Changing the /tmp cleanup frequency
The tmp directory is cleared by default at every boot as the TMPTIME in /etc/default/rcS is is 0 by default.
TMPTIME says how frequent the tmp dir should be cleared in days so changing this value to a different (positive) number will change the number of days a file can survive in /tmp.
This would allow files to stay in /tmp until they are a week old, and then delete them on the next reboot.
A negative number TMPTIME=-1 tells the system to never delete anything in /tmp.
This is probably not something you want, but is available.
BUT
there are server that almost never reboot so setting up an entry in the crontab it would fix the issue:
crontab -e
and we add:
0 5 * * 1 rm -rf /tmp/*