system monitoring tools

LinuxLinks: "Now, let's explore the 9 system monitoring applications at hand. For each title we have compiled its own portal page, a full description with an in-depth analysis of its features, screenshots, together with links to relevant resources and reviews."

nixCraft: "Need to monitor Linux server performance? Try these built-in command and a few add-on tools. Most Linux distributions are equipped with tons of monitoring.

These tools provide metrics which can be used to get information about system activities."