help: lingon terminal command at startup python string

In order to connect the iphone via ssh over usb on the mac, it is necessary to run a terminal command. Can anyone please help me figure out how to have a simple command string run in the terminal every time I startup, and have the terminal window close automatically when it is done? I have lingon, which should make it easy, but I still need help. I created a "user agent", but it doesn't seem to be doing the trick and there are no error messages. Here is the string I need to run from terminal every time the computer starts up (and then close the terminal after the string is run):

python /Applications/python-client/tcprelay.py -t 22:2222 &

Or get to the directory /Applications/python-client, and then run

python tcprelay.py -t 22:2222 &

Thanks.

I wrote a simple shell script with 755 permissions and used lingon to execute the shell script with a user agent -- command string "sh [absolute path to shell script]".

#!/bin/bash

# iphone usb ssh script

/Applications/python-client/tcprelay.py -t 22:2222 &

However, I was unable to figure out how to force the full command string to execute without a shell script just by running a user agent at logon -- the farthest I got was executing tcprelay.py without the arguments, and am not sure why the arguments are not recognized -- looking in /var/log/system.log revealed that tcprelay.py was being executed without arguments despite the user agent seemingly containing the correct arguments.

Thank you -- I just tried your method and that is indeed a viable alternative. After contacting the Lingon developer a few weeks back, who told me that he also uses shell scripts for more complicated jobs, I chose to use "Platypus-4.4" to create an app with a built-in shell script, and I used the OSX login system preferences to select the app I created -- the script was just two lines:

#!/bin/sh

/usr/bin/python2.6 /Applications/python-client/tcprelay.py -t 22:2222 &

The reason for this project is that I have a jailbroken iPhone with iOS 4.1, and I synchronize my 10GB master database by transferring files to / from the iOS device using a usb connection to the Mac, instead of wireless. The result is that I can transfer multiple files and/or very large files at maximum data transfer speeds. With this setup, I just hook up the iPhone to the Mac with the usb cable and it is ready for usb data transfer using ForkLift2. I did this on the desktop, and on the two laptops.

https://github.com/gilir/usbmuxd-debian/tree/debian/python-client/