|
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@groups.io. This page was obtained from the project's upstream
Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
2018-02-02. (At that time, the date of the most recent commit that
was found in the repository was 2018-02-02.) 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)
|
HTML rendering created 2018-02-02 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.
|
|