The official documents are described as follows:
3 Installing Oracle Grid Infrastructure and Oracle Real application Clusters
Caution:
After installation are complete, does not remove manually or run cron jobs that remove/tmp/.oracle or/var/tmp/.oracle Direc Tories or their files while Oracle software are running on the server. If you remove these files and then the Oracle software can encounter intermittent hangs. Oracle Clusterware installations can fail with the error:
Crs-0184:cannot communicate with the CRS daemon.
After installation, under the normal operation of RAC, can not manually move or delete/tmp/.oracle,/var/tmp/.oracle, if removed, will cause intermittent hang,oracle cluster software will also have an error.
Remember:
You cannot delete a RAC if it is running！
If the file is deleted, the re-CRS will be re-established automatically!
If the directory is deleted, you can only refer to the following command to rebuild the
Create the/var/tmp and/var/tmp/.oracle Directory:
/bin/mkdir-p/var/tmp/.oracle
/bin/chmod 01777/var/tmp/
/bin/chown root/var/tmp/
/bin/chmod 01777/var/tmp/.oracle
/bin/chown root/var/tmp/.oracle
/tmp/.oracle,/var/tmp/.oracle if deleted, what should I do?
