System & processes monitoring recomendations?

[Anton Blajev - Valqk]

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Hello Group,

I'm wondering what tool to use for system and processes monitoring?
For example your disks goes filled and you get a mail,
the machine has load over 50 for more than an hour and you get a mail...
Some predefined processes MUST be running so there is some kind of a checker and if they stops
the util starts them immediately.

Please share your experience with me?

Thanks!
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