A process is an instance of a computer program that is being executed.

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How to monitor or kill a process which has been started by cron?

I have some bots, which are run by the System scheduler at given time interval. But sometimes due to some logical error I have to stop these bots manually. How can I find these processes run by the ...
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1answer
1k views

Kill child-parent processes in a single command

I connect to Internet using sudo wvdial on Fedora 14. The terminal needs to be kept working. My requirement is to run yum update in a separate terminal, then kill wvdial & its parent terminal and ...
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1answer
8 views

list processes running inside of screen (manager with with VT100/ANSI terminal emulation)

I have an application that during installation runs a bunch of processes via screen, so I can see those if attached to the screen, however I don't see those via "ps -ef" or "ps auxww". How can I list ...
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3answers
126 views

CPU and Memory usage monitoring for a single process

I need to monitor the CPU and Memory usage for a single process in an AIX server. The program runs 3 times a day. I need to find the way to capture statistics within some time intervals, lets say ...
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1answer
31 views

How do I find the resident memory size of a process on busybox?

I run top on busybox and it shows all processes and their virtual memory size. How do I determine how much RAM is being used by each process?
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Why do some processes pass on their cpu usage to another process when it ends?

I have wondered this for a while. For example, lets say process1 is a process that uses a lot of cpu power, like 90%. Its a video game. Then i have process2 which uses 10-12% cpu. Its a web browser. ...
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57 views

How to run the dialog command with proccess? [duplicate]

NOTE: Please look at my code, it's a Bash script. I want to display both dialogs on the screen at the same time, one dialog displays this: tail –f from - /var/log/proccess1.log and the second ...
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36 views

API Monitoring and Hooking

I am currently reading the "Malware Analyst's Cookbook and DVD". There is a chapter "Dynamic Analysis" and there are also some recipes about hooking and monitoring API calls of process but it is for ...
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2answers
95 views

cpulimit does not detect Node.JS process

I was able to limit python process to use only 50% CPU with the following cpulimit -l 50 -e python but when I tried to do the same for Node, and it is not able to detect the process at all. Does ...
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1answer
1k views

I can't install new packages and can't update and upgrade

I'm trying to install some program on Ubuntu, but when I try it I got the following error.- E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock ...
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43 views

Why are the process priorities not respected?

I was running four jobs in the background with HTCondor. It sets the priority to 10. Then I was compiling something with make -j4 in the foreground (priority 0). However, the HTCondor jobs still got ...
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56 views

Cgroups - memory subsystem

I want to set the memory.limit_in_bytes parameter for a control group and disable OOM, so processes freeze when the limit is reached. But i want to change that limit dynamically, if there is more ...
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51 views

CGroup Processes Not Terminated even when main process has been killed through Systemctl stop command

I am running systemctl stop process command for some process. Please find the output for systemctl status process below: Loaded: loaded Active: deactivating (stop-sigterm) CGroup: ...
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59 views

Getting non-stored password from Icedove

I've recently changed my mail password (because of Heartbleed), but I've forgotten the new one. When entering the new password in Icedove, I didn't think of clicking "remember password", but the ...
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671 views

How is it that I can attach strace to a process that isn't in the output of ps?

I'm trying to debug why our integration tests are taking so long and it looks like they're hanging part way through. I logged onto our test service and saw the following behaviour: root@colossus:~# ...
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1answer
223 views

rkhunter /usr/bin/ssh && /usr/sbin/sshd [Warning]

My last rkhuter scan reported a couple of warnings that deserve to be checked(for my noob eyes). Main reason for my suspect is that i wasn't on the machine at (03-Apr-2014 01:12:12) ->AM I googled ...
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1answer
2k views

What is the difference in CPU utilization between 'ps aux' and 'ps -ef'?

I use Ubuntu 12.04.1 Linux. I see a difference between %CPU and C output format of ps command for a process. It is not clearly noted in the ps man page. Man pages says: CODE HEADER ...
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1answer
203 views

How to move process from one namespace to other?

This question is similar to my question about how to list namespaces. So in addtition, I'd like to know some information about moving processes from one namespace to other? E.g. I have processes of ...
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1answer
686 views

How to get start time for a defunct process on AIX?

When I run the following commands on AIX: 22:root@SERVER:/root # ps -ef | head -1 UID PID PPID C STIME TTY TIME CMD 22:root@SERVER:/root # ps -ef | grep defunct | head -1 ...
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1answer
311 views

accessing stdin/stdout of a process started in another tty

I logged in to my linux physically(say tty1) and started a process that watches stdin for commands and has some stdout-put. How can I access/use this process from a SSH session?
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1answer
182 views

Why is a user started process running when not logged in?

Following a tutorial on setting up gnupg to manage ssh keys I've managed to get several instances of gpg-agent running: [root@frylock ~]# ps aux | grep agent root 2764 0.0 0.0 4208 432 ? ...
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how to stop kernel threads preempting real time user space processes?

I created some processes in user space and tried to visualize its working in kernelshark with the trace recorded using trace-cmd. But kernel processes like the ones shown below are preempting my ...
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Linux child processes not being culled [closed]

This is causing significant problems for script portability between BSD and Linux. I am on a CentOS 6.4 where this happens. I have a nice compact test case: bash -c "inotifywait -mcr . | sed ...
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1answer
268 views

Can I transfer running process from dead ssh [duplicate]

Possible Duplicate: How can I disown a running process and associate it to a new screen shell? I have started (as expected) a long copy process from ssh shell (putty) which died due to ...
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127 views

How to find current chroot jail path on Linux <2.6.26

While running kernel 2.6.26 or newer it's possible to get the path of the current chroot jail by comparing the mountinfo of the current process and the init process. Is there a way to get the same ...
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1answer
173 views

How can I log what software I use the most?

