Symantec 5 manual Setting up ssh on cluster systems, Accept the default location of ~/.ssh/iddsa

Preparing to install VCS 45

Performing preinstallation tasks

where you run installvcs program. This privilege facilitates to issue ssh or rsh commands on all systems in the cluster. If ssh is used to communicate between systems, it must be configured in a way such that it operates without requests for passwords or passphrases. Similarly, rsh must be configured in such a way to not prompt for passwords.

If system communication is not possible between systems using ssh or rsh, you have recourse.

Warning: The rsh and ssh commands to the remote systems, where VCS is to be installed, must not print any extraneous characters.

Setting up ssh on cluster systems

Use the Secure Shell (ssh) to install VCS on all systems in a cluster from a system outside of the cluster. Before you start the installation process, verify that ssh is configured correctly.

Use Secure Shell (ssh) to do the following:

■Log on to another system over a network

■Execute commands on a remote system

■Copy files from one system to another

The ssh shell provides strong authentication and secure communications over channels. It is intended to replace rlogin, rsh, and rcp.

The Remote Shell (rsh) is disabled by default to provide better security. Use ssh for remote command execution.

Configuring ssh

The procedure to configure ssh uses OpenSSH example file names and commands.

Note: You can configure ssh in other ways. Regardless of how ssh is configured, complete the last step in the example to verify the configuration.

To configure ssh

1Log on to the system from which you want to install VCS.

2Generate a DSA key pair on this system by running the following command:

# ssh-keygen -t dsa

3Accept the default location of ~/.ssh/id_dsa.