To check which nodes Oracle RAC is running, run the command below:

root@linuxrac1:~ # cluvfy stage -post hwos -n all
Performing post-checks for hardware and operating system setup

Checking node reachability…
Node reachability check passed from node “linuxrac1”.

Checking user equivalence…
User equivalence check passed for user “oracle”.

Checking node connectivity…

Node connectivity check passed for subnet “142.40.236.0” with node(s) linuxrac1,linuxrac2.
Node connectivity check passed for subnet “192.168.254.8” with node(s) linuxrac1,linuxrac2.
Node connectivity check passed for subnet “172.22.16.0” with node(s) linuxrac1,linuxrac2.

Suitable interfaces for VIP on subnet “142.40.236.0”:
linuxrac1 vlan1100:142.40.238.172
linuxrac2 vlan1100:142.40.238.173

Suitable interfaces for VIP on subnet “142.40.236.0”:
linuxrac1 vlan1100:142.40.236.175
linuxrac2 vlan1100:142.40.236.177

Suitable interfaces for the private interconnect on subnet “192.168.254.8”:
linuxrac1 vlan1102:192.168.254.9
linuxrac2 vlan1102:192.168.254.10

Suitable interfaces for the private interconnect on subnet “172.22.16.0”:
linuxrac1 vlan1502:172.22.16.218 vlan1502:172.22.16.218
linuxrac2 vlan1502:172.22.16.219 vlan1502:172.22.16.219

Node connectivity check passed.

Checking shared storage accessibility…

WARNING:
Package cvuqdisk not installed.
linuxrac1,linuxrac2

No shared storage found.

Shared storage check was successful on nodes “linuxrac1,linuxrac2”.

Post-check for hardware and operating system setup was successful.