$ Linux Command

System

iostat

Report CPU and disk IO statistics.

performancediskcpumonitoring

Additional Notes

iostat is a system command used to report CPU and disk IO statistics. It helps diagnose performance issues by showing CPU utilization and per-device I/O statistics.

iostat is typically provided by the sysstat package. Running it repeatedly with an interval (e.g., iostat 1) produces continuous monitoring output.

Syntax

iostat [options] [arguments]

Parameters

  • options: Flags that change how iostat behaves.
  • 'interval': Seconds between reports.
  • 'count': Number of reports (optional).

Common Options

  • -x: Extended disk statistics.
  • -d: Device utilization report.
  • -c: CPU report.
  • N: Repeat every N seconds.

Examples

iostat
iostat -xz 1
iostat -d 2 5

Practical Notes

iostat is often provided by the sysstat package.