I am a computer novice, need to use Linux machine processing data, the hope can get help

I now have five hundred mononuclear assignments, and a 20 nuclear machine
I hope I can do it at once submitted to the five hundred mission to the background and then keep at the same time calculation of homework only 20 (nuclear) make full use of and no more than
Additional follow-up I need variable frequency variable number of supplementary task I hope to intelligent management of the work (and to make full use of the machine)
I don't know how to do it, the hope can get help, or keywords and web links