We’ve covered top, atop and indirectly due to it’s popularity as top’s alternative… htop (the last screenshot). But are there any others worth looking at? That was the question today in the ask.haydenjames.io Linux forum. This is largely a matter of preference regarding what data is most important to you as it pertains to system health and performance. Although somewhat standard, we all prefer different ways of viewing the same thing.
Since the three aforementioned system monitoring tools can hold their own quite easily, I’ll focus on two alternatives which I believe can also hold their own as replacements or at least compliments of top and htop. They are, Glances and nnom.
Glances – system monitoring tool written in Python
Glances is open-source software to monitor and collect operating system statistics. Glances aims to present the max amount of information, in the minimum amount of space. It can adapt dynamically when displaying system information, depending on the terminal size. Remote monitoring can be done via terminal, Web interface or API (XMLRPC and RESTful). Glances is written in Python and uses the psutil library to get information from your system. Stats can also be exported to external time/value databases.
nmon – Nigel’s performance Monitor for Linux
nmon is a systems administrators tool, for server tuning, benchmarking or viewing detailed system performance information. It outputs data in two ways. Either on screen (command line) or after saving data to a comma separated file for analysis and longer term data capture. Honestly, one screenshot isn’t enough for nmon. Have a look at additional screenshots with explanations.Alternatives to #top and #htop - we all prefer different ways of viewing the same thing.Click To Tweet
Even more top and htop alternatives: net-tools, iptraf, collectl, dstat, iostat, sar, saidar and vmstat. Looking for more insight and/or APM tools? Have a look at my 50 Top Server Monitoring & Application Performance Monitoring (APM) Solutions post (includes free and paid solutions).