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Get to know daemons and what is their functionality on Linux systems.
Pursuing my undergraduate degree in Electronics and Telecommunication. With a programming experience of 5 years I have contributed to open source from the very start. I have a keen interest in evolving technology and love to get a hands on experience with them. My main goal is to demystify technology for everyone.
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There's a saying - 'The devil is at his strongest while we're looking the other way.'
Like a program running in the background silently. While we're busy doing other shit. 'Daemons,' they call them. They perform action without user interaction. Monitoring, logging, notifications....
Pronounced as day-mons. Daemons are processes that run in the background. They are usually used to perform tasks that are not directly related to the user. For example, a daemon might be used to monitor a network connection and log the traffic.
A simple way of identifying daemons on your linux system is to run the pstree command.
pstree
You can summon your daemons by running the service command.
service <daemon> start
service <daemon> stop
service <daemon> restart
service <daemon> status
Want to spin up a daemon?
sudo systemctl start <daemon>
sudo systemctl stop <daemon>
sudo systemctl restart <daemon>
sudo systemctl status <daemon>
Finally using systemd you can manage your daemons. A quick boot up daemon example has already been published by me here - Running Scripts On Boot.
A quick way to identify daemons even includes looking at the suffix of services. If it ends with a d it's a daemon.
Examples:
mysqldsystemdhttpdsshd