I'm looking for a software enables me to monitor many servers at the same time, like a dashboard for example.

Best Regards,
Hassan

Nagios
http://www.nagios.org/

Nagios with the Nagios plugins is the system used by many for core monitoring. It can be setup to do any kind of monitoring you want (e.g. simple ssh to servers to run commands in scripts or snmp). For most UNIX/Linux servers you can install NRPE and use Nagios to run check_nrpe to query those. On Windows servers you can install NSClient++ (NSCP) which has various modes including an nrpe mode that can be used to query those. There are also dozens of plugins written for specialize monitoring (e.g. for MySQL DBs, Postgresql DBS, CUPs queue checking etc...)

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There's also OpenNMS as well. Both have their pros and cons, I'm usually good with either.

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Interestingly the Nagios site touts their selection "by a landslide" as best monitoring system in the LinuxQuestion votes. Of course votes don't necessarily mean anything - it was just the first time I'd seen a site referencing the LQ votes.

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Polls are useless for sure. I never base my own preferences by others opinions. Like I said, I've used plenty of monitoring solutions, I'm actually fine with either Nagios or OpenNMS, I love and hate both almost equally.

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