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Full Discussion: bash script to test network connection - please help
Top Forums Shell Programming and Scripting bash script to test network connection - please help Post 302354905 by shadow_boi on Sunday 20th of September 2009 10:31:53 PM
Old 09-20-2009
bash script to test network connection - please help
I want to test if my host can connect to any of the following 10 hosts (192.168.1.0 to 192.168.1.9)

I didnt know which command i should use, so i chose ping. (i wonder if i should use tracepath or sth else)

my code is the following:

Code:
#!/bin/bash
clear
firstPart="192.168.1"
maxNum="9"

for (( lastPart=0; lastPart<=$maxNum; lastPart++ ))
do
    ipAddr="$firstPart.$lastPart"

    if ping -c 1 -W 1 $ipAddr
    then
        echo "This comp can be connected."
    fi
done


The problem is on this line "ping -c 1 -W 1 $ipAddr"
It would take 10 seconds to check the network connection in the worse case. (if all hosts are not reachable from my host), which is so long.

So i am wondering, if there another approach to accomplish the same thing? Is that possible to use tracepath instead of ping?

Thanks in advance.
 

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LEARN ABOUT DEBIAN

tentacle_client

TENTACLE_CLIENT(1)					   Client file transfer protocol					TENTACLE_CLIENT(1)

NAME

       tentacle_client - a client file transfer protocol

SYNOPSIS

       tentacle_client <options> Tentacle is a client/server file transfer protocol that aims to be:

       -   Executable programs or shell commands
       -   System calls (functions provided by the kernel)
       -   Library calls (functions within program libraries)

       Tentacle  was  created  to  replace  more complex tools like SCP and FTP for simple file transfer/retrieval, and switch from authentication
       mechanisms like .netrc, interactive logins and SSH keys to X.509 certificates. Simple password authentication over a SSL secured connection
       is supported too.

       The  client  and  server  (TCP port 41121) are designed to be run from the command line or called from a shell script, and no configuration
       files are needed.

       Tentacle is now the default file transfer method for Pandora FMS and Babel Enterprise.

       Tentacle is implemented in Perl and ANSI C (Windows platforms included).

       You can download it and get more information at the official Sourceforge website http://tentacled.sourceforge.net/.

OPTIONS

       Tentacle Client options :
	      -a address : Server address (default 127.0.0.1).
	      -c : Enable SSL without a client certificate.
	      -e cert : OpenSSL certificate file. Enables SSL.
	      -f ca : Verify that the peer certificate is signed by a ca.
	      -g : Get files from the server.
	      -h : Show help.
	      -k key : OpenSSL private key file.
	      -p port : Server port (default 41121).
	      -q : Quiet. Do now print error messages.
	      -r number : Number of retries for network operations (default 3).
	      -t time : Time-out for network operations in seconds (default 1s).
	      -v : Be verbose.
	      -w : Prompt for OpenSSL private key password.
	      -x pwd : Server password.

EXAMPLES

       tentacle_client -a 192.168.1.1 -v /bin/bash
	      Simple file transfer with maximum file size set to 1MB

       tentacle_client -a 192.168.1.1 -x password -v /bin/bash
	      Simple file transfer with password authentication (not secure)

       tentacle_client -a 192.168.1.1 -x password -e cert.pem -k key.pem -v /bin/bash
	      Secure file transfer with client certificate and password authentication

NOTES

       Tentacle requires Perl 5.8 or higher to works

SEE ALSO

       tentacle_server(1), pandora_server(1), pandora_agent(1)

0.2.0								    2010-05-11							TENTACLE_CLIENT(1)
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