December 2018
Beginner
320 pages
8h 57m
English
Content preview from CentOS Quick Start Guide
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What is systemd?
From CentOS 7 onward, systemd has replaced the init process as the first process (PID=1) that is started by the kernel when Linux boots up. It manages the system and services in the system for the Linux kernel by providing an interface between applications and the kernel. After starting systemd, it starts logging activities, mounting the filesystem and devices, starts other services, and finally provides the user with a login shell. These tasks are carried out by systemd with the help of different libraries and utilities such as systemctl, journalctl, hostenamectl, localectl, timedatectl, systemd-cgls, and so on, which it installs with itself. It manages the various system resources through objects known as units.
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