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Fundamentals of Linux by Oliver Pelz

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iotop

To get a live view of the input and output, or short I/O, bandwidth usage of your system, type iotop. iotop needs to be started with the root user. You can use iotop, for example, to learn how fast your hard disk can read and write, then press the q key to exit. Read the manual section on iotop to learn more about its shortcuts, for example, for sorting columns.

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