Describe what the `us`, `sy`, `id`, and `wa` columns represent in the CPU section of `vmstat` output. How can these values help you understand CPU utilization?
us,sy, id and wa columns represent the percentage of time the CPU is spending on user tasks, system(kernel) tasks, idle-time and waiting for I/O. Using these values we can interpret how much of the system is free and how much is in use.
