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Special Forums IP Networking Help with to check the tcp network connectivity between servers and hosts Post 302904087 by sknovice on Monday 2nd of June 2014 04:58:38 AM
Old 06-02-2014
Hello,

My below code still not working, if the connection is rejected , the output is not appending to the output file.

code:
Code:
#!/bin/bash
#read the file line by line

cd "$1"
cat testping.txt | while read line
do
        # check if there are no blank lines
        if [ ! -z $line ]; then
                hosts=${line//:/ }
                nc -z $hosts >> testoutput.txt 2>&1
        fi
done


if there is any hosts with connection rejected, the entry is not available in the oyutput file.

please help.
 

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HOSTS(5)							File Formats Manual							  HOSTS(5)

NAME
hosts - hostname to IP address database SYNOPSIS
/etc/hosts DESCRIPTION
The hosts database lists the IP addresses and the hostnames that translate to these IP addresses. It is used by nonamed(8) in a network without name servers. A simple /etc/hosts may look like this: 127.0.0.1 localhost 192.9.200.1 darask 192.9.200.2 burask The localhost entry lists a special address that refers to the local host itself (a kind of /dev/tty for hosts.) You should only list it if nonamed needs it! The other entries are actual machines. The file may contain comments marked with '#'. You can have aliases (more hostnames on the same line), but it is not recommended, because nonamed can't present them to the system as CNAME records. An often seen form like 192.9.200.1 darask.home.cs.vu.nl darask is harmless though, and has the small advantage that you can use the short name in /etc/ethers so rarpd can match it at boot time. FILES
/etc/hosts Hosts database. SEE ALSO
ethers(5), nonamed(8), rarpd(8), boot(8). AUTHOR
Kees J. Bot (kjb@cs.vu.nl) HOSTS(5)
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