Hi,
One of prerequisites for establishing a hadoop cluster is two create passwordless sessions between nodes.
I am aware of how to generate pass-wordless session between node1 and node2 by creating
#ssh-keygen
and then coping the contents to destination like below
#cat .ssh/id_rsa.pub | ssh root@192.168.192.18 'cat >>
.ssh/authorized_keys'
my question is that shoul I do this between each 2 nodes once or two times.
for example once from node1 to node2 and then again from node2 to node1?
Thanks.