General :: Why Do Process IDs Come In Tens Of Thousands
Sep 12, 2011
Whenever you write a program that prints its own process ID, I've always (without any exception) received numbers ranging in the tens of thousands. Never less, never higher. I was just wondering, why is are the process ID #s so high? Are the ones below it all system-related processes? And then when I run the program again, it prints out an ID that is several hundred above the previous execution... what happens between these two executions that come right after each other?
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Sep 3, 2010
I got myself a .bashrc file off the net. I checked it beforehand, didn't detect anything bad about it. One thing that's odd about it, is that several spaces are added to the terminal command line.Screenshot:Those spaces are not put there by me. The file can be found here: [URL]..
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May 25, 2011
Our client has a website (Joomla 1.5 based) to promote participation in and report results of a 10k race for runners in Scandinavia...
The race is scheduled for late June and will be covered by at least 5 still photographers at various points along the race course.
There are to be about 5,000 runners, each entered under a shirt number like bib_1000 through bib_5999, and this means there will be a significant number of digital jpg files submitted by the photographers...
The client has in place some software which will "automagically" resize, watermark, and rename the individual files in the form:
And so on with a possibility of as many as 10 or 12 images in the aggregate with the same alpha-numeric "shirt number" at the beginning of the filename.
Our presentation software does a great job of handling thumbnail image generation and displaying a slideshow in a lightbox of all files within a given folder on the webserver.
And now finally the question...
Given a folder containing 25,000 or so *.jpg files, how can we write a script that:
1. parses the filenames to unique "shirt numbers"
2. makes folders with each "shirt number" as the foldername
3. moves the files from the root of the original folder into the appropriate "shirt number" folder.
Note that the order of my list above is not important, and if you know of a better way to organize the task we are fine with that.
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Feb 13, 2010
I'm backing up my data asap. However, I am getting hundreds, maybe thousands of disk I/O errors when trying to run everyday programs, such as sqlite and firefox. Looking at dmesg, I see these items repeated many, many times:
[Code]....
[ 5196.943225] Valid eCryptfs headers not found in file header region or xattr region [ 5196.943232] Either the lower file is not in a valid eCryptfs format, or the key could not be retrieved. Plaintext passthrough mode is not enabled; returning -EIO
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Sep 18, 2010
I am newbie in Linux using Mint 9 Isadora. I am flooded with UFW messages. I would like to how to interpret these messages. I am a bit scared..
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Jul 3, 2010
Ubuntu 10.04 LTS, Gnome. gcalctool Function "Show thousands separator" doesn't actually show thousands separator. Why? Can I fix it?
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Jan 8, 2010
one tell me the internal working of kill command. that is how it kills a process internally or from where it picks file to continue its process.
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Jan 21, 2011
I have a high priority service that I start with sudo nice -n -10 process. This process does not need superuser rights though, except for the priority elevation. But nice requires superuser privileges to elevate priority.
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Jun 12, 2010
send the details raid configuration how to use in linux el5 and how to indentify the raid degrade process and how to rebuilt the process.
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Sep 8, 2010
Code:
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
[code]....
Description of what the code does or what i intended to do:
1. Created a child process from parent process using 'fork()'
2. Sent a signal 'SIGALRM' from child process to parent process using 'sigqueue' function.
(The Third parameter of 'siqueue' function contains the message (message msg) which the child process wants to send to the parent process.'msg' is a stucture instance containing a) pid of child and b) string) 5. Print the 'msg' sent by child process inside the signal handler function 'sig_action_function' of the parent process I am getting some junk value when this line is executed
Code:
printf("%d
",msg->cpid);
I expected to get the pid of child process, which the child process sent to parent process through the signal.
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Aug 12, 2010
as we all know Process Scheduler does Process scheduling and its a process as well. I was just wondering that if this happens then the Process "Process Scheduler" should be a part of Process queue as well.
So if there are 5 process are there in Process queue & process scheduler is administrating them then since its also a process, once it puts a process under RUN state it should itself go inside queue because at one instant only one process can get executed on a processor. This is quite confusing for me. Please help me out. I tried to search on this but could not find any relevant topics.
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May 4, 2010
How do you find the parent process of zombie processes?
When the child process is something where the parent is not entirely obvious...
Is there some way to list processes in tree format or something?
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Nov 9, 2010
I have a process running on Linux.When i do ps -eaf | grep <myProcess>, it show muliple entries for <myProcess> with different pids for each entry.Kindly tell me what could be the reason for a process having multiple pids?
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Mar 23, 2010
I want ro ran new commandy after sungrid finish his task.Exp:qsub -q bla command1; command2 command2 start only when job of command1 finished.
