We are attempting to speed up the installation of oracle nodes for RAC installation.this requires that we get ssh installed and configured so that it doesn't prompt for a password.The problem is:On first usage, we are prompted forRSA key fingerprint is 96:a9:23:5c:cc:d1:0a:d4:70:22:93:e9:9e:1e:74:2f.Are you sure you want to continue connecting (yes/no)? yesIs there a way to avoid that or are we doomed to connect at least once on every server from every server manually?
how to avoid ssh asking permission?
ssh;key authentication
Set StrictHostKeyChecking no in your /etc/ssh/ssh_config file, where it will be a global option used by every user on the server.  Or set it in your ~/.ssh/config file, where it will be the default for only the current user.  Or you can use it on the command line:ssh -o StrictHostKeyChecking=no -l $user $hostHere's an explanation of how this works from man ssh_config: StrictHostKeyChecking         If this flag is set to yes, ssh will never automatically add         host keys to the $HOME/.ssh/known_hosts file, and refuses to         connect to hosts whose host key has changed.  This provides max-         imum protection against trojan horse attacks, however, can be         annoying when the /etc/ssh/ssh_known_hosts file is poorly main-         tained, or connections to new hosts are frequently made.  This         option forces the user to manually add all new hosts.  If this         flag is set to no, ssh will automatically add new host keys to         the user known hosts files.  If this flag is set to ask, new         host keys will be added to the user known host files only after         the user has confirmed that is what they really want to do, and         ssh will refuse to connect to hosts whose host key has changed.         The host keys of known hosts will be verified automatically in         all cases.  The argument must be yes, no or ask.  The         default is ask.