Whether you’re resource-conscious, investigating a system slowdown, or, like me, plain nosey, Ubuntu makes it easy to keep an eye on CPU, RAM and other hardware information.
Below are five different ways to monitor system resource usage in Ubuntu – from indicator-applets to included applications…
Indicator-SysMonitor does a little, but does it well.
Once installed and run, it displays CPU and RAM usage on your top panel. Simple.
rest here