Would be great to have a localhost terminal to be able to ping and do other stuffs.
While this idea is both great and achievable, it wouldn't be acceptable to put it on the App Store. Apple insists that all App Store apps are heavily sandboxed, and a localhost tty would violate this policy. However, this may see the light of day on a jailbroken or profiled device.
Yes! I use this on the Mac version by having a server host just localhost but that didn't work on iOS