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  • PID In Linux

     

    PID In Linux

     

     

    PID In Linux


    A PID is an acronym for the process identification number. PID is automatically assigned to each process when it is created on a linux operating system. The init or systemd is always the first process on the linux operating system and is the parent of all other processes. PID In Linux




    How do i find the PID in linux?


    1) Open the terminal application
    2) Type the pidof command as follows to find PID for firefox process: pidof firefox.
    3) Or use the ps command along with grep command as follows: ps aux| grep -i firefox/
    4) To look up or signal processess based on name use.


     

    Every time a user or the system (Linux) launches a program, the kernel will create a process. A process holds execution details of the program in memory such as its input and output data, variables and so on.

    Importantly, since Linux is a multitasking operating system, it executes several programs simultaneously.

    The kernel identifies each process using a process ID (PID), a every instance of process must have a unique PID from other processes which is assigned when the process is invoked, to avoid any execution errors.

    The /proc file system stores information about currently running processes on your system, it contains directories for each process.



    $ ls /proc
    OR
    $ ls /proc | less

     

     

     


    You can monitor processes and their PIDs using traditional Linux commands such as ps, top and relatively new glances command plus many more as in the examples below:


    $ ps aux
     

     

    Show Running Processes with PID

     

     


     

     

     


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