Running remote application while I'm not logged in.

Hi,

I use a Linux box (Ubuntu 2.6.15-28-amd64-generic) to remotely run calculations. The thing is, these calculations may last hours or even days, and as soon as I disconnect, the calculations are interrupted. So, the only solutions are: a) run the calculations locally or b) stayed connected all the time (which is almost impossible).

Is there any command I can use to run the calculations remotely without me having to be connected all the time? The idea is connecting, run the program , log off, from time to time connect to see if everything is running and eventually get the results (which are automatically exported to a file).

Thanks,
Pinzao

You can:
1. Run your calculations as a regular cron job, or as an at job (which would allow you to submit it when needed).

2. Use the screen program to disconnect / reconnect ssh sessions.

P.S. You can learn about screen on this forum.

Thanks for the reply, I appreciate it. I will learn more about the screen software soon.

Also, I just heard about a command called 'nohup' that seems to do the trick. Do you know it? Do you think it's better to use the screen program?

Thanks,
Pinzao

I'm familiar with nohup, but haven't used it for exactly what you are describing here. I would use whatever works best for you. ;)