The Common window (shown in the following figure) is the primary window used to send input to all nodes. The Common window is always displayed when you launch the Cluster Console.
This window has a menu bar with three menus and a text field for command entry. From the Hosts menu you can use the Select dialog box to:
Add a host
Add all hosts in a cluster
Remove a host
From the Options menu, you can group or ungroup the Common Window and the terminal windows.