Questions tagged [daemon]
Computer program that runs as a background process, rather than being under the direct control of an interactive user.
423
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c# script waiting in terminal but exiting directly as a daemon
i am a complete c# noob (i know Java though)
i have a c# script i modified. I want to run it at startup using a daemon and systemctl (the original is this NZXT automatic fan controller script)
the ...
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1
answer
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enabled systemd service won't start on boot
I have 7 services enabled, 6 of them depend 1 the first one starting and it runs fine.
3 start fine and the other 3 won't start on boot but if I run sudo systemctl start service it runs fine.
Can you ...
6
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1
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What are the daemon user and group for?
I am configuring a web server on OpenBSD and I can see in /var/www/ that all directories except /var/www/cache/ are root:daemon.
I then see that the user for the daemon group is daemon
$ grep daemon /...
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2
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Get output and input into daemon processes
Background
When a SIGHUP is sent to a running nginx master process to reconfigure, if there're password encrypted certificate key, nginx(specifically the openssl library) will ask for input, as in the ...
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How do I setup an Ubuntu package to start a user service and only start it when the user logs in?
I am trying to setup a service which requires access to X-Windows and DBus. First I tried it as a background application, but that just doesn't work. I use the "auto-log user" feature. Now I ...
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2
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Does a process specified in systemd have to be a daemon?
I have a server that I want to add to systemd so that it launch automatically and restarts on crash.
Does the server have to be a daemon?
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Play a sound from a daemon Linux
I have Manjaro Linux and I am trying to play a sound (mp3 and wav) using a script from a daemon.
Basically, I have a script.sh with a command trying to play the sound. This script is called from a ...
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515
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Create a background daemon to listen for incoming SSH requests
I'm just trying to see if this is possible before I start working on it. Here's the scenario, I want the server to be constantly listening for SSH requests (which I'm sure it already does, I just don'...
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1
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ssh-add not able to connect to ssh-agent
I know that ssh-add is "front-end" of ssh-agent.
But ssh-agent on my computer is already running (I could find it in top). When I type ssh-add, it said "Could not open a connection to ...
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1
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669
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Debian 10: Checking the Status of Services
I want to know if it is possible when checking the status of a service on the system with systemctl status application.service, see the full log lines, not only the first few log lines
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systemd: allow override of After= directive
I have two services, service Init and service Daemon.
Service Init does system setup and is often used to setup a configuration file for service Daemon (ie, echo "MY_ENV_VAR=true" >> /etc/...
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Missing '='. in Debian service
I've created this service in /etc/systemd/system/webapp.service
in a:
Distributor ID: Debian
Description: Debian GNU/Linux 10 (buster)
Release: 10
This is the content:
[Unit]
Description=...
10
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2
answers
11k
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systemd not detected, dockerd daemon needs to be started manually
I am trying to install Docker daemon as non root user, following this guide:
https://docs.docker.com/engine/security/rootless/
First, I removed the existing rootful docker daemon.
Then I created a ...
10
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3
answers
2k
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Why do daemons only read their configuration file when they start up? Why can't they "react" to changes in that file/hot reload? [closed]
I know daemons have to be sent a HUP for config changes to take effect. But I'm wondering why this is, and if it is possible to create a daemon responsive to such changes.
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2
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Are 'per-user' daemon services a new thing?
I always had the impression that daemon processes were system-wide services that are run, owned, controlled and maintained by the 'init' system. However, I have recently learned that some daemon ...
2
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1
answer
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How to make daemon unique?
In linux, is there a way to make a daemon "unique" ?
Ie if the daemon is already started/running, not start it again.
I think it can be done by creating a specific file when the daemon is first ...
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2
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2k
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Is it possible to set niceness value of a program in advance?
I want my games and certain programs (such as WINE) to be automatically given a higher priority then everything else, and while I'm at it I probably want to adjust the niceness value of a few other ...
