[ninefathom]

Seconded. Naming an interactive language shell after ssh's older, insecure cousin just seems like begging for trouble.

I'm imagining some auditor seeing an "rsh" binary on a Linux system and dinging the system on it, and weeks of back and forth emails and meetings required to determine that, no, in fact, this is not remote shell, it's Ruby shell, and it's actually not a valid audit finding.

And, of course, that's completely omitting the binary collision issue because frankly anybody with "old" rsh installed deserves whatever pain they get.