Applicable to Red hat and all Derivatives including CentOS and ClearOS. *More distributions may be effected.
The /tmp folder in these distributions will take files intended for the /tmp directory, and relocate them to a folder within the /tmp directory. Ex /tmp/Systemd-private-%algorithm%-Servicename/tmp/%yourfiles%.
If you are required to write to this directory, the service responsible for moving this program requires the PrivateTmp=true entry within the service configuration file to be changed to PrivateTmp=False. Please review and understand the implications this will have on the security of your system before making these changes.