Question: I xould like to execute a shell script on an Ubuntu Machine throught Putty.

The problem is that, if i execute the script with putty connected to the session that run on the machine (same username) it's executed "inside" the putty session, if I close the putty windows, the program stop executing (tracd in this case)

I would like to start tracd on the session that is open on the host machine, ion order for the programm to continue to run when I stop my putty session....

Thanks for your answers!

Answer: 
You can achieve this behaviour with the [nohup](http://en.wikipedia.org/wiki/Nohup) command.
One way that would work (no idea if a better option exists or not) is to set a Cron job to run at a specific time (say two minutes from now). After it's started, you can remove the Cron job again and close Putty. You can specify which user should be running the Cron job, which solves the problem you have here.