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1
answer
337
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Where to put AWS credentials for daemon user?
I have a script that backs up a directory to AWS S3 every night. (The script is run via a systemd timer.) I would like to create a dedicated user for this service. Ordinarily, I would not create a ...
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1
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951
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How to use Triggerhappy deamon to overwrite files
I have Rpi4 with Volumio 2.729 installed. I use Triggerhappy to run a node.js script when keyboard button is pressed - the script will play corresponding internet radio station:
module.paths.push('/...
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0
answers
304
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Systemctl daemon only works when verbose is enabled
I have a daemon in init.d which except for the name and description has exactly the same structure as the standard ubuntu skeleton file. When I try to run said daemon using
sudo /etc/init.d/mydaemon ...
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1
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How to handle information overflow of man and the documentation?
I keep asking myself how to get familiar with the software (mostly a daemon) and its configuration.
When running
man <program name>
I am very overwhelmed by the options available.
How do ...
3
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2
answers
5k
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Debugging systemd service
I'm trying to create a daemon to monitor my system's CPU temps and adjust the clock-rate if it gets too high, but I've never written a daemon before and I'm not sure I've done any of it right.
I ...
2
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1
answer
1k
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How to create daemon without systemd
I'm using AntiX Linux, which is not using systemd, and I want to create a daemon in which I can echo to do something. How do I do that properly?
This is how I want to use it:
...
echo "got signal ...
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1
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422
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How are the kernel daemons running automatically?
I have written my custom init (PID 1) script. In that script I have just mounted the necessary filesystems, but if I run ps aux the list is similar to below:
/ # ps aux
PID USER TIME COMMAND
...
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1
answer
3k
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jitsi-videobridge.service: daemons using outdated libraries
Ever since the installation of the Jitsi video conference software, when executing needrestart, a utility that checks which daemons need to be restarted after library upgrades (or each time new ...
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1
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415
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launch a dotnet core executable through daemon systemd in relative path
I have developed and published a web application on dotnet core for linux arm machine. To do this, the command has been launched:
dotnet publish --runtime linux-arm -p:PublishSingleFile=true
And as ...
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1
answer
170
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Track daily, weekly, monthly computer usage?
I am looking for a simple program to run in the background and track my computer usage (number of hours) with simple reporting for daily, weekly and monthly time frames. My environment:
Fedora ...
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1
answer
1k
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Unable to get systemd to active status
I'm trying to use systemd on Ubuntu 16.04 to run a python 3 process. I've been following the article How to Install and Configure Supervisor on Ubuntu 16.04.
I'm unable to get the systemd service ...
16
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3
answers
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What is the avahi daemon?
I just learning about daemon, by that time I came know avahi daemon can you please explain detaily about avahi daemon and why linux has a avahi user ?
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AIX and daemon service
I see that the daemon service is started and stopped via the commands:
startsrc and stopsrc on group/subsystem.
I have init.d script and I want to make it daemon service in AIX.
From these commands ...
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1
answer
691
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auto nice daemon
I know path to parent executable (launcher).
I would like to kill all other launchers without child processes (if any).
I don't know PID of child process(es).
Only kids should have high priority (...
2
votes
1
answer
659
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Cronjobs not running. Cron daemon not working
First of all, the server specs:
VPS - OpenVZ,
Ubuntu 14,
Kernel 3.10
Now, it appears that the cron daemon is not running ANY crojobs at all and i cannot find out why.
I tried:
Rebooting the server....
1
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1
answer
558
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Programs can't connect to pulseaudio unless I kill and restart the daemon
The pulseaudio daemon is running after startup, but I can't change the volume because pamixer and pavucontrol can't connect to the daemon. I have to kill and restart the daemon to get everything ...
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92
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How can I automatically revert a file's ownership when changed?
I have a file that is periodically updated by vendor software. When this happens, it changes the group ownership, and my internal system can no longer read it.
