sh(1),
and have used muxcat(11) to access
an RFC
1078
data service.
It also assumes that you can read the manual page for any other example command.
muxsend?muxsend says it sends a stream to a TCPMUX-like
service. That's all it does. It accepts a stream of bytes, usually on
stdin, which is copies to a network service.
There is no sense of intent here; the service could do anything
at all with the data sent. For example the payload might record a
attempt to run a bad sudo command, or it might
be a message to an operator.
Since such services almost always have local scope, it is impossible to provide a comprehensive list of services and their intent. So we'll have to make-do with some examples.
Usaully the name of the service indicates the intent of the service.
The local services diag and
storage are used to record the diagnostics
(e.g. dmidecode data and the like) and
disk space available (e.g. lvm and such)
for each host as it finishes a weekly checkout. Another task on the
collector host produces trend, error, and usage reports later from a
cron job.
These same reports could be send over
e-mail (received via procmail) or
via anonymous FTP.
We use recvmux (see the
manual page) to
catch the data because we encode the source host in a format
that program knows how to decode.
storage service is a good example.
As new instances (VMs, hard-hosts, zones, or jails) come on-line they may
report their inherent storage capcaity and total presently allocated.
This information may be updated weekly or daily depending on the
growth (percentage change) and available capacity.
This feed-back loop checks some basic assumptions:
recvmux
HTML document and
the muxcat
HTML document and
$Id: muxsend.html,v 1.1 2012/08/20 21:26:48 ksb Exp $