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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