<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi,<div>I was able to compile & install MPICH on a master virtual machine for a user cosy11.</div><div>There are identical 2 VM running with IPs 198.125.163.212, 198.125.163.207</div><div><br></div><div>I picked IP=212 as my master node.</div><div>On this node I can run pi computation on two processes:</div><div><br></div><div>cosy11@mpi-be6bebee-55e3-4901-a5bb-637395ba46f6 mpich-3.1]$ mpiexec -n 2 ./examples/cpi<br>Process 1 of 2 is on mpi-be6bebee-55e3-4901-a5bb-637395ba46f6<br>Process 0 of 2 is on mpi-be6bebee-55e3-4901-a5bb-637395ba46f6<br>pi is approximately 3.1415926544231318, Error is 0.0000000008333387<br>wall clock time = 0.000310<br><br></div><div>The next step of instruction (h)</div><div><a href="http://www.mpich.org/static/downloads/3.1/mpich-3.1-README.txt">http://www.mpich.org/static/downloads/3.1/mpich-3.1-README.txt</a></div><div><br></div><div>tells me to define machinefile , below is my definition:</div><div>$ cat machinefile </div><div>198.125.163.207:2<br>198.125.163.212:2<br><br></div><div>Note, I verified I can ssh to both machines from IP=212, but I must type in the password</div><div>$ ssh <a href="mailto:cosy11@198.125.163.212">cosy11@198.125.163.212</a></div><div>$ ssh <a href="mailto:cosy11@198.125.163.207">cosy11@198.125.163.207</a><br><br></div><div>Now, I try to compute pi on both VMs and mpiexec get stuck asking for the password (see the screen shot)</div><div>mpiexec -f machinefile -n 4 ./examples/cpi<br><br></div><div>I must somehow pass credentials for user=cosy11 to both VMs - how?</div><div>Have I missed this step of the instruction?</div><div><br></div><div>Do I need to use ssh-key added to my ssh-add list on IP=212 to make mpiexec to work with remote hosts?</div><div>Is there other solution you prefer?</div><div>Can you help me how to overcome that?</div><div><br></div><div>Thanks</div><div>Jan</div><div><br></div><div><br></div><div><img id="3dbdf985-2f0b-4680-a71c-38fe8105c382" height="267" width="814" apple-width="yes" apple-height="yes" src="cid:201FCA20-17BB-4795-A0B4-5AAF605CEBA6"></div></body></html>