If cron is installed (I didn't check and I don't have an Intel Galileo at hand) then I think it's possible, since it's Linux. However...
a) A sketch is an always-running process (setup-loop functions)... then you should manage kill and restart... killing is as simple as that, and there are several threads on running sketches, just like I dont want to upload arduino sketches, i want to open the sketch file directory and run it from ssh.
b) Did you think about using a plain delay for doing any task periodically? or maybe I'm missing something.
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It would be necessary to check if the Cron package is already installed in the Galileo eglibc image. I’m sure it is not installed by default in the uClibc image, but you can get it from the AlexT repository (Cronie), you can check it here: http://repo.opkg.net/galileo/i586/. If you’re not sure how to download packages from his repository you can check his instructions here http://alextgalileo.altervista.org/package-repo-configuration-instructions.html.
I was also looking for another way to install it and found this https://github.com/sarweshkumar47/Packages-Install-on-Intel-Galileo-Poky-os/tree/master/cron_service_install. You’ll just need to run the cron_install_galileo.sh script and it will download and install Cronie for you.
There you have two options to get Cron running on your board, I would also suggest you to check this thread https://intel-openport-v8.hosted.jivesoftware.com/thread/60751.
As FGT mentioned in his comment, a sketch is an always running process, so take into account his instructions on using kill and restart.
Thank you all for your fast answers. I apologize for the delay in returning. Part of that delay is a change from Windows 7 to Debian and the expected and unexpected....
Fernando, the link you provided looked promising and once the dust settles I'll be back at this more regularly. Pablo, your links made me more aware of the OS choices. There was one that I wanted to follow up on, but just now, I'm without my notes. I know that it was part of an Intel project and that it was said to host a good development environment.
Again, Thanks all. And, again, I apologize for the delay. I wish that I could say when I'd back on this....