Is it possible to setup a regular reboot via <shellcmd>?

We have 1.2b9 running on a 32MB Soekris 4511 board with an ISP that 
provides 2 minute DHCP leases(!).  And it seems that every lease renewal 
chews a tiny bit of RAM. On the 64MB board we previously used this would 
take weeks before becoming a problem, now it seems to take a couple of 
days. (We're not entirely sure, still reading tea leaves, oops I mean 
the remote syslog entries, looking for clues).

So ... we thought if it was simple enough, we'd add a shellcmd to reboot 
the box every 24 hrs or so.

Has anyone tried this?  Did it work?  I'll write up whatver solution I 
get so it can get added to the wiki and/or docs.

Thanks in advance!

cheers, michael
www.socalfreenet.org