
166 Q. Huang, J. Xia, M. Yu, K. Benedict, and M. Bambacus
and add the IP of the computing node to the host list. Then cre-
ate a public key at the head node. Finally, use SSH to access each
computing node, and copy the head node’s public key to the
authorized keylist.
[r oot@domU-headMnt ~] vi /etc/hosts #access to the
hosts list of the head node
[r oot@domU-headMnt ~] ssh-keygen -t rsa #create a
public key at the head node
[root@domU-computing~] mkdir –p /root/.ssh/
[r oot@domU-computing ~] scp root@domU-head: /root/.
ssh/id_ras.pub /root/.ssh/ #copy the public key
from the head node to the computing node
[r oot@domU-computing ...