How to update time

[aninoj]

I download a Zabbix precompiled image. Now, I wan to update time, because in the machine is not OK. How can I do this?

[aninoj]

I resolve the problem changing in Bios the clock...

[cstackpole]

You can always use NTP to keep your system time correct.
apt-get ntp ntpdate
or
yum install ntp ntpdate

then do something like
ntpdate 1.debian.pool.ntp.org (or whatever other ntp server you know of)
to grab the correct time and then to run it so it auto corrects do
/etc/init.d/ntpd start

you can configure the ntp host and lookups in /etc/ntp/ntp.conf