I think termux is the most exciting "app" I have seen yet for a "smartphone". Is there anything similar for iPhone. I finally have a server with a monitor that fits in the palm of my hand running a C compiler. Enough storage space to store all the zone files for the entire www. This is more like the future I envisioned than what Apple has been working on.

Note the word "like". The future I envision has palmtop servers with monitors that boot UNIX-like OS written by computer enthusiast volunteers, not staff at a trillion dollar advertising company. Virtual machines, subsystems, Cygwin/MSYS, or whatever, are no substitute for the real thing.

We are getting there, slowly.