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NI: ‘Nice’ Value of the corresponding task. PR: Priority of the the corresponding task.

USER: User name of the the corresponding task owner. PID: The unique process id of the corresponding task. Here is a quick explanation of some of the important columns displayed by the top tool : The top half of the display shows the processes’ statistics and resource usage, while the lower half shows the currently active list of processes. It displays a summarized, interactive, column-based list of threads and processes handled by the Linux kernel. The top command provides a dynamic, real-time overview of your system’s current workload. In order to see this in action, open up your terminal and type in: The ‘top’ command can display the processes that are eating up large amounts of memory.