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cluster:93 [2011/01/11 15:50]
hmeij 		cluster:93 [2011/01/11 16:38]
hmeij
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 ===== SSH Keys ===== ===== SSH Keys =====
  
-Within the directory **/home/username/.ssh** there is a file named **known_hosts**.  Within this file are host level public SSH keys.  Because your home directory contents are copied over to host greentail, you should be able to ssh from host petaltail or swallowtail to host greentail without a password prompt.  If not, your keys are not set up properly.+You can log in to host greentail directly (''ssh username@greentail.wesleyan.edu''). VPN required for off campus access.
  
-You can also log in to host greentail directly (''ssh username@greentail.wesleyan.edu'').  From host greentail should be able to to ssh to host petaltail or swallowtail without a password prompt. If not, your keys are not set up properly.+Within the directory **/home/username/.ssh** there is a file named **authorized_keys**.  Within this file are public SSH keys.  Because your home directory contents are copied over to host greentail, you should be able to ssh from host petaltail or swallowtail to host greentail without a password prompt.  If not, your keys are not set up properly.  You may need to add your ''id_rsa.pub'' content to this file.
  
- +Note: the software stack on host petaltail (administrative server) creates ssh keys for you automatically upon your first login, so for most of you this is all set.  To set up your private/public ssh keys manually:
-Note: the software stack on host petaltail/swallowtail created ssh keys for you automatically upon your first login, so for most of you this is all set.  To set up your private/public ssh keys:+
  
   * log into a host, then issue the command ''ssh-keygen -t rsa''   * log into a host, then issue the command ''ssh-keygen -t rsa''
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   * then copy the contents of /home/username/.ssh/id_rsa.pub into the file authorized_keys   * then copy the contents of /home/username/.ssh/id_rsa.pub into the file authorized_keys
   * you can have multiple public ssh key entries in this file   * you can have multiple public ssh key entries in this file
 +
 +The file **known_hosts** contains server level ssh keys.  This is necessary for MPI programs to log into compute nodes without a password prompt and submit your jobs.  That file has been prepped for you.
 +
  
  
cluster/93.txt · Last modified: 2011/01/11 20:55 by hmeij

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