Saturday, 7 November 2015 failure while running Oracle clusterware installation

If the fails on a node and you try to re execute it after fixing the failure then it gives the following error:

CRS is already configured on this node for crshome=0 Cannot configure two CRS instances on the same cluster.Please deconfigure before proceeding with the configuration of new home.

In order to perform a cleanup you will need to execute the following two commands as the root user.
In all the nodes where the failed execute the following:
# perl $GRID_HOME/crs/install/ -verbose -deconfig -force

On the last node of the cluster execute the following as the root user:
# perl $GRID_HOME/crs/install/ -verbose -deconfig -force -lastnode

Now you will be in a state where you can re execute the command.

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