[Help] Has someone used MPI to build a linux parallel computing platform?

[Help] Has someone used MPI to build a linux parallel computing platform? -- Linux general technology-Linux programming and kernel information. The following is a detailed description. For example, I have two machines now, machine A is suse10.3, machine B is centos5.0, And the mpich-1.2.7 is installed on both machines, add the IP addresses and computer names of all machines to the/etc/hosts files of the two machines, and add them to the/etc/hosts file. the names of all machines are added to equiv and are still in machines. in LINUX, the names of all machines are added, and the same account and password are set up on machines A and B. The application is also placed under the same path of the same account, and then run the command: mpirun-np 4 Application name to start the program. But it still cannot run successfully, as if it could not connect to a remote machine. Has anyone built the mpi platform on the version? Please do not give me any further advice.