RAC Unix Commands

DCLI

Run a command against all nodes in the cluster

Login as the Oracle user, execute this to list all pmon processes across the cluster:
dcli -l oracle -g /home/oracle/dbs_group ps -ef | grep pmon | grep -v grep
dcli -l oracle -g /opt/oracle.SupportTools/onecommand/dbs_group ps -ef | grep pmon | grep -v grep