DNSCHECK(8)DNSCHECK(8)NAME
dnscheck - checks forward and reverse DNS entries
SYNOPSIS
dnscheck [ -c ] [ -h ] [ -t ] [ -v ] [ -x ] [ host ... ]
DESCRIPTION
The dnscheck utility checks the forward and reverse DNS
entries for the given host(s) or for the value returned by
gethostname(2) if the host name or IP address is omitted.
The host argument may be either a normal domain name such
as myhost.foobah.org or an IP address in dotted-quad
[123.234.123.234] form and there may be more than one such
argument given.
The intent of this utility is to run it without any argu-
ments and have it tell you if your system's concept of
what it's name is matches, or is consistent with, what the
DNS thinks is the name of your system. This is useful in
tracking down obscure problems when configuring the Merit
AAA server's clients(5) file.
The forward and reverse information is sent to standard
output followed by any information for multiple address
and or multiple DNS names, one per line. If the host
given is a CNAME then both it and the fully qualified DNS
name are printed along with its IP address. If the host
given is a fully qualified DNS name which has aliases
(CNAMEs), then dnscheck is not able to retrieve these from
the DNS.
OPTIONS-c Toggles checking mode. This option defaults to
"on". If this option is toggled to "off" then the
dnscheck utility will perform only one of the two
checks, either forward or reverse, for the given
host.
-h Prints a usage message.
-t Turns on terse mode. This option defaults to
"off".
-v Shows the RCS version information.
-x This option is used to increase the debugging
level. The debugging level is initially zero.
Each -x option adds to the default, thereby
enabling more and more debugging information to be
produced.
SEE ALSOgethostname(2), clients(5)
4 March 1997 1
DNSCHECK(8)DNSCHECK(8)BUGS
4 March 1997 2