Is there a simple way to update the ...
3
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1
answer
5k
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Virtual Machine manager Connection Failures
I want to apologize before I begin-- I know that this problem has been asked about before, and I've found some of the threads. Unfortunately, I'm extremely new to Linux, and I'm getting lost trying to ...
1
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1
answer
994
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Windows Subsystem for Linux (WSL) not actually saving $DOCKER_HOST
The situation:
I develop on a windows VDI that uses the WSL to run docker, and I'm actually using a remote docker daemon running on a Red Hat server. Locally, I have the DOCKER_HOST variable set to ...
3
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1
answer
2k
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What is the difference between Daemon and the normal running process?
I have been implementing various services in python for a Linux based embedded system. There is one driver service that needs to run forever as soon as the system boots. It spawns the other services ...
2
votes
1
answer
70
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How to boot el6 linux without some enabled daemon running?
I've installed Oracle Linux 6 and Oracle 12c.
I don't remember if I've configured crontab to launch some script or not, but during the system's booting, it stops just after crond daemon has been ...
1
vote
1
answer
3k
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Executing a daemon using systemd service doesn't return
I'm trying to execute a daemon program from a systemd service, however when I start the script from a command prompt, either manually (systemctl start) or as part of the debian installation (dpkg -i ...
1
vote
1
answer
102
views
Debian: set a command to be "always up" (and restart when updated)
Suppose I have a REST API defined in:
rest-api.py
Which I would like to make 'always up':
setsid rest-api.py 2>&1 > /var/rest-api/log.0
logrotate rest-api.conf
# now: command to watch ...
0
votes
2
answers
616
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Unable to power up systemd service
I just got everything set and done with my python flask project and I would like to make a service out of it.
In order to get started, I've made a bash file which is supposed to start the server and ...
0
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0
answers
764
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systemd: forking process immediately calls execStop
I've set this up as a barebones thing we'd like to get running on a machine:
[Unit]
Description=My Daemon
[Service]
Type=forking
ExecStart=/opt/myscript/daemonWrapper start
# ExecStop=/opt/myscript/...
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3
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6k
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Unable to connect with MongoDB when giving mongod command in Cli
I'm trying to install mongoDb on centos VM and followed few sites like https://linuxize.com/post/how-to-install-mongodb-on-centos-7/ , https://www.digitalocean.com/community/tutorials/how-to-install-...
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3
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4k
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Proper way to start a background process
I am just trying to start up a basic node.js server on a remote machine in a ssh session. This seems to work:
nohup node server/server.js & disown
Maybe I don't need nohup? what's the "official"...
1
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2
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7k
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System service running python code exit with error code status 1
_note: the original posted question is edited and its faced has changed quite a bit!
Summary:
A python script using apshceduler fails to load as service with exit code staus1. Important to note that ...
2
votes
1
answer
918
views
How to run a daemon only when a specific application is running?
I have a user-space daemon, call it maxwell, that executes various actions based on D-bus signals from another application, call it room. I would like to run maxwell as soon as the user starts room, ...
0
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1
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439
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How to restart a systemd service whenever Chromium-browser opens/launches?
I have a systemd service that must be restarted whenever Chromium-browser opens/launches.
[Unit]
Description=Load cgroup configs
After=multi-user.target
[Service]
Type=forking
ExecStartPre=/bin/echo ...
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0
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427
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How to run a process in background on startup?
I'm trying to run a process(myfile) on startup on my yocto linux board, but I'm getting either IOCTL or segmentation fault while I use nohup or & to run in background. I could run myfile in ...
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1
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Is it possible to make a crontab using daemon?
We were asked to make a whole cron stuff, not making the cron job but the actual cron that will work with the date/time that we input to them.
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0
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49
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How to ensure custom Debian service starts first?
I am writing a custom application on Debian on a beaglebone black variant. I want to have my application be the first service that gets started when the system boots, and I want the system to wait ...