oracle RAC diagnostics command

use the below commands to gather information on RAC for troubleshooting

From the grid user account do the following:

1)check the whole CRS installation as it is now:
cluvfy stage -post crsinst -n all -verbose

2) check the whole RAC db install as it is now
cluvfy stage -pre dbinst -n all -verbose

3) compare nodes
cluvfy comp peer -n all -verbose

4) check crs nodes integrity
cluvfy comp crs -n all -verbose

5) check if nodes have been removed previously registered in crs
cluvfy stage -post nodedel

6) validate installation deviations to best practices and mandatory reqs for crs/db
cluvfy comp healthcheck -deviations