PID (Process IDentifier) is the number that identifies a process running on a operational system.

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why is PID 0 reading/writing large amounts of data

Just booted my PC up and it was running slower than usual. I went into the resource monitor and its saying that System PID 0 is reading and writing 100,000,000B/sec and its accessing all drives for ...
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52 views

Is /var/run/user/$UID the new /var/run for PID files?

I have an application (running as a service as root) that creates a PID file under /var/run. But I'm wondering whether this is now no longer best practice. In Linux - alternative places where to ...
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3answers
861 views

How to identify terminated Windows process if I still have its PID?

Background: In the middle of my work, license agreement for installing "Microsoft Mouse and Keyboard Center" suddenly appeared. I'd like to understand what process launched the setup, but using ...
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6answers
28k views

How to get the pid of a running process using a single command that parse the output of ps?

I am looking for a single line that does return the pid of a running process. Currently I have: ps -A -o pid,cmd|grep xxx|head -n 1 And this returns the fist pid, command. I need only the first ...
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6answers
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If I know the PID number of a process, how can I get its name?

If I have the PID number for a process (on a UNIX machine), how can I find out the name of its associated process? What do I have to do?
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46 views

Windows 7 - missing PID in services tab, task manager

So, as stated in the title, PID tab is missing from services tab in task manager. I need PID in order to find a windows service, which causes lots of hard page faults in my system. Any way to fix ...
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23 views

Why don't ALL Active Connection PID's show up in Task Manager INCLUDING those shown when using the “netstat -ano” command?

I am using Windows 7, but this may be the same in other versions of windows. Why don't ALL Active Connection PID's show up in Task Manager INCLUDING those shown when using the 'netstat -ano' command? ...
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1answer
31 views

PID of commands run as different user

While being a root, I want to start a service as a specific user and write its PID file. Minimal nonworking example: if [ $UID -eq 0 ]; then su myuser <<EOF sleep 30 & echo $! ...
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How to find PID's user name in linux

Can you help me to find the PID's user name, Some time my server got high load. When i top -c, I cannot even find the PID's user name who / which is causing load on the server.
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235 views

Windows 7 PID consumes 50% CPU almost everyday for hours

I'm trying to determine why these services consume 50% of my CPU for hours at a time each day. I cannot restart the services without error and killing the PID just restarts it in a few minutes and ...
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4answers
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PID:4 using Port 80

I was trying to install Zend Server CE on my computer but when I got to the point were I need to choose the port for my Web Server it says: "Web Server Port: 80 Occupied". So I decided to check what ...
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2answers
133 views

Open file in Notepad++ as a tab without closing launched process

Some old tools are designed to work with an external text editor. I am stuck using a legacy tool that does this in the following way: Create a temporary file with the content to be edited. Launch ...
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4answers
9k views

How to kill one tab of google chrome using pid

I want to close one tab of chrome. I tried killing the pid of the tab, but the tab doesn't close instead says "Aw, Snap! Something went wrong while displaying this webpage. To continue, reload or go ...
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0answers
66 views

how do I get the PID list and USERNAME of each of those PIDs in LINUX using python?

I am trying to get the PID's and their respective usernames for displaying something similar to the top command in linux. I managed to get the list of PIDs but I am unable to fetch any username for ...
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2answers
5k views

Linux - alternative places where to store pid file instead of /var/run

As written in the title, where should I let the init script write the pid file? are there any standard paths I should choose instead of the /var/run ? Could /tmp be a good place where to store it or ...
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2answers
90 views

Kill all tasks with PID above a certain integer with bash

How may I fetch and kill all processes with a PID above e.g 1000? Using commands like ps -A and top is fine for viewing the list of processes, but how would one only get the PIDs? The logic of ...
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0answers
64 views

How do I figure out a root cause of a zombie process?

A process on a production linux server became a zombie with unknown reason. I wonder if there is a certain methodology to find out what causes it.
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Why is the highest PID 66435 when there are only 277 processes running? [duplicate]

On my OS X/Darwin system, the highest PID is 66435, but there are only 277 processes running. Doesn't this indicate the system is just counting up with PIDs? And, if so, doesn't that mean the system ...
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5answers
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PID number in Task Manager can't be found

i tried running netstat -o to check what are the connections which are established. I saw two and they have PID numbers. When I checked it in my Task Manager, I couldn't find those PID numbers. Is ...
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0answers
62 views

bash: monitoring which files are used by a process in real time

Is there any command to track what files are opened / closed / written by program with given PID in real time? I want to: run a program, enable program file operations monitoring, do some stuff in ...
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1answer
147 views

How do I determine the PID of my python program if there is more then one python program running?

I have two python programs running on my system, say they are called program x and program y. I want to get the pid of program y, but not x for my bash script. When using pgrep python, I get the pid ...
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Is it possible to see a snapshot of all the memory allocations made by a particular process in Linux?

The important data I want about these allocations is the function pointer value which did these mallocs. Otherwise I know of pmap and /proc/[pid]/maps. Both these techniques lack the function pointers ...
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Does Windows 7 reuse process IDs?

Does Windows 7 reuse process IDs? The reason I ask this question is due to my experience that Windows XP and Linux never seems to generate process IDs higher than 20–30k. However, my Windows 7 ...
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1answer
3k views

Restart process on linux by its pidn number with kill command, how?

