Shell Programming and Scripting

Hi , Two things which i wanted clarify

The reason behind the implementation is that we have multiple connections to various nodes through which files move in and out. so we are monitoring the ip also we are trying to implement the telnet functionality in this.

I have sorted out the ping command functionality by using grep option whihc would get the particular pattern and then decide accordingly.

Now the next step which i would be following is telnet.

so here i telnet to the ip with the port no

say for example

telnet 112.123.123.121 xxxx where xxxx is the port no
now here after this command is fired the telnet is connected and while logging out i type logout there and comeout. This is in case of a manual connection.

Now if i am implementing this int he script

telnet 112.123.123.121 xxxx > file1

`sleep 15`

'logout`

cat file1 | grep " connected"

if [ $? -eq 0 ]

then

echo " the node is up " | mailx -s " node connecitivty " venkidhadha@in.com

The problem which happens here is that after loggin in the logout command doesnot work as now we are not in the original system where the scirpt is present.

How can do a remote logout of telnet so that the next step "LOGOUT" works?


Sorry if this seems to be a basic question.

Thanks a lot actually i have sorted that issue out. i am using a grep option and from that i am retreiving the data. Also now i need to know how do i remotely logg off my telnet seession with a vendor node from my system. I am not bale to use this in my script because the logout command in my scirpt will not work after connecting the the vendor node and oly after i log out manually the logout and the next commands in,my script works. Hope you got my point. sorry if it is too basic for you.

Assuming you only want the first 7 IP's from this file, try this also:

Code:

ips=`head -n 7 iplist`
for myip in $ips
do
     ping -c 1 $myip
     if [$? -eq 0]
     then 
         echo " The node $myip is alive " |  mailx -s " Network connectivity " venki_dadad @in.com 
     else 
         echo " The node $myip is down  " | mailx -s " Network connectivity " venki_dadad @in.com 
      fi
done

Or you could batch this in one shot like this:

Code:

ips=`head -n 7 iplist`
RESULT=""
for myip in $ips
do
     # Make this post to the console (remove the '2>&1 >> /dev/null' at the end)  or leave it so that it is quiet
     ping -c 1 $myip 2>&1 >> /dev/null
     if [$? -eq 0]
     then 
         RESULT="${RESULT} \nThe node $myip is alive "  
     else 
         RESULT="${RESULT} \nThe node $myip is down  " 
      fi
done
echo -e "${RESULT}" |  mailx -s " Network connectivity " venki_dadad @in.com

One email sent with all test results.

Ok, for this I think You should have a look at the program expect. It will enable You to script and automate any console/text based connection by logging in, looking for expected output and sending a predefined response.

/Lakris

That was why I posted AFTER you said you sorted it all out...

Why use the un-needed grep?

Look at my previous post and you will see that grep is not needed.

Code:

ips=`head -n 7 iplist`

No grep used to get these ip's.