What is the command to see CPU load of a RedHat Linux server?
Personally I think looking at the average load of a period is best. Otherwise you might get quite different values depending on the timing. (e.g. enter a command and press [Enter] might yield a different result than if you pressed [Enter] a fraction of a second later.)
Some ways of checking the load average are:
If you have one core then a load of 1 more or less indicates that core is busy 100% of the time. This number can exceed 1 (or 100%). If that happens there is on average more then one process in the run queue.
If you have multiple CPU's then 100% (or 1.00) means that one average one core is busy all the time. E.g. with 4 core this could mean 1 core running flat out and 3 cores being idle. Or 4 cores running ¼ of the time.