Nagstamon

The idea behind Nagstamon, just like the name suggests, is that it keeps you informed. It won't nag you, but it will be there with fresh information regarding your server hosts. The status bar itself is not at all annoying. It can be placed in the most visible corner of your desktop for the best possible results, or it can be hidden in a corner if you want it to be less observable. It's all up to you in this regard.

The app itself can offer information regarding Hosts, Services, and History. If you're not there when something crucial happens, check the History option on the toolbar. Adjust filters and other markers to have any error immediately displayed. Remain informed at all times without too much hassle. The application also features an editable color-code error system. If the default colors do not carry any meaning, you can easily change all that to your liking.

Probably the most interesting aspect when checking hosts and online services is the adaptable environment you do that in. With Nagstamon you'll have that exact opportunity. Decide on your need for certain notifications, sticky acknowledgment, or comments. Will the downtime be fixed or flexible? What is the duration of a typical downtime expected to be? What type of monitor will you use? Is it going to be the classical Nagios or will you opt for something less known like Thruk, Zabbix, and so on?

One can also change the way the status bar behaves or shows certain information. Opt for a more detailed view type or the simple, down-to-earth version. Opt for the exact way you'd like to access the app itself. Make it a floating status bar, an icon in your tray, a window, or a full-screen program. Nagstamon is by far the most versatile host and service monitor there is, with so many details it's hard to keep up at times.