The SSH program lets you log into and execute commands on a remote system. SSH enables encrypted communications and an authentication process between two untrusted hosts over an insecure network. SSH is the preferred method of remote communication because it provides a greater level of security than the RSH suite of protocols. Veritas recommends configuring a secure shell environment before installing any Veritas product. The following is an example SSH setup procedure.
Note Read the SSH documentation and online manual pages before enabling SSH. Visit the OpenSSH website for more information. Contact your OS support provider for issues regarding SSH configuration.
System output similar to the following is displayed:
Generating public/private dsa key pair.
Enter file in which to save the key (/root/.ssh/id_dsa):
/.ssh/id_dsa
. System output similar to the following is displayed:
Enter passphrase (empty for no passphrase):
/root/.ssh/id_dsa.pub
to /root/.ssh/authorized_keys
on the each target system by invoking the secure file transfer program:
If you are performing this step for the first time on this system, output similar to the following is displayed:
The authenticity of host 'target_sys (10.182.00.00)'
can't be established. DSA key fingerprint is
fb:6f:9f:61:91:9d:44:6b:87:86:ef:68:a6:fd:88:7d.
Are you sure you want to continue connecting (yes/no)?
Warning: Permanently added 'target_sys,10.182.00.00'
(DSA) to the list of known hosts.
sftp> put /root/.ssh/id_dsa.pub \
The following output is displayed:
Uploading /.ssh/id_dsa.pub to /id_dsa.pub
id_dsa.pub
key to the local /root/.ssh/authorized_keys
file. The installation can fail if the installation source system is not authenticated.
root
:
#
exec /usr/bin/ssh-agent $SHELL
Identity added: /root/.ssh/id_dsa
This is a shell-specific step and is valid only while the shell is active. You must execute the procedure again if you close the shell during the session.
#
ssh -l root
target_sys
uname -a
The commands should execute on the remote system without the system requesting a passphrase or password.