Shutdown in RAC

If I use sqlplus in RAC environment and issue the command

shutdown immediate;

Does this shutdown the instance or all of them?

How does one prove the whole edifice is shutdown?

shutdown immediate shuts down the current instance.

To shut down all RAC instances, issue the above shutdown command in all instances, or better use srvctl, for example:

srvctl stop database -d orcl

StackExchange Database Administrators Q#148753, answer score: 5