I really like using open source software and would like to help fund further development. Unfortunately, I have limited funds to do so. Being somewhat greedy, I would like to donate to the projects I ...
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1answer
380 views

How to log processes in daemon-mode?

I would like to save the standard output of the program motion in a text file. If I don't use motion in daemon-mode I would simply do it by: motion > log.txt But what is the equivalent when I ...
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8k views

Kill all process of users in Ubuntu?

How to kill all process of one user? When I make ps aux I obtain a list of process with several users, and I want to kill all process of user name1 for example! What's a command to do that in Ubuntu? ...
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3answers
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What is the difference between ps and top command?

What is the difference between ps and top command ? I see that both can display information about running processes . Which one should be used when ?
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2answers
529 views

Why does my one instance of VLC have many processes?

As you can see from the image below (htop), I have several vlc processes running, all with only the command vlc. However, I'm only running one vlc instance. What are the other instances? Would it ...
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2answers
561 views

How can I disable /proc pseudo-filesystem on a shared Linux environment?

Is it possible to disable the /proc pseudo-filesystem to prevent w, ps, top, etc, from showing what other users are doing? Of course, I still want "everything else" to work correctly. Is there a ...
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How to get the Job ID? [duplicate]

As we know, the shell enables the user to run background processes using & at the command line's end. Each background process is identified by a job ID and, of course, by it's PID. When I'm ...
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What does d signify in processes like syslogd and httpd?

Why there is a "d" after the name of processes like syslogd and httpd ? What is its significance ?
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Why is apache2 showing up a defunct in the process list?

When I run top I see one line that doesn't look too good: 2475 www-data 20 0 0 0 0 Z 1 0.0 0:00.19 apache2 <defunct> Why is this process <defunct> and what should I ...
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1answer
618 views

How to preload my .so everytime an application executes?

I've successfully used a hook under linux with this article: http://hackerboss.com/overriding-system-functions-for-fun-and-profit/ Now I want to make my .so file load every time espeak loads up. No ...
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1answer
92 views

Command to list in real time all the actions of a process

I cannot remember this command (and googling was unsuccessful), but there is a way to get the list of actions performed by a process, that outputs something like # listprocessactions -p 1234 ...
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1answer
1k views

Is it possible to get process group ID from /proc?

In "http://stackoverflow.com/questions/13038143/how-to-get-pids-in-one-process-group-in-linux-os" I see all answers mentioning ps and none mentioning /proc. "ps" seems to be not very portable ...
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3answers
188 views

How do I start a server via ssh and have it run after I log out?

I ssh into a virtual server and start up a web server. Everything runs as expected. But when I close my terminal on my laptop, the process dies on the virtual server. How do I fix this?
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Why teamviewer starts again after being killed

My main desktop has Mint 14 and I approached it via SSH from another computer, because I didn't have a screen on the Mint one. Then I tried to start teamviewer just I order to launch its desktop ...
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1answer
235 views

How to kill all processes that don't have specific parent process?

A parent process should always be running with N children process. I would like to run a script which will show/kill all children processes that don't have a parent process. $ ps faux | grep ...
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1answer
1k views

How to kill the (last - 1) PID with bash

I know how to kill the last process with kill $! However I would like to kill the last−1 process, i.e. not the last one, but the one before the last one. I tried kill $$(($! -1)) but ...
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114 views

What is the lowest level I can see my system running?

Let me try and clarify. Is there any way for me to see very very low level activity on my computer? Stuff like: register content opcodes being sent specific memory addresses Or anything lower ...
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2answers
22 views

using sudo create another process

I have wrote a shell script names testShell.I run this shell using command: sudo sh testShell Then I use ps -ef|grep testShell|grep -v grep to check the processes created.I find that system ...
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1answer
110 views

How to kill - softly? [duplicate]

If I want to kill a process as careful and politely as possible, which signals should I use in a kill command, in which order? I would like to give the programm any kind of time to clean up, if it ...
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4answers
132 views

How to set the process won't be terminated when the terminal stops

[Edit] Make it simple. I invoked java xxx... on Machine A using putty to connect from Machine B. However I cannot reach Machine B. How can I connect Machine A from Machine C to set the running ...
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How to limit the number of process that a user can create?

I think I have a program that creates countless forks of itself (not intentionally, I hope). I like to test this but I can't kill the machine, so how could I limit the number of process to execute ...
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305 views

Detect process if not found then run it

I am running several process at startup using "crontab -e" @reboot tranmission-daemon && python defualt.py && python MonitorService.py But for some reason, those service can ...
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process id and killing process - ps commmand

Please see the output of below ps command: abc@smaug:~/Desktop$ ps ax | grep firefox 2213 ? Sl 2:01 /usr/lib/firefox/firefox 2644 pts/0 S+ 0:00 grep --color=auto firefox Please ...
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118 views

How to know if a specific program is open

Using a command line in terminal, I want to be displayed 1 if a program (for example Firefox or Chromium) is open and 0 otherwise. Edit: By "open", I mean "is running on the current machine and has a ...
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1k views

multiple background processes in a script

Suppose if i have a situation in which some files need to be copied and it takes long time so i would have to go for parallel processing of the file copy. for example it may look like this for i in ...