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Linux Intermediate

What is Daemon?

A background process that runs continuously on a system, typically providing services like web serving or logging.

Daemons are background processes that start during system boot or on demand and run without direct user interaction. Common examples include httpd (web server), sshd (SSH server), and cron (task scheduler).

The name comes from Greek mythology, referring to helpful supernatural beings. In Linux, daemons are conventionally named with a "d" suffix.

Related Terms

Namespace
A Linux kernel feature that provides process isolation by creating separate instances of global system resources.
Disk Quota
A system for limiting the amount of disk space or number of files that individual users or groups can consume on a filesystem.
Root User
The superuser account in Unix/Linux systems with unrestricted access to all commands and files.
Chroot
A mechanism that changes the apparent root directory for a process and its children, creating an isolated filesystem view.
Journald
The systemd journal daemon that collects and stores log data from services, the kernel, and boot messages in a structured binary format.
Crontab Syntax
The time specification format used in cron job scheduling, with five fields defining minute, hour, day of month, month, and day of week.
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