Where i can check a log about the last reboot time of my freebsd box

[JJB]

owner-freebsd-isp at freebsd.org wrote:
> Hi, im having troubles with a freebsd box, suddenly this fbox
reboots
> many times on a day, every hour at least, :(, i dont know what
could
> be happening, this fbox was working great, i'd like to know if a
log
> on the system could helpme to check if a program or process is
making
> some bad things..
> With this box i share internet to many clients.. am worried :(.
> thanks in advance.
>
> Carlos Alarcón
>

A normal running system that suddenly starts rebooting its self is
more that likely an overheating problem caused by a thick layer of
dust on the motherboard chips or early signs of a failing power
supply.  You will not find any log error messages about this.