shell script telnet multiple nodes and apply different command

phpshell · 11-12-2012, 01:47 AM

actually I am new with shell script i want to make script telnet multiple nodes and apply different command

for example

site A IP 10.0.0.1 command on site B is
“configure xdsl line 1/1/10/27 service-profile 15”

site B IP 10.0.0.2 command on site B is
“configure xdsl line 1/1/11/11 service-profile 16”

i think i need to have two file contain Hosts IPs and another file for command need to apply

i try to use this code and it was nice if you have only one command need to apply

Code:

#!/bin/bash
while read line
do
# -c 1 means ping only once
# -w means time-out, so if nothing is received within 5 seconds then it's a fail
if ! ping -c 1 -w 5 $line &>/dev/null ;
then
echo "Failed to connect to $line"
else
echo "Connected to $line!"
username=admin
passwd=admin
port=23
cmd1="ter le 0"
cmd2="sh run"
cmd3="sh ru int di0"
( echo open ${line} ${port}
sleep 2
echo ${username}
sleep 2
echo ${passwd}
sleep 2
echo ${cmd1}
sleep 3
echo ${cmd2}
sleep 3
echo ${cmd3}
sleep 3
echo exit ) | telnet
fi
done < ip.txt

anyone can help me to editable above script to do my requirement

catkin · 11-12-2012, 02:20 AM

The script posted does not seem to use the command shown in the example ... ?

Here's a modified version of the script. Loop-invariant variable assignments have been moved before the loop and the code indented. The my.conf file has both the IP address and the command ...

Code:

10.0.0.1 configure xdsl line 1/1/10/27 service-profile 15
10.0.0.2 configure xdsl line 1/1/11/11 service-profile 16

... which the script reads as $ip and $command but $command is not used:

Code:

#!/bin/bash
username=admin
passwd=admin
port=23
cmd1="ter le 0"
cmd2="sh run"
cmd3="sh ru int di0"
while read ip command
do
    # -c 1 means ping only once
    # -w means time-out, so if nothing is received within 5 seconds then it's a fail
    if ! ping -c 1 -w 5 $ip &>/dev/null ;
    then
        echo "Failed to connect to $ip" >&2
    else
        echo "Connected to $ip!"
        ( echo open ${ip} ${port}
            sleep 2
            echo ${username}
            sleep 2
            echo ${passwd}
            sleep 2
            echo ${cmd1}
            sleep 3
            echo ${cmd2}
            sleep 3
            echo ${cmd3}
            sleep 3
            echo exit ) | telnet
    fi
done < my.conf

Incidentally there is no need for the {} around variable names unless the following character could be part of a variable name.

EDIT: and the error message has been redirected to stderr instead of stout as is conventional.

Tobler · 11-12-2012, 03:34 AM

Hi
I have been doing same some years ago. There I was using expect -command and with autoexpect I was create script which recorded my example session.

$ expect -f testhost telnet testhost1
That would start telnet session to testhost1. And expect script is written to file testhost.

So then type all you should run on remote end. And finally quit your telnet session. That would save your script and you can start modifying it. Just replace host names, possible passwords and you may clean it more. And then integrate it with your shell script.
There was way to get shell environment variables as a host name and password but I don't remember that right now.

There's more documentation with just one search word: autoexpect

Br, Tobler

phpshell · 11-12-2012, 05:54 AM

Dear catkin

Code:

#!/bin/bash
username=admin
passwd=admin
port=23
cmd1="ter le 0"
cmd2="sh run"
cmd3="sh ru int di0"
while read ip command
do
    # -c 1 means ping only once
    # -w means time-out, so if nothing is received within 5 seconds then it's a fail
    if ! ping -c 1 -w 5 $ip &>/dev/null ;
    then
        echo "Failed to connect to $ip" >&2
    else
        echo "Connected to $ip!"
        ( echo open ${ip} ${port}
            sleep 2
            echo ${username}
            sleep 2
            echo ${passwd}
            sleep 2
            echo ${cmd1}
            sleep 3
            echo ${cmd2}
            sleep 3
            echo ${cmd3}
            sleep 3
            echo exit ) | telnet
    fi
done < my.conf

i tried this above script it still given me my old commands sequence
cmd1="ter le 0"
cmd2="sh run"
cmd3="sh ru int di0"

which it dose not in my.conf

my.conf is
10.0.0.1 configure xdsl line 1/1/10/27 service-profile 15

your help is highly appreciated

dear Tobler
if you have your old script by except please send it to me
many thanks for your support

catkin · 11-12-2012, 06:47 AM

That's right -- you have not yet explained what sequence of commands you want to pipe to telnet. Do you want to send the open, username and password commands as before and then the command from my.conf? If so, try to code it and post what you write. If it doesn't work for you, explain how it doesn't work.

phpshell · 11-12-2012, 07:07 AM

Dear catkin

exactly

I want to send the open, username and password commands as before and then the command from my.conf

is it possible to modify the script to do it like this

my script now is

Code:

#!/bin/bash
username=admin
passwd=admin
port=23
while read ip command
do
    # -c 1 means ping only once
    # -w means time-out, so if nothing is received within 5 seconds then it's a fail
    if ! ping -c 1 -w 5 $ip &>/dev/null ;
    then
        echo "Failed to connect to $ip" >&2
    else
        echo "Connected to $ip!"
        ( echo open ${ip} ${port}
            sleep 2
            echo ${username}
            sleep 2
            echo ${passwd}
            sleep 3
            echo exit ) | telnet
    fi
done < my.conf

and the result is

Code:

Username: admin
Password: 

alhokama#Connection closed by foreign host.
[root@proxy newtelnet]#

my.conf file

Code:

10.0.0.1 configure xdsl line 1/1/10/27 service-profile 15

still above command remaining which on red color and need to apply before exit the session

thanks again

catkin · 11-12-2012, 07:23 AM

Getting there but t doesn't send $command., it just logs in and exits. You can use the same technique that the original script used to send $cmd1.

phpshell · 11-12-2012, 09:45 AM

Seeking your support to modify it to be send $command

catkin · 11-12-2012, 07:50 PM

Seeking your initiative to follow the pattern in the script and do it yourself.

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