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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

Iptables
The traditional Linux firewall tool that filters network packets using configurable chains of rules organized in tables.
Sysfs (/sys)
A virtual filesystem that exports information about kernel subsystems, hardware devices, and device drivers in a structured hierarchy.
Systemctl
The primary command for managing systemd services, including starting, stopping, enabling, and checking service status.
Procfs (/proc)
A virtual filesystem in Linux that provides an interface to kernel data structures, exposing process and system information as files.
Network Namespace
A Linux kernel feature that provides isolated network stacks with independent interfaces, routing tables, and firewall rules.
Symbolic Link
A special file that acts as a shortcut pointing to another file or directory in the filesystem.
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