We can leverage SSH public-key authentication between hosts to enable all sorts of useful functionality, including…
- Password-less login from HostA to HostB
- Ability to execute remote commands from HostA on HostB
- We can automatically administer an entire network of servers from a central server
I once set up a very large and complex WebSphere Commerce site for a Fortune 500 retailer that used this procedure to remotely execute various commands, including stopping/starting, and generating reports for, eXtreme Scale caching.