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
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).
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
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).
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
firstname.lastname@example.org. This page was obtained from the project's upstream
Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
2020-06-09. (At that time, the date of the most recent commit that
was found in the repository was 2020-06-09.) 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
Performance Co-Pilot PCP TELNET-PROBE(1)