iostat Command: Linux Performance Guide

The iostat command is a tool used to monitor performance metrics such as disk, CPU, and network on a Linux system. It provides real-time and average statistical information about disk and CPU usage on the system.

Common uses of the iostat command include:

1. Check the disk usage:
2. Check disk input/output statistics
3. Check the usage status of a specific disk:
4. Display disk statistics for a specific disk device with the command “iostat -d [disk device name]”.
5. Check the CPU usage.
6. Show me the CPU statistics.
7. Check the usage status of network devices.
8. Show network statistics.
9. Set the interval for data refresh:
10. iostat -d [time interval (seconds)]
11. Run in batch mode and output to a specified file.
12. Capture disk I/O statistics at regular intervals for a specified number of times and save the output to a file.
13. View help information:
14. Show me the disk I/O statistics in a human-readable format.

Please note that the iostat command requires the sysstat software package to be installed.