Q-Logic IB6054601-00 D Switch User Manual


 
3 – Using InfiniPath MPI
InfiniPath MPI Details
3-6 IB6054601-00 D
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The process is shown in the following steps:
1. Create a key pair. Use the default file name, and be sure to enter a passphrase.
$ ssh-keygen -t rsa
2. Enter a passphrase for your key pair when prompted. Note that the key agent
does not survive X11 logout or system reboot:
$ ssh-add
3. This tells ssh that your key pair should let you in:
$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
edit ~/.ssh/config so that it reads like this:
Host*
ForwardAgent yes
ForwardX11 yes
CheckHostIP no
StrictHostKeyChecking no
This forwards the key agent requests back to your desktop. When you log into
a front end node, you can ssh to compute nodes without passwords.
4. Start ssh-agent by adding the following line to your ~/.bash_profile (or
equivalent in another shell):
eval ‘ssh-agent‘
Use back-quotes rather than normal single-quotes. Programs started in your
login shell will then be able to locate
ssh-agent and query it for keys.
5. Finally, test by logging into the front end node, and from the front end node to
a compute node as follows:
$ ssh frontend_node_name
$ ssh compute_node_name
For more information, see the man pages for ssh(1),ssh-keygen(1),
ssh-add(1), and ssh-agent(1).
Alternatively, the cluster administrator can accomplish this for all users through the
shosts.equiv mechanism, as described in section 2.9.