Linux Top explanation

Operation Example:

Enter "Top" on the command line

You can start the top

Top Full Screen Dialog mode can be divided into 3 parts: System Information Bar, command input field, process list bar.

The first part-the top System Information Bar:

First line (top):

"00:11:04" is the current time of the system;

"3:35" is the operating time of the system after it has been started;

"2 Users" is the user who is currently logged on to the system, more specifically the number of terminals logged on to the user-the same user at the same time to the system of multiple terminal connections will be treated as multiple users connected to the system, here the number of users will also be displayed as the number of terminals;

"Load average" is the average of the current system load, the following three values are 1 minutes ago, 5 minutes ago, 15 minutes ago The average process, the general can be thought that this value exceeds the number of CPUs, the CPU will be more strenuous load the current system contains the process;

Second line (Tasks):

"Total" is the current number of system processes;

"1 Running" is the number of processes currently in operation;

"Sleeping" is the number of processes currently in the waiting state;

"0 stoped" for the number of system processes stopped;

"0 Zombie" for the number of processes restored;

Third line (Cpus):

The current utilization rate of CPU is indicated respectively;

Line Four (MEM):

The total amount of memory (www.111cn.net), current usage, idle memory, and amount of RAM in buffer use are indicated respectively.

Line Five (Swap):

Represents the category with the fourth line (MEM), but here reflects the use of the Swap partition (swap). Typically, swap partitions (swap) are frequently used, and will be seen as a result of insufficient physical memory.

The second part--the inner command prompt bar of the middle part:

In the top run, you can control how processes are displayed through the internal commands of top. The internal command is the following table:

S

-Change the screen update frequency

L-Turn off or turn on the representation of the first line top information in the first section

T-turn off or turn on the second line of the first section Cpus information representation of the Tasks and the third row

M-Turn off or turn on the first part of the four-line Mem and fifth line Swap information representation

N-the list of processes in the order of the PID size (the third part is described later)

P-List of processes in the Order of CPU Utilization (third part)

M-Arrange the list of processes in the Order of Memory occupancy (Part III)

H-Show help

N-Set the number of processes displayed in the process list

Q-Exit Top

S-

Change the screen update cycle

Part Three-the bottom part of the Process list bar:

A list of processes that are separated by PID will be updated periodically based on the Set screen update time. The top internal command lets you control how it is displayed here
From:http://www.111cn.net/sys/linux/53256.htm

Linux Top explanation