Process-use the top command to dynamically View process information

Although the ps command can display a lot of information about the machine running status, it only provides a snapshot of the machine status when the ps command is executed

Introduction

Although the ps command can display a lot of information about the machine running status, it only provides a snapshot of the machine status when the ps command is executed.

To view the dynamic view of machine running status, use the top command: [allyes_op @ allyes ~] $ Top.

The top program will continuously update and display the current information of the system process in the form of a list in the order of process activity (updated once every 3 seconds by default ).

It is mainly used to view the running status of the highest process in the system. The top name also comes from this.

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The top command displays two parts.

Top Display

The system overall status information is displayed on the top.

Top-12:06:32 up 333 days, 1 user, load average: 0.00, 0.00, 0.00

Task: 198 total, 1 running, 197 sleeping, 0 stopped, 0 zombie

Cpu (s): 0.0% us, 0.0% sy, 0.0% ni, 99.8% id, 0.2% wa, 0.0% hi, 0.0% si, 0.0% st

Mem: 4044144 k total, 4006032 k used, 38112 k free, 756872 k buffers

Swap: 4192924 k total, 160 k used, 4192764 k free, 2796696 k cached

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Fields in system overall status information

Line	Field	Description
1	Top	Program Name
1	12:06:32	Current time
1	Up 333 days	Normal running time
1	1 user	One user has logged on
1	Load average: 0.00, 0.00, 0.00	Load mean.
2, 3	Task: 198 total, 1 running, 197 sleeping, 0 stopped, 0 zombie Cpu (s): 0.0% us, 0.0% sy, 0.0% ni, 99.8% id, 0.2% wa, 0.0% hi, 0.0% si, 0.0% st	Displays the number of processes and the status of each process.
4	Mem: 4044144 k total, 4006032 k used, 38112 k free, 756872 k buffers	For example, the usage of RAM (random access memory)
5	Swap: 4192924 k total, 160 k used, 4192764 k free, 2796696 k cached	Display the usage of swap space (virtual memory)

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Help instruction

H

Show Help page

Q

Exit top command