Hello,
Iam trying to build a cluster and currently have two machines hooked up. I plan to expand the cluster once i have this working.

Hardware Configuration:
1 pentium 200 MHz machine with 48 MB of RAM
1 pentium 100 MHz machine with 48 MB of RAM

Operating system:
RedHat Linux 6.2

I have made the installations on both the machines to be exactly the same.
I then installed the MPICH-1.2.3 on both machines , as a normal user, in exactly the same directories on both the machines, with exactly the same options to "./configure"

I have modified the " /etc/hosts.equiv " file to include both machines on the network. at present I can " rsh " from one machine to another and can also run the listing from either machine.
I am having trouble in trying to run the "tstmachines" script to test the availability of the machines for multinode processing and i get errors of the kind

unexpected response from 192.168.1.1 :
-> /bin/ls : /home/srik/mpich-1.2.3/sbin/mpichfoo : no such file or directory

the explanation that comes along with this says

the " ls " test failed on some machines. this usually means that you do not have a common file system on all of machines in your machines list; MPICH requires this for mpirun ( it is possible to handle this in a procgroup file; see documentation for more details )

other possible problems include :
the remote shell command does not allow you to run " ls "
see documentation about remote shell and rhosts

you have a common file system, but with inconsistent names
see documentation o the automounter fix


I need help on this. I tried to mail the people at anl, but i havent heard anything from them in 3 days. could someone please help me out on this.

Thanks,
srik.

I have recently starting using linux myself. While I am using a different flavor the idea (i think) would be similar. Did you try setting up 1 as the master (front-end) and the 2nd as the node?? The configurations in the system I have set up are identical on all the nodes (except eth0) but the not the front-end.
I'm using ROCKS.

The test program you are attempting to use interests me. What exactly does it check and how does it work?

What I've done is just to create empty files in the right directory and call it
"mpichfoo" and it works! try it...