Displays a list of currently executing processes, ordered by the percentage use of CPU time.
top [q] [d interval]
q: requires top performance with the highest possible priority (for this you should be a privileged user).
d: interval specifies the interval in seconds between updates of information.
top command generates full-screen record of running processes with their share use of CPU time. By default, top updates every 5 seconds. For the termination of top press <q> or <ctrl-s>.