Had deleted the /usr/bin, /usr/sbin directories of a node

Dear All,
I have ended up into deep trouble a few minutes ago: We have 2 node RHEL 6b-bit Oracle RAC.
I had issued 'rm -rf /usr' command and in a few seconds i realised and then aborted the above process by issuing 'Ctrl-C'. I found following missing: bin, sbin, evolution28, remoteagent, java, include missing.
As of now the Node and the Oracle database is working fine.
Please let me know if I can copy the missing directories from the another node, as both the nodes are Identical (Just a wild guess).
We do not have a backup of the RAC machines.
Please help me on this.

We had actually contacted our Network Admin to look into the issue, and things went worst when he copied the '/usr/bin' directory from one node to the other. The machine went to halt and rebooted with a blank screen.
Moreover, we were unable to make any connections to the node, though the other node and the database are working fine.server halt... if you use linux (redhat) you can boot by CD or DVD (rescue), after boot from CD...
You can mount disk and set up network ....
So, You can copy /usr/bin/ + .... from another nodes to this server.
As per my knowledge and experience, will it be fine if I format the machine and install Linux/Oracle freshly and then add this to the cluster?
Should I unregister the old node from the cluster or let it remain as it is and follow the process of adding a new node.if you need to delete node and then add node, you can read from oracle documents
http://download.oracle.com/docs/cd/B28359_01/rac.111/b28254/adddelunix.htm
http://www.oracle.com/pls/db102/homepage

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