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Generate a key pair with ssh-keygen.
kenneth@tg-login2:/users/kenneth/info/mcp/test/mcpdata> ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/users/kenneth/.ssh/id_rsa): rsamcp
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in rsamcp.
Your public key has been saved in rsamcp.pub.
The key fingerprint is:
d9:2f:7b:0e:9b:f6:e8:63:56:1d:28:ec:21:fc:c3:3c kenneth@tg-login2
kenneth@tg-login2:/users/kenneth/info/mcp/test/mcpdata> ls rsa*
rsamcp rsamcp.pub
kenneth@tg-login2:/users/kenneth/info/mcp/test/mcpdata>
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Create ~/.ssh/authorized_keys file on each cluster. Put the contents of the public key file into authorized_keys.
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Run ssh-agent and ssh-add to set up an agent with the key.
kenneth@tg-login2:~/info/mcp/test/mcpdata> ssh-agent /bin/bash
kenneth@tg-login2:~/info/mcp/test/mcpdata> ssh-add rsamcp
Enter passphrase for rsamcp:
Identity added: rsamcp (rsamcp)
kenneth@tg-login2:~/info/mcp/test/mcpdata>
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Enjoy passwordless access.
kenneth@tg-login2:~/info/mcp/test/mcpdata> ssh login-abe.ncsa.teragrid.org /bin/hostname
honest1.ncsa.uiuc.edu
kenneth@tg-login2:~/info/mcp/test/mcpdata>