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0
votes
1answer
19 views

Start Docker container and open web browser on host

I recently faced one non-trivial (for me) case. Maybe you know any way to solve it. I have a shell script that runs Docker command to start the Ubuntu container, which ends up with running guest Bash ...
-1
votes
0answers
19 views

Monitor Script for a specific oracle process which pegs my CPU to 100 % [on hold]

I need a shell script on AIX which can monitor a specific oracle process "ora_e00", this process is often pegging my CPU 100%, so I need to be notified by mail before killing it.
1
vote
1answer
35 views

How can I run a process in one terminal from another terminal

I have 5 processes running from one terminal (T1). All of them are running in background, but generate a lot of output. Now from other terminal (T2), I want to kill one of them using KILL pid command....
2
votes
2answers
64 views

How to check and run a script if it's not running?

I created a pretty simple script called main_start_script that will run 2 python programs in background, code is: python /opt/cuckoo/cuckoo-2/cuckoo.py 1>cuckoo_script/cuckoo_start.txt 2>&1 ...
9
votes
3answers
911 views

How to kill multiple processes

to find the PID of the process to kill use : pgrep <process command> I then use the kill command to kill the PID returned by pgrep <process command> kill <PID> Can these ...
13
votes
2answers
456 views

How should I check whether a given PID is running?

I'm writing a Perl script that parses logfiles to collect PIDs and then checks whether that PID is running. I am trying to think of the best way to make that check. Obviously, I could do something ...
1
vote
0answers
26 views

How to manage users' orphaned processes?

I have a service that executes users' scripts which in turn spawn more processes. Some of those processes stop on external conditions that might not take place. Since the the parent is gone (e.g. may ...
0
votes
1answer
130 views

Need script to kill python process with low CPU usage

I've created a very large and complex python program and I now know it has a serious bug that I'm having a very hard time pinning down. I'm using this code in a production environment so I need a stop-...
4
votes
4answers
16k views

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 ?
0
votes
1answer
31 views

Limit the number of mod_mono_server4 process instances to match the number of Apache server processes started up at Ubuntu 16.04 reboot timee?

How do I limit the number of mod_mono_service process instances to match the number of Apache server processes started up at Ubuntu 16.04 reboot time? The way to specify the number of Apache server ...
8
votes
5answers
9k views

'kill java' doesn't kill java

I am running debian right now and sometimes I need to kill java manually from the terminal, but when I try kill #pid# or pkill java nothing happens. No console output (ok, that's normal) and java is ...
4
votes
3answers
108 views

Get chrome's total memory usage

Since google chrome/chromium spawn multiple processes it's harder to see how much total memory these processes use in total. Is there an easy way to see how much total memory a series of connected ...
316
votes
10answers
123k views

When should I not kill -9 a process?

I am always very hesitant to run kill -9, but I see other admins do it almost routinely. I figure there is probably a sensible middle ground, so: When and why should kill -9 be used? When and why ...
2
votes
1answer
14 views

Pthread scheduler scope variables?

I read that their is 1:1 mapping of user and kernel thread in linux What is the difference between PTHREAD_SCOPE_PROCESS & PTHREAD_SCOPE_SYSTEM in linux if kernel is considering every thread ...
8
votes
3answers
97k views

How can I see what processes are running?

I use Ubuntu Server 10.10 and I would like to see what processes are running. I know that PostgreSQL is running on my machine but I can not see it with the top or ps commands, so I assume that they ...
2
votes
0answers
27 views

unicorn + systemd: losing logging after unicorn upgrade

I'm deploying unicorn with systemd for the first time (actually, this is the first time I'm using systemd at all), and I'm using unicorn's "zero-downtime upgrade" trick, or basically: Send USR2 to ...
1
vote
2answers
183 views

One-Liner needed: Stop httpd if running already & Start httpd if not running

As part of a provisioning script for CentOS 7 I am in need to have a one-liner that performs the following. Unfortunately, I have no clue how to achieve that. If httpd is running then stop it If ...
1
vote
1answer
104 views

Systemcrash suexec forkbomb.sh ulimits

I got this script named fork.sh: #!/bin/sh forkbomb() { forkbomb | forkbomb & } ; forkbomb If I call it through suexec my whole system will consume 99% cpu. To prevent a normal bash forkbomb I ...
2
votes
1answer
26 views

Why do processes not fill up empty process IDs

Everybody knows that PID number 1 is systemd (or something equivalent). And every process after that takes another PID, counting up. However when there are 50 processes running (up to PID 50) and ...
1
vote
2answers
82 views

Is there a program like tmux or screen but only for attaching or detaching a session

I was wondering if there was a program like GNU/screen or tmux that would allow me to attach or detach a session with a running process but would not provide all of the other features such as windows ...
1
vote
1answer
37 views

pgrep full match not work, only part, why?

I use pgrep from procps-3.3.10. If I have executable aout_abcdefgh_ver27, then pgrep aout_abcdefgh_ver27 returns nothing, while ps aux | grep aout_abcdefgh_ver27 returns the expected result: ps ...
-3
votes
1answer
70 views

What is the difference between nice and renice?

What is the difference between the two commands nice and renice to manage process priority?
1
vote
2answers
135 views

Terminal command (called not from SU) that would restrict process from writing to all directories but one?

We have an app testApp. We have a folder called notRestricted in the directory where we run app from. We want to limit access of the app to file system so that app could write only to that folder (we ...
0
votes
0answers
989 views

Detach a process from Sh (not Bash) or “disown” for Sh (not Bash)

Consider a shell script executed by Sh, not Bash (and I can't change it, and can't use a shebang, it's ignored). The & operator works, but disown $! does not and makes Sh complains “disown: not ...
18
votes
1answer
29k views

What does this process STAT indicates?

