Questions tagged [process]
Questions about identifying processes, about listing them, sending signals, killing them, assigning and using process priorities.
781
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23
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a process started with sudo and put in background still exist after ssh disconnect
Here is the procedure I use:
I'm connecting to Ubuntu 22.04 using ssh.
I'm editing a file with vim (or emacs) using sudo
I'm leaving the editor with Ctrl-Z
Then, I close the ssh connection. Either I ...
- 101
3
votes
1
answer
133
views
alias must be in the Bash sub process
How alias in Bash can be in the forked sub process Bash as get failed on:
alias al='echo hello '
$ al foobar
hello foobar
$ alias al='echo hello ' ; bash
$ al
bash: al: command not found
How to have ...
- 153
1
vote
1
answer
803
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Firefox: "isolate+" process CPU usage 100%
I have a completely new Ubuntu install with firefox. When browsing on my usual sites, I get over 100% CPU usage due to the process "isolate+". Google has been completely useless. I have ...
- 19
0
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1
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53
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Killing multiple processes by name [duplicate]
I have a question regarding killing processes that are running (and that I have started)
I have started many procesess and now I want to terminate them
doing
ps aux | grep aword
gives me the ...
- 402
0
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0
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67
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`ps` reports itself as using 99% CPU
After update to Ubuntu 23.04, I noticed that the ps command sometimes reports itself as using 99% CPU.
If you try several times, you will see something like:
$ ps -ef | grep \ p[s]
my_user 48167 ...
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0
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40
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Memory intensive process getting killed before swap memory is full
I have a very memory intensive Java program to run, at first it was giving heap out of memory error so I kept in increasing the heap size along with the swap partition (I only have 32 GBs of RAM and I ...
- 101
-3
votes
1
answer
65
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Why sum of all process CPU(%) is greater than total cpu(%) utilisation in top command [duplicate]
In a top command instance, the CPU utilisation (100-idle) was 14% but the top most process "Chrome" alone consumes 253%. I am unsure of how the chrome process consumes CPU more than 100%.
...
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1
answer
63
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is possible to execute commands on host from snap package?
I am building snap from command line program to guess linux commands from natural language. For example cal for show calendar. When command is proposed I need to confirm them by Enter. So after Enter ...
- 367
15
votes
5
answers
2k
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Check memory usage of process which exits immediately
I have built an application which takes less than 1 sec to execute. I want to check the memory usage of this application. What are the tools which can be used in this scenario?
- 303
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76
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Processes from distributed GPU usage are hanging and can't be killed
I was using the PyTorch library's data distributed parallel library in order to use multiple GPU devices when running my machine learning program.
After running, I noticed that three processes were ...
- 183
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0
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25
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USB device being accessed by two processes with same name
I have a USB serial device and I am working using someone's code. Does the output below indicates a single process or two processes accessing the same USB device?
pi2@rpi2:~ $ sudo lsof | grep /dev/...
- 129
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24
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Run interactive program from ssh then disconnect and reconnect [duplicate]
From my laptop I'd need to start a ssh terminal to a remote desktop in which I'll run a long running program testdisk or photorec, then once I setup my selections start the data recovery. Then I'd ...
- 1,724
2
votes
1
answer
130
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Two startup daemon processes working together in wsl2?
We normally know that WSL2 normally do not have systemd it generally starts on init daemon! But recently from year 2022 we can also use systemd by enabling the sysboot to systemd in wsl.config.
So I ...
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0
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44
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Should systemd be running as a sub-process of itself?
I just noticed in System Monitor that systemd is running as pid 1 AND that within that process it is listed as a dependent process of itself, running again under process 1 as pid 933 and with another ...
4
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1
answer
448
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How can I correctly calculate the sum of memory used by all processes?
There recently was a couple of questions asking why Ubuntu is seemingly using more memory than accounted for by processes/services - here and here.
However, I have the exact opposite situation. On my ...
- 19.1k
2
votes
1
answer
219
views
Oneliner to get the command which started a process on a certain port
I would need a one-line command which, given a port number, returns information on the command which started the process running on that port.
Usually, I get this information by running a sudo netstat
...
