HOW LONG DO FILES STAY IN /TMP BEFORE BEING DELETED? As a general rule files that have a creation date older than 60 days are candidate for deletion. This rule is flexible in in regards to space constraints (id est, the largest, oldest files go first). Each system has about 2048MB or more of /tmp space and is not NFS mounted. Please be thoughtful about what you put in tmp, while permissions you set on those files and what the current usage of /tmp is.