Discuss the iostat command and its output.
What will be an ideal response?
iostat. Displays CPU and input/output (I/O) statistics for devices and partitions. This command generates reports that can be used to change system configuration to better balance the input/output load between physical disks.
The first generated line provides statistics concerning the time since the system was booted. Each subsequent line covers the time since the previous line. You can generate two types of reports with the command:
CPU usage report
Device usage report
The -c option generates only the CPU usage report; the -d option generates only the device usage report. Using the -x option displays extended statistics for the device usage report.
iostat can be used to continuously monitor the usage. To do so, add two numbers to the command. The first number defines the interval in seconds when the output will be updated. The second number defines how many intervals the command should use. If you omit the second number, you need to stop the command by using Ctrl+c.
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