uptime  gives a one line display of the following information.  The current time, how long the system has been run‐
       ning, how many users are currently logged on, and the system load averages for the past 1, 5, and 15 minutes.

   This is the same information contained in the header line displayed by w(1).

 System load averages is the average number of processes that are either in a runnable or uninterruptable state.   A
       process  in a runnable state is either using the CPU or waiting to use the CPU.  A process in uninterruptable state
       is waiting for some I/O access, eg waiting for disk.  The averages are taken over the three time  intervals.   Load
       averages are not normalized for the number of CPUs in a system, so a load average of 1 means a single CPU system is
       loaded all the time while on a 4 CPU system it means it was idle 75% of the time.

No path given, trying /var/log/bootchart.tgz
warning: path '/var/log/bootchart.tgz' does not exist, ignoring.
Parse error: empty state: '/var/log/bootchart.tgz' does not contain a valid bootchart