- 227
0
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0
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39
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Close only one window of a hanging program
I've had two separate windows of gedit. In one of them I've tried to open some file and this has made gedit hang giving me the typical choice of "Force quit" or "Wait". Continuous ...
- 101
0
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1
answer
83
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Efficiently get PID's in certain ports from java
I know sudo lsof -t -i:{port} will give the list of PID's involved in that port and I can run this command via java by Runtime.getRuntime.exec() command. But the thing is I have thousands of thread ...
- 153
1
vote
1
answer
514
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Finding out specific processes that are running php commands shown in 'top -i'
I have been scouring the forums to find the next step in analysing what process specifically is requesting the usage of a php command shown when running the top -i in an Ubuntu 20.04 server cli.
After ...
- 131
1
vote
1
answer
288
views
Wait for process with name to spawn in Bash
I want to write a Bash script that runs in a background, waiting for a command to spawn.
Suppose I ran script.sh which waits for ls. After I run ls, it should trigger actions?
- 82
0
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1
answer
160
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Multiple Un-killable Looping Processes Spawning
I'm desperately trying to work this one out, so thanks for taking a look.
Context:
Whilst trying to make a large file transfer from my Ubuntu PC to an external hard-drive, using rsync I believe, I ...
- 1
0
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0
answers
586
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How to config gnome-shell to run on GPU instead CPU?
This week I formatted my laptop and installed the new Ubuntu 22.04 (I was using 20.04), and after switching the OS, I found it slower than it was in 20.04 and I also, I found a lot of problems in this ...
1
vote
1
answer
83
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Allowing {USER} to run a command against a process owned by another user
I have been scouring the forums to find out how you can allow a command / process to be ran by a user that is normally only permitted by root or itself.
There are some good resources out there but ...
- 131
0
votes
1
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53
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Execute a command before hibernation ubuntu on lid close
I am wondering if there is a way to execute a script (for example I want the script to close all brave and node process), but I have already configured Ubuntu to hibernate on lid close, is there a way ...
0
votes
0
answers
87
views
sudo <command> & disown mess stty settings?
running in a script:
sudo gedit & disown; #or
sudo thunar & disown
or any process that opens up a process in the background randomly causes stty settings to all change and things become ...
- 61
-1
votes
1
answer
288
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Can't run mysqld in Ubuntu
I try to run mysqld but i get following error in Ubuntu terminal.
2022-08-30T18:48:34.596763Z 0 [Warning] [MY-010091] [Server] Can't create test file /var/lib/mysql/...
- 1
1
vote
1
answer
216
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process stops, see "killed" in temrinal window
I have 20.04 LTS and was running yolov5 model as root ( to rule out permissins issues ) and the model starts fine, then the first epoch of training starts, nothing happens, then I see the word "...
- 121
0
votes
1
answer
149
views
Process exits on terminal session end, even though it's a background process
I connect to my VPS using ssh. I run npm run start & to start my next.js site in the background. And everything works.
As soon as I disconnect my SSH session, my site stops.
How can I force that ...
- 109
0
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0
answers
81
views
How to check reason for a process getting killed in Ubuntu 22.04?
I have a process that gets killed, but no error message is shown in the terminal, while I run it. Is there a way to see some message, or get that information?
I've tried running syslog like it said in ...
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0
answers
105
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Ubuntu is very slow, due to these processes or other issues?
TIME+ COMMAND
------------------
73:39.09 gnome-shell
6:39.58 kswapd0
7:20.54 kcompactd0
46:26.92 Xorg ...
0
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0
answers
112
views
root directory out of space - syslog and logdna-agent log files are filled with unknown error messages
The alerts in the log channel popped up saying root filesystem is running out of space and no write operations can be performed. On inspection using ncdu found that the /var/log folder was taking a ...
- 1
0
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1
answer
222
views
Why this orphaned process is called by a child process of init instead of init?
I know that all orphaned process are taken over by the init process(mother process) but I wrote a c program to understand how processes really work and I notice that a orphaned process is taken over ...
1
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0
answers
67
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Unknown process overloading cpu - kperl
I am not a Linux expert.
I noted a process running on my Ubuntu that is taking 200% of the cpu resources.
It is belong to root, its name is kperl and is located in /temp
I have not been able to ...
