Icinga2 documentation clearly describes the master->satellite->client setup, but as of now everything can be configured using director module and top down approach, so you can easily monitor external remote networks that are not accessible from the master server.
free utility is used to display the amount of free and used memory in the system. Debian Stretch provides an upgraded package. Output format has changed, and available memory is calculated using a different method, so let’s see what we can do with these modifications at this moment.
Icinga is a great monitoring solution, especially when you use director module to perform configuration in top down environment. It makes application more accessible to more people as you can use web-interface and role based permissions to allow developers and testers to write and use their own checks and notifications.
Install Icinga 2 monitoring instance with web-interface.
If you have ever wondered how to perform real-time performance monitoring on a number of virtual hosts scattered across multiple locations, then install and use netdata application.
I have described a simple way to configure the AWStats web-interface last month,
so I will continue this topic further and tell you how to add a menu to quickly switch between configured sites.
It is an interesting thing to know how to parse and process Linux Software RAID events.
It is also beneficial as you can automatically take appropriate action immediately after a certain event occurs.
Recently described hddtemp application does not contain every possible hard drive in its database. I’ll be honest here, its development stopped many years ago, but it is still very useful, so I will shortly describe how to add new hard drive to the database.