Linux system view process

Pioneer of code farmers 2021-01-21 08:14:20
linux view process


A process is an address space in which one or more threads are running and the system resources required by these threads . stay Linux System There are a lot of command . So what command You can view all the running processes ?

You can use ps command . It can display information about the currently running process , Including process PID.Linux and UNIX All support ps command , Displays information about all running processes .ps Command can provide a snapshot of the current process . If you want, the status can be refreshed automatically , have access to top command .

ps command

Enter... Below ps command , Show all running processes :

# ps aux | less

among ,

-A: Show all processes

a: The display terminal includes all processes of other users

x: Show processes without control terminals

Mission : Look at every process in the system .

# ps -A
# ps -e

Mission : View non root Running process

# ps -U root -u root -N

Mission : To view the user vivek Running process

# ps -u vivek

top command

top The command provides a dynamic, real-time view of the running system . Enter... At the command prompt top:

# top

Output :

 How to be in Linux See how all running processes work in Linux View all running processes in the

chart 1:top command : Show Linux Mission

Press q sign out , Press h Enter help .

Displays a tree view of the process

pstree Show running processes in a tree . The root node of the tree is pid or init. If a user name is specified , The process tree will take the process owned by the user as the root node .

$ pstree

Output example :

 How to be in Linux See how all running processes work in Linux View all running processes in the

chart 2:pstree - Displays a tree view of the process

Mission : Use ps Print process tree

# ps -ejH
# ps axjf

Mission : Get thread information

Enter the following command :

# ps -eLf
# ps axms

Mission : Get security information

Enter the following command :

# ps -eo euser,ruser,suser,fuser,f,comm,label
# ps axZ
# ps -eM

Mission : Save the process snapshot to a file

Enter the following command :

# top -b -n1 > /tmp/process.log

You can also email the results to yourself :

# top -b -n1 | mail -s 'Process snapshot' you@example.com

Mission : Find the process

Use pgrep command .pgrep Can find the currently running process and list the qualified processes ID. For example display firefox The process of ID:

$ pgrep firefox

The following command will display the process name sshd、 Owner is root The process of .

$ pgrep -u root sshd

towards htop and atop say hello

htop It's a similar top Interactive process view tool for , But you can scroll vertically and horizontally to see all the processes and their command line . Process related operations (killing,renicing) No need to input PID. To install htop Enter the command :

# apt-get install htop

or

# yum install htop

Enter... At the command prompt htop:

# htop

Output example :

 How to be in Linux See how all running processes work in Linux View all running processes in the

chart 3:htop - Interactive Linux / UNIX process viewer

atop Tools

atop It's one to see Linux Interactive monitoring tool for system load . It can show the key hardware resources at the system level ( From a performance perspective ) Usage situation , Such as CPU、 Memory 、 Hard disk and network .

It can also be based on the process level of CPU And memory load shows which process caused the specific load ; If the kernel patch has been installed, it can display the hard disk and network load of each process . Enter the following command to start atop:

# atop

Output example :

 How to be in Linux See how all running processes work in Linux View all running processes in the

From the original :https://os.51cto.com/art/201101/244090.htm

This paper addresses :https://www.linuxprobe.com/linux-look-process.html edit : Zhang Xiong , Auditor : Add treasure

Linux The command of :https://www.linuxcool.com/

That's all Liangxu tutorial website For all of you Linux Related knowledge .

版权声明
本文为[Pioneer of code farmers]所创,转载请带上原文链接,感谢
https://javamana.com/2021/01/20210121081319705f.html

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