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}}