I am having a problem in installing MPICH in my Ubuntu OS. I would like to know about the following issues:

1) Are MPICH and MPICH2 are same or different.

2) How can I check if MPICH is installed or not.
Thank You

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D. P. S. L. Kameswari,
Ph. D(Physics)

ACRHEM
University Of Hyderabad,
Hyderabad,
e-mail:phanisri123@gmail.com