UX Reference (11i v2 03/08) - 1 User Commands N-Z (vol 2)

nsupdate(1) nsupdate(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)

# 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.)

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.