Record your own common process management commands

Process: Executing program (all system files are called through the kernel, one service corresponds to multiple processes)

Threads: One or more execution units (function modules) contained in a process are called threads.

(multiple threads make up a process)

Web site: Multi-process Programs MySQL Database: single-process multithreading

The role of the management process: 1, determine the health status of the server

2. View the system process (determine if there is a malicious process)

3, forcing the termination of a process that cannot be closed by normal means

Ps-aux/pu aux view all processes in the current system

-a displays all processes in a terminal, except session leader

User and memory of the-U process

-X is not controlled by the terminal process

-l display in long format

-E Show All processes

-F Full Output

PS Command View information (partial)

%men: The percentage of physical memory that the process occupies

Vsz: Virtual memory RSS: Real memory TTY: Terminal mode

Time: Process consumes CPU

Ps-le View information display (partial)

UID: This process is called by which UID ADDR:-Indicates the running state

PPID: ID number of the parent process Wchan: virtual memory address

C:CPU usage sz: How much memory the process consumes

PRI: Priority NI: Administrator-Set Priority

Dynamic viewing of system processes

Top command

-D seconds updates every few seconds

-N times Top Command execution count

-P Specify PID

-U listens on a user process

Kill process

Kill-9 PID number forced shutdown process

Killall-9 forcing termination of all associated processes for a service

PKILL-T Terminal number kick off the remote terminal process

- u based on user name     

Resource Management

Vmstat Explorer

Vmstat 1 3 Refresh delay Refresh Count

This article is from the "Xfell" blog, make sure to keep this source http://xfell.blog.51cto.com/11905879/1870566

Record your own common process management commands