> -----Original Message----- > From: fedora-list-bounces@xxxxxxxxxx > [mailto:fedora-list-bounces@xxxxxxxxxx] On Behalf Of Stephen Mirowski > Sent: Friday, May 19, 2006 12:12 PM > To: For users of Fedora Core releases > Subject: Re: setting a password less ssh connection > > hicham wrote: > > Hello > > I'm having trouble to set a passwordless ssh connection > between many > > pcs , SNIP.... Here is how we do it for clusters using MPI/MPICH: This is part of a new application note that we are about to bring on-line with our new web site. This has not been edited. Therefore read it through and then use the parts that you need. ---------------------------------------------------------------------- --------------------------------------------------------------- STEP 3: Configure SSH to connect without a password ---------------------------------------------------------------------- --------------------------------------------------------------- The mpd ring of MPICH2 runs by connecting to each machine via ssh. It is required that each machine can connect to each other machine using ssh without a password. In our experience, each machine must also be able to connect to itself using ssh without a password. The following steps are required. 1. > ssh-keygen -t rsa When asked for a passphrase, leave it blank, press enter to continue. This will create 2 files in your $(HOME)/.ssh directory: id_rsa and id_rsa.pub. They are the public and private rsa keys. 2. Rename the newly created id_rsa.pub to authorized_keys in the $(HOME)/.ssh directory. You should now be able to ssh into the local machine without having to provide a password. Run the above two commands on each machine in the cluster. Copy the contents (not the actual file) of the id_rsa.pub file to the authorized_keys file on the master (or first machine) you ran these commands on. You should now have an authorized_keys file that contains the key from each machine. Copy this file to $(HOME)/.ssh to each node in the cluster. Every node should now be able to ssh into every other node (including itself) without prompting for a password. -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.6.1/344 - Release Date: 5/19/2006
