Oracle application or database failures due to files being deleted within the /tmp or /var/tmp directories

Issue

• There have been reports of randomly occurring hangs/crashes of the oracle DB. Oracle team has found out the cause is that file(socket files) are getting delete from /var/tmp/.oracle.
• Oracle critical files are being deleted out of /tmp, how do we avoid that occurring?
• The databases /var/tmp/.oracle socket is being deleted after a couple of weeks. What is causing that, and how do we stop it?