sar

Monitor performance of various Linux subsystems. More information: https://manned.org/sar.

• Report I/O and transfer rate issued to physical devices, one per second (press CTRL+C to quit):

sar -b 1

• Report a total of 10 network device statistics, one per 2 seconds:

sar -n DEV 2 10

• Report CPU utilization, one per 2 seconds:

sar -u ALL 2

• Report a total of 20 memory utilization statistics, one per second:

sar -r ALL 1 20

• Report the run queue length and load averages, one per second:

sar -q 1

• Report paging statistics, one per 5 seconds:

sar -B 5