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SSH one user multil public key

Using SSH, log in to the node where you copied the authorized_keys file. Then change to the .ssh directory, and using the cat command, add the DSA keys for the second node to the authorized_keys file, clicking Enter when you are prompted for a password, so that passwordless SSH is set up

[grid@bao .ssh]$ ssh bao [grid@bao grid]
$ cd .ssh [grid@bao ssh]
$ cat  >> authorized_keys