<i>lol</i> Running Linux/390 or z/Linux under Hercules just slows the thing down, without offering any mainframe benefits.<p>Not even educational benefits, as you can not license z/VM, VM/ESA, z/OS or OS/390 to Hercules to run a Linux in the same environment as it would on a real iron.
I really wish IBM would open up some sort of emulation environment for educational use. Their customers desperately need new z/OS developers but it's hard to break into that space and learn it.