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iostat
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<p>iostat (<i>input/output statistics</i>) is a computer <a href="/facts/System_monitor/xnNgtTvF">system monitor</a> tool used to collect and show <a href="/facts/Operating_system/8XTuvMh2">operating system</a> <a href="/facts/Computer_data_storage/wPHKFpdx">storage</a> input and output statistics. It is often used to identify performance issues with storage devices, including local <a href="/facts/Disk_storage/hnsXRb5X">disks</a>, or remote disks accessed over network file systems such as <a href="/facts/Network_File_System/jWRRALVo">NFS</a>. It can also be used to provide information about <a href="/facts/Computer_terminal/fSlx05qV">terminal</a> (TTY) input and output, and also includes some basic CPU information. </p>