named - Internet domain name server
named [ -c config-file ] [ -d debug-level ] [ -f ] [ -g ] [ -n #cpus ] [ -p port ] [
-s ] [ -t directory ] [ -u user ] [ -v ] [ -x cache-file ]
named is a Domain Name System (DNS) server, part of the BIND 9 distribution from ISC. For
more information on the DNS, see RFCs 1033, 1034, and 1035.
When invoked without arguments, named will read the default configuration file
/etc/named.conf, read any initial data, and listen for queries.
Use config-file as the configuration file instead of the default, /etc/named.conf.
To ensure that reloading the configuration file continues to work after the server
has changed its working directory due to to a possible directory option in the con-
figuration file, config-file should be an absolute pathname.
Set the daemon's debug level to debug-level. Debugging traces from named become
more verbose as the debug level increases.
-f Run the server in the foreground (i.e. do not daemonize).
-g Run the server in the foreground and force all logging to stderr.
Create #cpus worker threads to take advantage of multiple CPUs. If not specified,
named will try to determine the number of CPUs present and create one thread per
CPU. If it is unable to determine the number of CPUs, a single worker thread will
Listen for queries on port port. If not specified, the default is port 53.
-s Write memory usage statistics to stdout on exit.
Note: This option is mainly of interest to BIND 9 developers and may be removed or
changed in a future release.
chroot() to directory after processing the command line arguments, but before read-
ing the configuration file.
Warning: This option should be used in conjunction with the -u option, as chrooting
a process running as root doesn't enhance security on most systems; the way
chroot() is defined allows a process with root privileges to escape a chroot jail.
setuid() to user after completing privileged operations, such as creating sockets
that listen on privileged ports.
Note: On Linux, named uses the kernel's capability mechanism to drop all root priv-
ileges except the ability to bind() to a privileged port and set process resource
limits. Unfortunately, this means that the -u option only works when named is run
on kernel 2.2.18 or later, or kernel 2.3.99-pre3 or later, since previous kernels
did not allow privileges to be retained after setuid().
-v Report the version number and exit.
Load data from cache-file into the cache of the default view.
Warning: This option must not be used. It is only of interest to BIND 9 developers
and may be removed or changed in a future release.
In routine operation, signals should not be used to control the nameserver; rndc should be
SIGHUP Force a reload of the server.
Shut down the server.
The result of sending any other signals to the server is undefined.
The named configuration file is too complex to describe in detail here. A complete
description is provided in the BIND 9 Administrator Reference Manual.
The default configuration file.
The default process-id file.
RFC 1033, RFC 1034, RFC 1035, rndc(8), lwresd(8), BIND 9 Administrator Reference Manual.
Internet Software Consortium
BIND9 June 30, 2000 NAMED(8)