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Linux Intermediate

What is Systemd?

A system and service manager for Linux that initializes the system and manages services, logging, and more.

Systemd replaced the traditional SysVinit system in most modern Linux distributions. It manages the boot process, starts and stops services (units), handles logging via journald, and provides tools for system configuration.

Key commands include systemctl for service management and journalctl for log viewing. Systemd uses unit files to define service configurations.

Related Terms

Sysfs (/sys)
A virtual filesystem that exports information about kernel subsystems, hardware devices, and device drivers in a structured hierarchy.
Curl
A versatile command-line tool for transferring data using various network protocols, commonly used for API testing.
SELinux
Security-Enhanced Linux — a mandatory access control system that confines programs to minimum required privileges beyond standard file permissions.
Top/Htop
Interactive process viewers that display real-time system resource usage including CPU, memory, and running processes.
Kernel
The core component of an operating system that manages hardware resources and provides services to software.
Rsync
A fast, versatile file synchronization tool that efficiently transfers and syncs files between local and remote systems.
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