View cpu usage in linux

In linux, view the cpu usage-Linux Enterprise Application-Linux server application information. The following is a detailed description. Permission: All Users

Usage: top [-] [d delay] [q] [c] [S] [s] [I] [n] [B]

Description: displays the process status in real time.

Count?
D: Change the display update speed, or press s in interactivecommand

Q: there is no delay in display speed. if the user has the superuser permission, top will be executed in the highest priority.

C: Switch the display mode. There are two modes: one is to display only the name of the execution file, and the other is to display the complete path and name S: accumulative mode, accumulates the CPU time of the completed or disappearing sub-itinerary (deadchildprocess ).

S: security mode. Cancel negotiated commands to avoid potential crisis.

I: Do not display any idle (idle) or useless (zombie) itinerary

N: number of updates. After the update is completed, the system will exit the top

B: The batch file mode, used together with the "n" parameter, can be used to output the top result to the file.

Example:
Show 10 updates and exit
Top-n 10

The user will not be able to use the negotiated command to run the following command on the itinerary: top-s

Input the result of the second update display to the file named top. log: top-n 2-B <top. log