Shell Programming and Scripting

Hiya,

I'm trying to write a shell script to enter a bunch of loooooong configuration commands (to set ip, gateway etc.) for a quite outdated modem. It must be accessed via telnet. Here the preliminary code:

Code:

#!/bin/bash          
(echo "open 192.168.1.254"; sleep 10 
echo "Administrator"; sleep 3 
echo "modem command 1"; sleep 2
echo "modem command 2"; sleep 2
 ) | telnet

After the "open" command, I am asked a user name which is "Administrator", upon which I enter the modem terminal and have to put some 20 large commands ("modem command x") followed by ENTER. I can get as far as the modem terminal, but then the script just put the sequence of commands without ENTER:

Code:

Username : Administrator
 {Administrator}=>modem command 1  modem command 2   modem command 3

A solution to a similar problem in this forum suggests to put "\r" in the script to simulate the ENTER key but in my case this would just add a plain "r" to the command line.

I would also be happy about a solution which allows to press the ENTER key manually during sleep time (if I do this now, it would just make a new line...)

I'm a scripting noob and also not too knowledgable about telnet so please bear with me thx in advance for any hint!

PS. I read about the EXPECT package but it's no option since a want to have a code that runs on various machines without prerequisites.

Try printf "open 192.168.1.254\r\n" ; sleep 10 and the like.