Sorry, Gmail got send-happy on me....

Smokeping: http://oss.oetiker.ch/smokeping/
MRTG: http://oss.oetiker.ch/mrtg/
RRDTool: http://oss.oetiker.ch/rrdtool/

These require a lot of tuning on different levels to make work well
for a given environment.  Something more out-of-the-box, but with a
price tag:

http://www.ipswitch.com/products/whatsup/index.asp

We use it to monitor ping, tcp services, disk utilization, etc.  It's
pretty easy to use and you can configure actions on alarms to email or
txt message admins.

dpk


On 8/15/07, Dennis Kelly <[log in to unmask]> wrote:
> Decent free tools:
>
> Smokepinghttp://oss.oetiker.ch/smokeping/
>
>
> On 8/15/07, Mohomed Elamin El Rashid <[log in to unmask]> wrote:
> > I was wondering what IT people using to monitor production server. I
> > appreciated if you send me some tips about software or tools that can
> > monitor servers and capable of sending email. I have over 50 server.
> > Please, send email to [log in to unmask]
> >
> > Thank you
> >
> > Amin Elrashid
> >
>