It's probably a crontab event running on your system. Some distros
probably do this by default.
You can do a "crontab -e nobody" or "crontab -e" (both as root) and see if
there is something like this in there. If so, you can either comment it
out or put a pipe to the mail command to email yourself the status.
> Date: Sun, 26 Mar 2000 11:05:35 -0500 (EST)
> From: John Anthony Kazos Jr. <[EMAIL PROTECTED]>
> To: Linux-Admin Discussion <[EMAIL PROTECTED]>,
Linux-Config Discussion <[EMAIL PROTECTED]>
> Subject: Does /tmp clear out periodically?
>
> I have been mysteriously losing files, but only from /tmp, and it is pissing me
> off. Does /tmp periodically clear out its files? If so, how do I turn this off,
> and *why was there no information stating this happens*?
>