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System status daemon
|
You must be root to start this daemon. |
rwhod [-i interval] [-u user]
Neutrino
- -i interval
- Specify the broadcast interval in seconds, or in minutes if
interval has a suffix of m.
The default is 3 minutes;
the maximum is 11 minutes because higher values will cause
ruptime
to mark the host as being down.
- -u user
- Drop privileges and become the specified user.
The rwhod daemon is the server that maintains
the database used by the rwho and
ruptime utilities. Its operation is based on the
network's ability to transmit broadcast messages.
The rwhod daemon operates as both a producer and
a consumer of status information. As a producer of
information, it periodically queries the state of the system
and constructs status messages that are broadcast on a
network. As a consumer of information, it listens for other
rwhod daemons' status messages, validating them,
then recording them in a collection of files located in the
directory /var/rwho.
The daemon transmits and receives messages at the port
indicated by the rwho entry in the
/etc/services file.
Messages received by the rwhod daemon are
discarded unless they originated at an rwhod
daemon's port. In addition, if the host's name, as specified
in the message, contains any unprintable ASCII characters,
the message is discarded. Valid messages received by
rwhod are placed in files named
whod.hostname in the directory
/var/rwho. These files contain only the
most recent message, in the format described above.
The rwhod daemon generates status messages about
every three minutes.
The rwhod daemon requires the libsocket.so
shared library.
ruptime,
rwho
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