How to Monitor Linux Systems Performance with iostat command

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iostat command is used to monitor CPU utilization and I/O (input /output) statistics of all the disks and file systems. nfsiostat command is used to monitor i/o statistics of network file system(NFS).

iostat command monitor the I/O (Input/Output) devices loading by means of observing the time, devices are active with respect to their average transfer rates. This command is especially helpful for generating reports that we can use to optimize the system’s input & output load.

iostat command generally generates two reports:

CPU utilization report All disks i/o statistics report

To generate the reports, iostat command reads some of

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