how to use telnet in script


 
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# 8  
Old 04-03-2007
i ve similar one


#!/bin/csh
setenv PASSWD `cat ~/.passwd`
foreach server_name (`cat hostlist`)
echo "connecting to server $server_name"
(sleep 5;echo $USERID;\
sleep 5;echo $PASSWD;\
sleep 2;echo passwd;\
sleep 2;echo $OLDPASSWD;\
sleep 2;echo $NEWPASSWD;\
sleep 2;echo $NEWPASSWD;\
sleep 2;exitSmilie | telnet $server_name | tee -a $server_name.log
end

it is useful in automating of changing password to a number of servers or running the same script on a number of servers. it exits each server after changing the pswd
# 9  
Old 11-08-2008
MySQL It works!

Hi Mady,

I want to thank you for your script post. I was able to use it successfully.
I too did not want to add expect or perl to do the automation task I needed.
This should do just fine for me.

Thanks again.
Well done!

fandi
# 10  
Old 11-09-2008
You cannot reliably automate telnet logins without customizing the telnet source code. The standard workaround is to use expect but this can fail at times. Do a Web search on "automate telnet login" for further information on various workarounds if you want more information.

The best way to overcome this 'limitation' of telnet is to switch to ssh (and scp) which is (1) more secure and (2) can handle automatic logins.
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