BASH + Telnet

[Greg]

I want to write a bash script that will telnet into my modem and perform a set of commands, but I'm not really sure where to start in writing this script. Is this even possible? Any help is appreciated.

Thanks,
~Greg

 

[The General]

Hmm... I know you could write a script to telnet into your modem. And I know you could write a script that would execute a set of commands.

I just don't know if it would work to have them in one.

horndude would know, I think.

[/end useless post]

 

[Greg]

Just to clarify, when I say "telnet into my modem and perform a set of commands" I mean the commands would be performed on the modem through telnet. I don't really need to have any commands executed on my computer.

I'm glad to see you're still around here, and thanks for the response.

~Greg

 

[Greg]

Ah, yes! I got it. I found this website which had an example that I based mine off of.

I always hate those web activity logs for some reason, even though I know nobody else can see them The purpose of this script is remove the log from my modem and replace it with a link to /dev/null so it can't be regenerated.


I start this script:

#!/bin/bash
echo -n "Password: "
./telnet-commands | telnet

which executes this script:

#!/bin/bash

stty_orig=`stty -g`
stty -echo
read pass
stty $stty_orig

echo "open 192.168.100.1 23"
sleep 1
echo "admin"
sleep 1
echo ${pass}
sleep 1
echo "cd /var/tmp"
sleep 1
echo "rm log_web_activity"
sleep 1
echo "ln -s /dev/null log_web_activity"
sleep 1
echo "exit"

and pipes it into telnet.

I'm happy, no more doing it by hand

 

[Enterpriser]

OMG Thanks I was looking for something similar. Thank you once again.

 

[Greg]

Glad to see it helped someone, I love futzing around with Bash scripts

I'm still pretty bad at writing them, but it's always fun.

 

[The General]

^ OMG there's someone else in Bakersfield who uses Linux and likes Star Trek. Are you sure you aren't me? lol

 

[void]

You do realise that telnet doesn't encrypt. For remote login, use SSH, its more secure.

If you used SSH you could write

ssh username@ipaddress ./telnet_commands.sh

to excute a command or shell script on the remote computer. With the script being

#!/bin/bash
cd /var/tmp
rm log_web_activity
ln -s /dev/null log_web_activity

A good tutorial for SSH is here

 

[simple]

the ssh tutorial is really nice. thanks for that. c ya!!

 

[Enterpriser]

^ OMG there's someone else in Bakersfield who uses Linux and likes Star Trek. Are you sure you aren't me? lol

You are not alone brother.