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Top Forums Shell Programming and Scripting Telnet of multiple server and ports Post 303019882 by samrat dutta on Monday 9th of July 2018 04:32:34 PM
Old 07-09-2018
Hi,
Using Linux 5 . A change in the script which will take a input file which has servername,port. As telnet was not going into the next item in the file, i used curl instead of telnet. This works. However i am not able to get the output of the script write into the log file properly. I will have to see if i can get the output which only displays in the console be printed in the output.log file.

Input to the file is : serverlist.txt
Code:
tibserver001,9640
tibserver004,9642

Script is :trytelnet.sh -->
Code:
#!/bin/bash

if [[ $# -ne 1 ]]; then
 echo " $0 server list"
exit 1
fi

serverlist=$1
OUT=output.log
rm $OUT > /dev/null 2>&1
while IFS=, read HOST PORT
do
        echo -e "\n\n======================================================================================\n\n"
        echo Working on $HOST
        echo "Checking $HOST on Port $PORT"
        curl $HOST:$PORT --verbose >> $OUT
        echo -e "\n\n======================================================================================\n\n"
done < $serverlist

Execution is :
Code:
./trytelnet.sh serverlist.txt




Moderator's Comments:
Mod Comment Please use CODE tags consistently as required by forum rules!

Last edited by RudiC; 07-09-2018 at 06:06 PM.. Reason: Added missing CODE tags.
 

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TELNET-PROBE(1) 					      General Commands Manual						   TELNET-PROBE(1)

NAME
telnet-probe - lightweight telnet-like port probe SYNOPSIS
$PCP_BINADM_DIR/telnet-probe [-c] [-v] host port DESCRIPTION
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 tel- net 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 ver- bose mode only) and the exit status will be non-zero indicating a failure. PCP ENVIRONMENT
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 configura- tion file, as described in pcp.conf(5). DIAGNOSTICS
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. SEE ALSO
PCPintro(1), pmdashping(1), pmie(1), telnet(1), connect(2), read(2) and write(2). Performance Co-Pilot PCP TELNET-PROBE(1)
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