Demonizing a command means to make it run as a background process.
so when we have a command that we want to daemonize there are many ways to do it, most common methods are:
using upstart
adding it to /etc/rc.local
creating a script in /etc/init.d and adding them to runlevel folders manually (i.e. incase you want to start, stop a command)
Most easiest seems to be using supervisor
Installing Supervisor and sample configuration file:
installing it in ubuntu or any Debian based system is as simple as
sudo apt-get install supervisor
now you can create your configurations in /etc/supervisor/conf.d/ folder with extension ".conf"
a simple configuration file at /etc/supervisor/conf.d/test-program.conf will look as
[program:]
command =
stdout_logfile =
stderr_logfile =
logfile_maxbytes = 50MB ; optional
logfile_backups = 10 ; needed if you want to rotate log files
user = root ; user as which the script should be executed
environment=variable1='value',variable2='value' ; environment variale to pass if any
Daemonizig the command:
supervisorctl reread
supervisorctl update
The first command re-reads the configuration files and detects any changes
The second command updates the supervisor process with the new or changed configurations.
Now you have daemonized the command as background process
Other useful commands:
Stopping a process:
sudo supervisorctl stop
sudo supervisorctl stop all
starting a process
sudo supervisorctl stop
restarting a process
sudo supervisorctl restart
sudo supervisorctl restart all
Letsencrypt wildcard - Setup wildcard subdomain using letsencrypt and certbot
To get wildcard supported certificates, we need to pass the challenge which requires adding TXT records in your dns records. To get certificates for single domains, …
Deploying Wordpress blog with Django using Docker Containers.
Containers run services in an isolated environment, if we deploy our applications using containers then the host system on which these containers are running will …
How to setup http password authentication with nginx
HTTP Authentication is used to allow access limit to a site or particular directories by validating the username and password. HTTP basic authentication can also …
Kubernetes manages containerized applications across multiple hosts. With years of experience in managing highly scalable products, google has released kubernetes an open source project which …
Clustering of Docker Containers using Docker Swarm
There are many available ways of Docker clustering. Kubernetes, Docker cloud, Docker Swarm etc., In this Tutorial we will learn setting up a cluster using …
Setting Up Gitlab container Registry on own Domain.
GitLab Container Registry is a secure and private registry for Docker images integrated completely in Gitlab. In this tutorial we will setup and use GitLab …
HTTP2 and SPDY Protocols - Make HTTP Faster and Safer
HTTP/2, next version of HTTP/1, http/1 can not handle the present web which has become more resource intensive, it cannot processes multiple requests in an …
How to Deploy Django Project into Docker Container
Docker, has captured the hearts and minds of the Devops community, with its platform for delivering distributed applications in containers. In this Blog Post, Lets …
How to deploy django with uwsgi and nginx using Ansible play book
Ansible is a scripting language mostly used to automate installing applications, deploying apps etc.. Why Ansible: You may think why learn new language if I can do …
Configuring SSL is beneficial not only for security purpose but also for SEO too. Linuxsoftware foundation's initiated a program called Let’s Encrypt to give ssl certificates …
Ansible is one of the few automation tools which uses an agentless architecture, where you dont need to install daemons in client nodes for interacting …
Shield allows you to protect elastic search data with a username and password. It provides additional functionalities like encryption, role-based access control, IP filtering. It …
Web-hooks play vital role if you are in Continuous Integration(CI). Higher Level organizations follow GitLab for CI purposes if they operate on open source solutions …
After Installing Elastic Search in production, many new developers leave it unconfigured. In this Post, we will look into important config file changes and its …
Configuring WordPress Blog as sub-directory alongside Django in Nginx
Using regular expressions within Nginx we can bind urls to particular application servers, below we will configure wordpress blog and django site to be deployed …
In 1994, FHS(File System Hierarchy Standard) was proposed, it describes the directory structure of UNIX and UNIX-like systems(Linux). Before FHS was proposed, there had been …
PostgreSQL or simply postgres is the most advanced, SQL-compliant and open-source objective-RDBMS. In This Article, you will learn how to Install, Connect and Manage a …
Using Fabric, we can configure Linux production server with uwsgi, nginx, vsftpd, mysql, mongodb, postfix, php, python tools, and other relevant pieces of software single-handedly …
More Often you wouldve come across sharing screens with applications like Teamviewer, Windows Remote Desktop Connection or remmina (if you're a linux user). But if …
Celery is a task queue with focus on real-time processing, while also supports task scheduling. Task queues are used as mechanisms to distribute work across …
Subscribe and Stay Updated about our Webinars, news and articles on Django, Python, Machine Learning, Amazon Web Services, DevOps, Salesforce, ReactJS, AngularJS, React Native.
* We don't provide your email contact details to any third parties
Need Help?
Need any Help in your Project? Talk to our Experts regarding your Queries Let's Talk