The old eskimo.com shell server has been restored to service.  It wasn’t completely crashed.  SunOS 4.x has a strange bug in it where it can get in a state where the kernel is still running, the machine will still respond to pings, but any user space programs don’t get CPU time.  This seems to depend upon the CPU module, the previous module never did this but it cooked, this one does, and I’ve no longer got any spare parts to replace it with.