In this article, we will learn about Linux PS command and also learn How it is used in Linux and other Linux distributions. If you are a Linux user or a Linux system administrator, then you should know in detail about the use of this command and its other options.
In Linux, many services or processes can be run simultaneously, similarly, through the command PS whose full form is Process Status, all the processes running in the system can be seen according to their PID. It reads all the information related to the process from the Virtual /proc file system.
Run PS Command
As you can see in the screen below, what kind of result you will get after executing the PS command.
PID – Any process (service) running in Linux has a unique ID.
TTY – The full form of TTY is terminal type, which shows that the process has been run on the key terminal.
TIME – Indicates the value of the process that is currently running in minutes and seconds
CMD – By which command the process command has been run
some other options of ps command
If you don’t know much about Linux PS Command and you want to read some manual document about it then you should use the help command. See the below screenshot for how to get the help command for the ps command.
man ps
To check the All process running in the system, run the below command. With the -A option, you can check the current terminal as well as another terminal process.
ps -A
If you run the command ps -e instead of ps -A, you will still get the same result.
ps -e
Check Current Terminal Process If you want to check only the process related to this terminal then you run the below command
ps -T
Check All process To check all the processes in the system, run the ps -ax command.
ps -ax
To Check Process In BSD Format To see all the processes running in the system in BSD format, run the ps au or ps aux command.
ps au ps aux
Also Read: How to install Linux step by step
Check Process by a specific user To see all the processes run by a specific user, type the name of that user after the flag -U. As given in the below screenshot
ps -u siyaram
Check Path Of the Process If you want to see the absolute path of a particular process with the PID, use the -L flag.
ps -L 3564
Check Process Run Buy Root if you want To check all processes which were run by the root user, execute the below command.
ps -U root -u root
Search Process By PID If you want to search the process with the help of PID then use the command given below
ps -c PID_Number ps -c 2200
Search PID By Process Name If you want to search process ID with the help of PID name, then use the command given below
ps -C Process_Name ps -C chrome
Use Grep Command to search PID If you want to find process id or other information related to PID with the help of the grep command, you can run the below command
ps -ef |grep cat
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