Use the Secure Shell (
ssh) to install VCS on all systems in a cluster from a system outside of the cluster. Verify that
ssh is configured correctly before starting the installation process.
Secure Shell (
ssh) is a program to log on to another computer over a network, to execute commands on a remote system, and to copy files from one system to another. The
ssh provides strong authentication and secure communications over channels. It is intended to replace
The procedure to configure
ssh uses OpenSSH example file names and commands.
To configure ssh
ssh-keygen -t dsa
chmod 755 ~/.ssh
If the local system is part of the cluster, make sure to edit the authorized_keys file on that system.
exec /usr/bin/ssh-agent $SHELL
This step is shell-specific and is valid for the duration the shell is alive.
You are ready to install VCS on several systems by running the installvcs program on any one of them or on an independent system outside the cluster.
ssh -x -l root north ls
ssh -x -l root south ifconfig
The commands should execute on the remote system without having to enter a passphrase or password.
You can configure
ssh in other ways. Regardless of how
ssh is configured, complete the last step in the example above to verify the configuration.