Well, I want to be able to restart processes on linux and so I looked into kill manpages for that. Apparently kill -l would list all the signals I could send to a process to do what I need, which ...
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How to find process pid of an application

I have portable version of an app. I have ran for example 5 multiple instances of it and they all have the same process name but different pids. I want to find a way to for example kill one specific ...
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Excluding grep from process list

I have cobbled together a command to return the process ID of a running daemon: ps aux | grep daemon_name | awk "{ print \$2 }" It works perfectly and returns the PID, but it also returns a second ...
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348 views

How to find out who (what process) is starting another process?

So no matter how many times I kill exim4 it immediately comes back to life. I have stopped the service and everything but something is bringing it back to life and using it for spamming. How do I ...
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Get PID of process started in screen by su

i have a simple script that starts quassel-core in a screen session as different user! The script is: #!/bin/sh su ircc -c 'screen -dmS quassel /home/ircc/quassel/quassel-core' I want to start and ...
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51 views

PID of background task is different to the listed task PID using ps

Note: I h ave moved this to stack-overflow, I think that is the right place: here I have a strange issue, I can't quite get my head around. What I do is run a function called fn_rundumper which ...
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69 views

Process ID files missing from remote Ubuntu Linux PC?

I am running Ubuntu 12.0.4 LTS on a PC in my office and on a virtual machine hosted on Azure. For some reason, the remote PC is not creating a PID file for each process. Everything else seems to ...
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1answer
721 views

The server quit without updating PID file

I am trying to install MySQL on my Mac w/ Mavericks OS. Whenever I try sudo /usr/local/mysql/support-files/mysql.server start it shows an error The server quit without updating PID file ...
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How to view the calling script on Linux [closed]

I am trying to write a script to help with computer security. I am trying to look for open ports, find the PID, and find what called it. I have it working, where my output looks something like this: ...
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How to start a process with a predefined (in case it is unused) PID?

Is it possible to start/run a process with a predefined PID? In Linux or in OS X (or BSD)?
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Run a process and return its PID (as CHP.EXE) for a batch file

I'm looking for something like chp.exe, it can runs a command and returns its pid. I can not use CHP.EXE because it seems to be reported as infected file in some antiviruses. Thanks
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92 views

How to execute a script 20 at a time with different variables at a time in parallel?

I am trying to run 20 files at a time, using warc.sh or a better way to put it is 20 instances of warc.sh at a time with directory contents as the input. I am also trying to watch the PIDs in case bad ...
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1answer
226 views

Shell, subshell, source, background process, PID == confusion

I am trying to get my mind straight as to how all these things are put together. For example with this script: #!/bin/bash . script1 ./script2 . script3 & ./script4 & sleep 5 How do the ...
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299 views

How Windows/Linux assign PID to processes?

Q1 : I want to know how Windows/Linux assign a PID to a process when that process began? Is it a delimited random number? or it is fixed for a file on a compute? does it have a special algorithm? and ...
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Install perl module from rpm file

I have a perl issue and obviously I'm not a perl expert. I can not use CPAN. I've installed File::Pid using a rpm, or I tried. I downloaded perl-File-Pid-1.01-3.el5.noarch.rpm (and the ...
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1answer
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PID not shown under Services in the Task Manager on Windows 8

I'm trying to run a program that defaults to port 9000 but there is an unknown source using that port. I found the PID by using, netstat -aon | more and went to the task managers service tab ...
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548 views

Init process in linux

Who or Which process is the parent of INIT process? INIT is the first process which is initialized by the Kernel, kernel is not one process, So what is its parent process id value?
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144 views

Getting pid of process not listed in ps -ef

I know there is a process called blt.pl running on a particular machine but not quite sure which user is running it. i have tried ps -ef | grep -i blt.pl but obviously it's not finding it. Is there ...
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1answer
5k views

Where can I find my (current shell process') PID?

I'm on OS X using ZSH (have lots of homebrew stuff, too). I'd like to know the PID of my current terminal. (I'm learning more about process management on *nix systems, pstree and the like, and so ...
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1answer
639 views

Weird start-stop-daemon behaviour?

I have the following script: #!/usr/bin/python3 import sys for s in sys.argv: print(s) Now I execute: sudo start-stop-daemon --start --pidfile /var/run/test.pid --make-pidfile ...
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3k views

Squid Proxy process not running

Hey community, some days ago my squid crashed. I'm running squid 2.6 STABLE21 on CentOS. The output of the "show squid status" command is just squid dead but pid file exists starting the ...
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204 views

Red5 on Debian, output PID

I'm fumbling my way through with this one, as a novice with all things linux so please be patient :) I would like to output the process ID of a program to a file. From my readings this is generally ...
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What processes, if any, exist between PIDs 0 and 4 on Windows 7?

Just out of curiosity what are the processes between 0 and 4, and also between 4 and 200 something.
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Show PID of process just launched in ZSH

Can I show the PID of a process that I just launched, ideally at the end of the line of the command? Example: root in ~: mysqld .................. [PID 34567] 12121 mysql-logs start to come in... ...
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Is there a process with pid 0 linux? [duplicate]

Is there a process with pid 0 linux? Also is there any negative pids? This is just out of curiosity :D
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488 views

hide pid when a process is launched in background

So I put this command vncconfig -iconic &, this causes vncconfig window to launch and terminal will display like [1] 13488. I want to hide this pid info. That is, when we put the command, only ...