This command allows the system administrator to control the operation
of a name server. If no
is given,
will prompt for commands until it reads EOF.
Options are:
Specifies the rendezvous point for the control channel. The default is
(a UNIX domain socket which is also the server's default control channel).
If the desired control channel is a TCP/IP socket, then the format of the
argument is
(for example,
would be TCP port 54 on the local host.)
This option will
the client side of the control channel to a specific address. Servers can
be configured to reject connections which do not come from specific addresses.
The format is the same as for
(see above).
For backward compatibility with older name servers,
is able to use UNIX signals for control communications. This capability is
optional in modern name servers and will disappear altogether at some future
time. Note that the available
set is narrower when the signal interface is used. A likely
argument would be something like
Turns on debugging output, which is of interest mainly to developers.
Suppresses prompts and result text.
Suppresses nonfatal error announcements.
Turns on protocol and system tracing, useful in installation debugging.
COMMANDS
Several commands are built into
but the full set of commands supported by the name server is dynamic and
should be discovered using the
command (see below). Builtin commands are:
Provides help for builtin commands.
Exit from
command interpreter.
Toggle tracing (see
description above).
Toggle debugging (see
description above).
Toggle quietude (see
description above).
Toggle silence (see
description above).
NOTES
If running in
mode, any arguments to
and
commands are passed to the new
on its command line. If running in
mode, there is no
command and the
command just tells the name server to
itself.
