Shell Programming and Scripting

I am running Ubunto 8.10 and I am trying to issue crendtials ( $LOGIN=login & Password) to my telnet command and would like some advice as to what other ways I could write it - currently as shown - doesn't work.. GGrrr

Code:

( echo $LOGIN; sleep 1; echo $LOGIN; sleep 1; echo $UPDATE | telnet $i 24; );

I have to go into my device under port 24 and the $i is the ip address, $UPDATE is my http:software update. I am using this script to update software on remote devices where I don't have root access to add my host to the rhosts file or I would use something else other than telnet. Any ideas appreciated. You guys out there usually have something good and I appreciate your time and advice. Dale

You need to use 'expect' to interact with the 'telnet' utility. You can get help for 'expect' at http:<slash><slash>www.tcl.tk<slash>man<slash>expect5.31<slash>expect.1.html

I can't find it on my system 'whereis expect' comes back with nothing. Will this still help?

you could use something that supports telnet protocol better. eg Perl (Net::Telnet) or Python(telnetlib).

You can download and install expect if your system does not have it installed. Mine is located in /usr/bin/. The other suggestion of using perl will also require the download of the telnet module for perl. If you choose to use expect also download autoexpect it will create the expect script for just like a macro by invoking it and then manualy running through what you want to do. At the end you will have an expect script you can then expand on if needed.