[mpich-discuss] Issue running mpirun on my quad core with ubuntu

[Zachary Lubin]

Help,
I am using Ubuntu 64-bit with a quad core intel chip.
I am trying to use mpich on the four cores to run a program.
I am getting errors, something about refused connections and i don't
understand what to do.
I am a beginner with linux.

$ mpirun -np 4 my_exe
localhost: Connection refused
p0_9833:  p4_error: Child process exited while making connection to
remote process on localhost: 0
p0_9833: (37.003906) net_send: could not write to fd=4, errno = 32