iostat

Use iostat to display informations about CPU statistics, input/output statistics for devices, partitions and network filesystems (NFS).

The basic syntax for the iostat command is:

iostat [delay [count]]

delay

The delay between updates in seconds. If no delay is specified, only one report is printed with the average values since boot.

count

Number of iterations. If no count is specified and delay is specified on command line, count defaults to infinity.