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Nov 16, 2010
I've been running my shellscript for about half an hour now. It's taking longer than I thought to process all the data. I have the process ID of it. Is it possible to save the process and log out then log in and continue the process? I know how to pause a process using kill -pause pID and continue it using kill -cont pID. But that only work if you don't log out after pausing it.
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Mar 11, 2011
I've got an older graphics card I'm trying to use. It actually runs fine through the bios and even works when fedora is loading. But once fedora finishes loading half the screen turns into thousands of multicolored horizontal lines.
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Dec 2, 2010
if i run chromium with --enable-gpu-rendering flag chromium's display looks like it's shattered into thousands of pieces and I can't understand a thing. This doesn't happens if I have a previous instance of chromium opened in the usual way, without any flag. In this case if I open another chromium window with the --enable-gpu-rendering flag it's display looks ok, but I can't figure out what's the problem and how could this be fixed if there's solution for it of course.
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Mar 10, 2011
I want to kill parent process after "fork()" method. but if I kill parent process with "exit(0)" method, main() thread is terminated as well so child prosess doesn't work anymore. Is there any way to kill only parent process without affecting to child process?
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
[code]....
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Nov 11, 2010
I've some file with .sh extensions that runs some softwares.Now,how do I stop running that filesI know we run the command ./start_tomcat.sh to start the apache.Is there any command to stop that file/process or is it just kill the process to stop the process
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Sep 17, 2010
I need a command to get the process name by process id.
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Nov 9, 2010
I have a shell script to identify whether the process is running or not. If the process is not running, then I execute another script file to run my application. Below is my script and saved this script as monitorprocess.sh Code: #!/bin/bash
result=$(ps -ef | grep -v grep | grep "applicationname.sh" | awk '{print $2}')
echo $result
if [ "$result" == "" ];
[code]...
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Mar 31, 2011
Is there any difference in cpu usage for process in init.rc(runs automatic when boot is happened) and manually running process. Will these both have same priority by default...?
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Nov 26, 2008
I tried googling but didn't get any answer for this.I have a process called "abc" and it is running with PID "123".I have a putty session opened with PID "999".I am giving kill -TERM 123 from putty session.My process "abc" before dying it should catch the PID of the terminal which provided TERM signal to it.Is there any way to find this out
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Oct 12, 2010
My Ubuntu system is occasionally becoming very sluggish. I'm running many things simultaneously and it's very difficult to tell which program is the culprit.
I suspect that the sluggishness is due to disk activity since the CPU usage is consistently under 50% on each of the 4 cores of the CPU, and over 30% of the 6GB of RAM are free.
Is there a tool that can show me in real time the number of disk IO operations per second and the amount of data read/written per second? Can all this info be broken down and displayed per process?
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Nov 9, 2010
I have a shell script to identify whether the process is running or not. If the process is not running, then I execute another script file to run my application. Below is my script and saved this script as monitorprocess.sh
Code:
#!/bin/bash
result=$(ps -ef | grep -v grep | grep "applicationname.sh" | awk '{print $2}')
[code]...
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Dec 21, 2010
Given the pid of a process that's running on a x64 linux, how do I tell if it's running a 32 or 64 bit binary? I can look at the binary it's running out of 'ps' and do a file on that but I was wondering if there's a way to tell by looking at /proc/ or something like that.
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Mar 24, 2011
I wish to pin a process to a CPU1 in my dual CPU machine - how can I do it in Linux - any pointers ?
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Jun 25, 2011
I am developing a node application and there is an option to set the process title (process name). This only sets it in some tools (like ps and top), but not in htop or netstat.
I found this article that explained how most applications do it, but it doesn't change in netstat.
That lead me to wonder where those programs are getting the process name. Would they be getting it from /proc/##/cmdline? (## being the PID of the process)
I figure messing with things in /proc is a bad idea (and probably not possible), so if this is where those programs are getting it, is there a way to change it?
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Jun 21, 2010
From previous post I have a netbook from work that I have Debian Squeeze running on and did a full disk encryption (minus the minimal boot loader in /boot) in case it gets stolen. However, with a laptop/netbook it has a battery and I believe the encryption protocol (LUKS - correct me if I'm wrong) uses RAM to store the decrypt key. So if someone is quick they can dump RAM and analyze it until they get the key. Or even if the key is not stored there they could dump RAM which would have recent files cached unecrypted.
Is there an easy process of encrypting RAM while still using as RAM? What I mean by that is I know you could make a ramdisk sort of like how Live CDs do and encrypt that, but at best (that I know of) I can only mount it as swap space.
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Oct 26, 2010
i have ported linux into arm and i want to run two background process on target
i have two c programs a.c and b.c
i have cross compiled them as
arm-linux-gcc -o a a.c
[code]...
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