If you're interested in monitoring your system's performance, but want to see more information than the GNOME System Monitor applet can display, GKrellM is the tool for you. It's the Swiss army knife of graphical monitoring tools, offering more than a dozen built-in monitors (which run in a single process) and supporting both plugins and themes.
Once installed, GKrellM is available on the System Tools submenu. Pressing the PgUp or PgDown keys while the GKrellM window is focused will cycle through available themes, and right-clicking on the GKrellM window will open the configuration window (as shown in the screenshot) with hundreds of options available for fine-tuning the information presented (you may need to experiment -- right-clicking on different parts of the window may open different configuration dialogs).
A number of GKrellM plugins are available from the Fedora repositories, including analog, sun, and moon clocks, a frequency monitor, hard disk temperature display, weather monitor, and more. The gkjrellm-themes package includes a number of additional themes for customizing the program's appearance.
Installing from the command line: yum install gkrellm Installing using the graphical installer: Base System > System Tools > gkrellm Menu location after installation: > Applications > System Tools > GKrellM System Monitor Command: /usr/bin/gkrellm Upstream website: http://members.dslextreme.com/users/billw/gkrellm/gkrellm.html