Setting Up SSH on UNIX and Linux Systems

Setting up SSH on UNIX and Linux systems involves verifying that the SSH server daemon sshd is running and, if necessary, starting this daemon. Set up SSH on the DAS host and on all hosts where instances in your cluster will reside.

On UNIX and Linux systems, SSH software is typically installed as part of the base operating system. If SSH is not installed, download and install the appropriate OpenSSH SSH package for your operating system.

How to set up SSH on UNIX and Linux systems depends on the flavor of the operating system that you are running, as explained in the following sections:

• To Set Up SSH on Oracle Solaris Systems

• To Set Up SSH on MacOS Systems

• To Set Up SSH on Linux systems

To Set Up SSH on Oracle Solaris Systems

1. Ensure that the following options in the configuration file /etc/ssh/sshd_config are set to yes:

   • StrictModes

   • PubkeyAuthentication

2. Determine if the SSH server daemon sshd is running.

   $ /usr/bin/svcs ssh

3. If the SSH server daemon sshd is not running, start this daemon.

   If the daemon is running, no further action is required.

   $ /usr/sbin/svcadm enable ssh

Example 2-2 Determining if the sshd Daemon Is Running on an Oracle Solaris System

This example confirms that the SSH server daemon sshd is running on an Oracle Solaris system.

$ /usr/bin/svcs ssh
STATE          STIME    FMRI
online         Jul_06   svc:/network/ssh:default

See Also

svcs(1)

Next Steps

After you have completed the setup of SSH on a host, test the setup on the host as explained in Testing the SSH Setup on a Host.

To Set Up SSH on MacOS Systems

1. Open System Preferences and click Sharing.

   The Sharing window opens.

2. Ensure that Remote Login is selected in the Service list.
3. Ensure that either of the following is allowed access:

   • All Users

   • The user that running the DAS or instance

Next Steps

After you have completed the setup of SSH on a host, test the setup on the host as explained in Testing the SSH Setup on a Host.

To Set Up SSH on Linux systems

1. Ensure that the following options in the configuration file /etc/ssh/sshd_config are set to yes:

   • StrictModes

   • PubkeyAuthentication

2. Determine if the SSH server daemon sshd is running.

   $ /sbin/service sshd status

3. If the SSH server daemon sshd is not running, start this daemon.

   If the daemon is running, no further action is required.

   $ /sbin/service sshd start

Example 2-3 Determining if the sshd Daemon Is Running on a Linux System

This example confirms that the SSH server daemon sshd is running on a Linux system.

$ /sbin/service sshd status
openssh-daemon (pid  2373) is running...

Next Steps

After you have completed the setup of SSH on a host, test the setup on the host as explained in Testing the SSH Setup on a Host.