If you check the STAT column in above image you will see Ss S S< SN and R+ What does this indicates ? Process states. If yes,Then what is the significance of 'Ss S< SN and R+'?
5
votes
4answers
1k views

A gzip process regularly runs on my system, how do I figure out what is triggering it?

For a while now, I have had the problem that a gzip process randomly starts on my Kubuntu system, uses up quite a bit of resources and causes my notebook fan to go crazy. The process shows up as gzip -...
5
votes
1answer
1k views

A script's background process is still alive after closing the terminal

This is more of a process management/signal handling question than a Bash question. It just uses Bash to explain the issue. I'm running a Bash script in which I run a background process. This is the ...
1
vote
2answers
52 views

List superuser processes

I am trying to list the superusers processes currently running in my Kali distro. Using "pgrep -f sbin" I figured that would do the trick, however it only lists the PID numbers, not the actual name of ...
1
vote
2answers
1k views

How can I wake a process from sleep status via signal or /proc?

Many years ago I had an issue with Linux where processes would randomly go to sleep. Back then, I knew a trick with the /proc filesystem to trigger a wakeup of the process. I vaguely remember being ...
31
votes
1answer
1k views

What is a “subreaper” process?

The word "subreaper" is used in some answers. Searching Google also turn up entries where the word is "just used". How can I understand what a "subreaper" is?
20
votes
2answers
416 views

Can a zombie have orphans? Will the orphan children be disturbed by reaping the zombie?

As I understand it, a zombie process has died but still exists as a placeholder in the process table until its parent (or init if the zombie is itself an orphan) checks its exit status. And my ...
16
votes
3answers
16k views

How to Throttle per process I/O to a max limit?

I'm looking for a way to limit a processes disk io to a set speed limit. Ideally the program would work similar to this: $ limitio --pid 32423 --write-limit 1M Limiting process 32423 to 1 megabyte ...
2
votes
2answers
128 views

How to get the title of the media playing in VLC or other media players using CLI?

I want to get the title of the media playing in VLC using the Command Line. The closest thing I currently have is this command. ps aux | grep vlc The output is pc 27636 2.1 2.3 1261964 ...
2
votes
2answers
94 views

How to kill line of PID?

I have process which created multiple PID's. I want to kill all those PID's. I have tried pkill <process_name>. But PID not getting killed as they were wait to resource releasing. I have ...
3
votes
3answers
4k views

How to find how many cores a process is using?

I have a eight core machine. How can I find out how many cores are used by processes that I see in htop?
4
votes
3answers
151 views

How to show quoted command list?

ps -o command shows each command on a separate line, with space separated, unquoted arguments: $ ps -o command COMMAND bash ps -o command This can be a problem when checking whether the quoting was ...
1
vote
2answers
246 views

Get process age from command line [duplicate]

In linux, from /proc/PID/stat, I can get the start_time (22:nd) field, which indicates how long after the kernel booted the process was started. What is a good way to convert that to a seconds-since-...
1
vote
1answer
83 views

Signal execution details

I am reading some Linux documentation about 'signals' and I still have these questions making noise in my mind: 1) A 'signal' handler execution is done when the 'target' process receives its ...
0
votes
1answer
132 views

Process management - add daemon process from CLI

I'm looking for process manager which can be controlled from CLI (add, start, stop, delete), so I can control it programmatically. I've tried using https://github.com/circus-tent/circus, but the ...
3
votes
2answers
100 views

What information about a process is retrievable after it is terminated?

After a process has been terminated, is it possible to retrieve any information about it, such as when it started and finished, &c. Is it possible to enable logging of this information?
0
votes
2answers
95 views

Opened file with several million lines: how to close it?

I've just accidentally opened rockyou.txt in Kali Linux on a fairly slow computer. It has now been sitting on the desktop loading the 30million words for over an hour. It is not frozen, as I can still ...
1
vote
0answers
104 views

Check whether a process is running in privileged mode

I want to check if a specific process is running in privileged mode. If a process is running is privileged mode, necessarily the user running it is going to be root? I've noticed that when I use sudo,...
1
vote
1answer
54 views

Which process group does my program belong to when started from bash?

If I run a program from bash, then does my program belong to the same process group as the shell, or does it belong to a new process group? As I am making a shell in C, I need to handle the SIGINT ...
7
votes
4answers
19k views
4
votes
2answers
1k views

Removing zombie process from the process table

Can somebody please explain when parent process receives the exit status of a dead child process via wait, who actually reallocates the memory of the child process and removes it from the process ...
1
vote
3answers
140 views
1
vote
1answer
64 views

Kill process instead of panic on hung_task

There are sysctl parameters for hung_task* that allow you to emit error messages or panic if a process is in the D state for some amount of time. Is there anyway way to have the kernel kill the ...
2
votes
2answers
203 views

Why do multiple instances of Mate-terminal have the same PID?

I've noticed, that all mate-terminal instances I start, be it inside a mate-terminal or via a link button, have the same PID. For example, I got something like $ wmctrl -lp <omitted lines that ...
6
votes
1answer
460 views

Difference between closing the terminal using the closing button, and Ctrl-D

When I'm launching a background process and then closes the terminal using the window's closing button, the background process gets killed. However if I close the terminal using Ctrl+D, the background ...
0
votes
2answers
54 views

Which tool can be used to configure the CPU priority of a process?

I know that you can use nice to re assign priorities of processes but which tool can be used to configure the CPU priority of a process ?