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Help with to check the tcp network connectivity between servers and hosts

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Special Forums IP Networking Help with to check the tcp network connectivity between servers and hosts
# 8  
Old 06-01-2014
What is this construct:'(nc -zv $hosts)'? If you want to use command substitution, use $(...). That will make the exit code available via $? as well. You may need to redirect stderr to stdout to capture the error msg.
# 9  
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.
# 10  
Old 06-02-2014
Quote:
Originally Posted by sknovice
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.
Try changing:
Code:
        if [ ! -z $line ]; then
                hosts=${line//:/ }
                nc -z $hosts >> testoutput.txt 2>&1

to:
Code:
        if [ ! -z "$line" ]; then
                hosts=${line//:/ }
                nc -z $hosts 2>&1 >> testoutput.txt

# 11  
Old 06-02-2014
sknovice,
you seem to verify Oracle RAC network interfaces,
so why don't you just use the tool Oracle provides?
Assuming GI is already installed:
Code:
cluvfy comp nodecon -n node1,node3 –i eth0

or
Code:
cluvfy comp nodecon -n all

Where node1, node2, noden are your cluster nodes (all = all cluster nodes).

Check the official documentation for more details.
# 12  
Old 06-02-2014
I just used them as sample only.
one of the host i am using is www.hotmail.com:53 and www.amazon.com:25 etc.

---------- Post updated at 05:18 AM ---------- Previous update was at 05:17 AM ----------

---------- Post updated at 05:22 AM ---------- Previous update was at 05:18 AM ----------

Hello Don,

That's not working as well, it's creating a file named 1 with no data and creating another file testoutput.txt with only succeeded one's not failed one's.

please advice.

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 -zv $hosts 2>1 >> testoutput.txt
        fi
done

Last edited by sknovice; 06-02-2014 at 09:02 AM.. Reason: Sorry , I copied the old source, I am using -zv instead of -z
# 13  
Old 06-02-2014
Compare what you have posted to what Don Cragun proposed. And I do not understand why you refuse to use the -v option.
# 14  
Old 06-02-2014
Hello Rudic,

Sorry, I copied old code accidently, I am using -zv only.
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