Create monitoring dashboards with SSH, command-line tools, and Node-RED.

Admins and power users like to watch the load on their computers. Glances lets you see immediately if something is wrong.

Use Zabbix to keep tabs on all your machines across the network.

What cannot be measured cannot be improved. Netdata lets you measure almost anything – at least as long as it's about the performance and health of a Linux computer.

Stacer is a handy graphical tool for cleaning up your Linux system.

Programs rarely reveal what they are doing in the background, but a few clever tools, of interest to both programmers and administrators, monitor this activity and log system functions.

Beyond flashing web emoticons, animated gif images can present trends that catch your eye in system monitoring.