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NAME | SYNOPSIS | DESCRIPTION | PCP ENVIRONMENT | DIAGNOSTICS | SEE ALSO | COLOPHON |
TELNET-PROBE(1) General Commands Manual TELNET-PROBE(1)
telnet-probe - lightweight telnet-like port probe
$PCP_BINADM_DIR/telnet-probe [-c] [-v] host port
telnet-probe allows the pmdashping(1) daemons to establish
connections to arbitrary local and remote service-providing daemons
so that response time and service availability information can be
obtained.
The required host and port number arguments have the same meaning as
their telnet(1) equivalents.
The -c option causes telnet-probe to perform a connect(2) only. This
skips the read(2) and write(2) exercise that would otherwise be done
after connecting (see below).
The -v option causes telnet-probe to be verbose while operating.
Once the telnet connection has been established, telnet-probe reads
from stdin until end-of-file, and writes all the input data to the
telnet connection. Next, telnet-probe will read from the telnet
connection until end-of-file, discarding whatever data it receives.
Then telnet-probe exits.
To operate successfully, the input passed via telnet-probe to the
remote service must be sufficient to cause the remote service to
close the connection when the last line of input has been processed,
e.g. ending with ``quit'' when probing SMTP on port 25.
By default telnet-probe will not produce any output, unless there is
an error in which case a diagnostic message can be displayed (in
verbose mode only) and the exit status will be non-zero indicating a
failure.
Environment variables with the prefix PCP_ are used to parameterize
the file and directory names used by PCP. On each installation, the
file /etc/pcp.conf contains the local values for these variables.
The $PCP_CONF variable may be used to specify an alternative
configuration file, as described in pcp.conf(5).
If telnet-probe succeeds, then 0 will be returned. If the attempt to
establish a connection fails or is terminated, then a non-zero exit
status is returned.
PCPintro(1), pmdashping(1), pmie(1), telnet(1), connect(2), read(2)
and write(2).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at ⟨http://www.pcp.io/⟩.
If you have a bug report for this manual page, send it to
pcp@oss.sgi.com. This page was obtained from the project's upstream
Git repository ⟨git://git.pcp.io/pcp⟩ on 2017-07-05. If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
Performance Co-Pilot PCP TELNET-PROBE(1)