- 111
1
vote
1
answer
424
views
Forground a running process that was started with a script (MineCraft Server)
I have a MineCraft server starting with a script in chrontab. When I start my Ubuntu 20.04 LTS Computer, and I SSH to the server, I want, for example, to add someone in the whitelist, but I need to ...
- 9
0
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0
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54
views
How local socket is differentiated?
In case of multiprocessor environment where IPC is implemented using a sockets How can we make sure each socket is identified.
For example In our environment we have around 14 process and each of them ...
0
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0
answers
316
views
AppImage unmount / process kill option
fresh started with linux, im trying to migrate from my win media srv to linux 20.04. i have qbittorrent appimage 4.4.3.1 installed, and the AppImage works fine. I have added the path to the appimage ...
- 9
0
votes
0
answers
350
views
spamassassin "spamd child" process using 90% or more CPU
On my Ubuntu box, one of spamd child processes often takes 90%+ CPU.
This started a few months ago. The box had worked for many years without this problem.
I thought installing 21.10 caused it and ...
- 155
1
vote
0
answers
34
views
How to reserve an autogroup percentage to one process in a script?
So I have this code:
AUTO=$(cat /proc/sys/kernel/sched_autogroup_enabled)
echo 0 > /proc/sys/kernel/sched_autogroup_enabled
setsid -w taskset 1 ../esx 100000000 8 3 0 0 0 0 2>/dev/null &
...
- 111
0
votes
1
answer
749
views
simple-scan Ubuntu 22.04 : error message while saving file - ghost process
since I am using Ubuntu 22.04, simple-scan shows this error message when saving the scanned page :
Failed to execute child process " " (No such file or directory).
It really saves the file,...
- 73
0
votes
0
answers
61
views
How to Tell Activity Monitor to Measure in GB instead of GiB?
I use the Activity Monitor application a lot, and I frequently need to know how much memory an application is using. Is there a way to tell the activity monitor to measure in GB instead of GiB?
Here's ...
- 1,349
2
votes
2
answers
2k
views
Check if process does or does not exist
I want to write script that accepts process name (I ask the user for process name each time followed by a prompt on the same line) if process exists it will print "EXISTS" or if it doesn't ...
- 1,002
0
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1
answer
1k
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How do I determine if a .NET Core application is currently running on linux
How do I determine if a specific .NET Core application is currently running on Linux and isn't failing, if it's application log shows no data?
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1
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4
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1k
views
How to stop a process named "Code" that has high CPU usage?
I have one process named "Code" that has high CPU usage. I don't know what this process is and how I can stop it.
Can you help me fix this?
- 11
3
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1
answer
1k
views
Can we get process list using sar in Ubuntu?
Is able to get a processes list that runs on April 11 in the Ubuntu Server using sar or other tools.
0
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1
answer
166
views
sudo command make child process to zombies
I'm trying to make a program that divides into child and parent processes with fork(). Child executes arguments with execv() and parent traces him with ptrace(). I made almost all parts of the program,...
1
vote
1
answer
3k
views
Optimize thermal daemon
I just discovered thermald for preventing machines from overheating. I'd like some basic suggestions on how to modify the xml configuration file. Below is the one I have at /etc/thermald/thermal-conf....
- 577
0
votes
2
answers
469
views
How to determine the parent of a process like "ls"
I've read methods of determining the parent of running processes but how would I determine the parent of a process thats lifecycle is too short to run a command like pstree without the process already ...
0
votes
2
answers
254
views
Kill a specific window, but not the entire suite of windows belonging to one program?
Currently using KDE.
I'd like a shortcut that's able to kill a window, but not all windows of the same process.
For example, right now I'm using xkill to kill windows using the mouse. I love it, but ...
- 181
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0
answers
69
views
KDE-related processes
Important: I used to have the KDE Plasma DE installed but I removed that months ago.
I checked activity monitor like I do a lot, and I decided to check the "all processes" button instead of ...
- 1,349
0
votes
1
answer
4k
views
Restart an app when it crashes
I state that I know practically nothing, I have found some solution that could do for my case but it is not quite how I would like it to be.
In practice I would like to create a script that when the ...
- 1