CentOS--Cluster ssh password-free login (single point to multiple points)

Reprint please indicate the source: http://blog.csdn.net/l1028386804/article/details/79399463

Assuming that the source host requires a target node with host name Node1, Node2, and node3 to access without password under User name test, you need to enter the following command one at a time:

Ssh-keygen
ssh-copy-id test@node1
ssh-copy-id test@node2 ssh-copy-id test@node3

or
Ssh-keygen -t RSA
Ssh-copy-id test@node1
ssh-copy-id test@node2
ssh-copy-id test@node3

or
ssh-keygen-t DSA
ssh-copy-id test@node1
ssh-copy-id test@node2
Ssh-copy-id test@node3